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Edit File: xpdo.class.php

<?php /* * OpenExpedio ("xPDO") is an ultra-light, PHP 5.2+ compatible ORB (Object- * Relational Bridge) library based around PDO (http://php.net/pdo/). * * Copyright 2010-2014 by MODX, LLC. * * This file is part of xPDO. * * xPDO is free software; you can redistribute it and/or modify it under the * terms of the GNU General Public License as published by the Free Software * Foundation; either version 2 of the License, or (at your option) any later * version. * * xPDO is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR * A PARTICULAR PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with * xPDO; if not, write to the Free Software Foundation, Inc., 59 Temple Place, * Suite 330, Boston, MA 02111-1307 USA */ /** * This is the main file to include in your scripts to use xPDO. * * @author Jason Coward <xpdo@opengeek.com> * @copyright Copyright (C) 2006-2014, Jason Coward * @license http://opensource.org/licenses/gpl-2.0.php GNU Public License v2 * @package xpdo */ if (!defined('XPDO_PHP_VERSION')) { /** * Defines the PHP version string xPDO is running under. */ define('XPDO_PHP_VERSION', phpversion()); } if (!defined('XPDO_CLI_MODE')) { if (php_sapi_name() == 'cli') { /** * This constant defines if xPDO is operating from the CLI. */ define('XPDO_CLI_MODE', true); } else { /** @ignore */ define('XPDO_CLI_MODE', false); } } if (!defined('XPDO_CORE_PATH')) { /** * @internal This global variable is only used to set the {@link * XPDO_CORE_PATH} value upon initial include of this file. Not meant for * external use. * @var string * @access private */ $xpdo_core_path= strtr(realpath(dirname(__FILE__)), '\\', '/') . '/'; /** * @var string The full path to the xPDO root directory. * * Use of this constant is recommended for use when building any path in * your xPDO code. * * @access public */ define('XPDO_CORE_PATH', $xpdo_core_path); } if (!class_exists('PDO')) { //@todo Handle PDO configuration errors here. } /** * A wrapper for PDO that powers an object-relational data model. * * xPDO provides centralized data access via a simple object-oriented API, to * a defined data structure. It provides the de facto methods for connecting * to a data source, getting persistence metadata for any class extended from * the {@link xPDOObject} class (core or custom), loading data source managers * when needed to manage table structures, and retrieving instances (or rows) of * any object in the model. * * Through various extensions, you can also reverse and forward engineer classes * and metadata maps for xPDO, have classes, models, and properties maintain * their own containers (databases, tables, columns, etc.) or changes to them, * and much more. * * @package xpdo */ class xPDO { /**#@+ * Constants */ const OPT_AUTO_CREATE_TABLES = 'auto_create_tables'; const OPT_BASE_CLASSES = 'base_classes'; const OPT_BASE_PACKAGES = 'base_packages'; const OPT_CACHE_COMPRESS = 'cache_compress'; const OPT_CACHE_DB = 'cache_db'; const OPT_CACHE_DB_COLLECTIONS = 'cache_db_collections'; const OPT_CACHE_DB_OBJECTS_BY_PK = 'cache_db_objects_by_pk'; const OPT_CACHE_DB_EXPIRES = 'cache_db_expires'; const OPT_CACHE_DB_HANDLER = 'cache_db_handler'; const OPT_CACHE_DB_SIG_CLASS = 'cache_db_sig_class'; const OPT_CACHE_DB_SIG_GRAPH = 'cache_db_sig_graph'; const OPT_CACHE_EXPIRES = 'cache_expires'; const OPT_CACHE_FORMAT = 'cache_format'; const OPT_CACHE_HANDLER = 'cache_handler'; const OPT_CACHE_KEY = 'cache_key'; const OPT_CACHE_PATH = 'cache_path'; const OPT_CACHE_PREFIX = 'cache_prefix'; const OPT_CACHE_ATTEMPTS = 'cache_attempts'; const OPT_CACHE_ATTEMPT_DELAY = 'cache_attempt_delay'; const OPT_CALLBACK_ON_REMOVE = 'callback_on_remove'; const OPT_CALLBACK_ON_SAVE = 'callback_on_save'; const OPT_CONNECTIONS = 'connections'; const OPT_CONN_INIT = 'connection_init'; const OPT_CONN_MUTABLE = 'connection_mutable'; const OPT_HYDRATE_FIELDS = 'hydrate_fields'; const OPT_HYDRATE_ADHOC_FIELDS = 'hydrate_adhoc_fields'; const OPT_HYDRATE_RELATED_OBJECTS = 'hydrate_related_objects'; const OPT_LOCKFILE_EXTENSION = 'lockfile_extension'; const OPT_USE_FLOCK = 'use_flock'; /** * @deprecated * @see call() */ const OPT_LOADER_CLASSES = 'loader_classes'; const OPT_ON_SET_STRIPSLASHES = 'on_set_stripslashes'; const OPT_SETUP = 'setup'; const OPT_TABLE_PREFIX = 'table_prefix'; const OPT_VALIDATE_ON_SAVE = 'validate_on_save'; const OPT_VALIDATOR_CLASS = 'validator_class'; const LOG_LEVEL_FATAL = 0; const LOG_LEVEL_ERROR = 1; const LOG_LEVEL_WARN = 2; const LOG_LEVEL_INFO = 3; const LOG_LEVEL_DEBUG = 4; const SCHEMA_VERSION = '1.1'; /** * @var PDO A reference to the PDO instance used by the current xPDOConnection. */ public $pdo= null; /** * @var array Configuration options for the xPDO instance. */ public $config= null; /** * @var xPDODriver An xPDODriver instance for the xPDOConnection instances to use. */ public $driver= null; /** * A map of data source meta data for all loaded classes. * @var array * @access public */ public $map= array (); /** * A default package for specifying classes by name. * @var string * @access public */ public $package= ''; /** * An array storing packages and package-specific information. * @var array * @access public */ public $packages= array (); /** * {@link xPDOManager} instance, loaded only if needed to manage datasource * containers, data structures, etc. * @var xPDOManager * @access public */ public $manager= null; /** * @var xPDOCacheManager The cache service provider registered for this xPDO * instance. */ public $cacheManager= null; /** * @var string A root path for file-based caching services to use. */ private $cachePath= null; /** * @var array An array of supplemental service classes for this xPDO instance. */ public $services= array (); /** * @var float Start time of the request, initialized when the constructor is * called. */ public $startTime= 0; /** * @var int The number of direct DB queries executed during a request. */ public $executedQueries= 0; /** * @var int The amount of request handling time spent with DB queries. */ public $queryTime= 0; public $classMap = array(); /** * @var xPDOConnection The current xPDOConnection for this xPDO instance. */ public $connection = null; /** * @var array PDO connections managed by this xPDO instance. */ private $_connections = array(); /** * @var integer The logging level for the xPDO instance. */ protected $logLevel= xPDO::LOG_LEVEL_FATAL; /** * @var string The default logging target for the xPDO instance. */ protected $logTarget= 'ECHO'; /** * Indicates the debug state of this instance. * @var boolean Default is false. * @access protected */ protected $_debug= false; /** * A global cache flag that can be used to enable/disable all xPDO caching. * @var boolean All caching is disabled by default. * @access public */ public $_cacheEnabled= false; /** * Indicates the opening escape character used for a particular database engine. * @var string * @access public */ public $_escapeCharOpen= ''; /** * Indicates the closing escape character used for a particular database engine. * @var string * @access public */ public $_escapeCharClose= ''; /** * Represents the character used for quoting strings for a particular driver. * @var string */ public $_quoteChar= "'"; /** * @var array A static collection of xPDO instances. */ protected static $instances = array(); /** * Create, retrieve, or update specific xPDO instances. * * @static * @param string|int|null $id An optional identifier for the instance. If not set * a uniqid will be generated and used as the key for the instance. * @param array|null $config An optional array of config data for the instance. * @param bool $forceNew If true a new instance will be created even if an instance * with the provided $id already exists in xPDO::$instances. * @throws xPDOException If a valid instance is not retrieved. * @return xPDO An instance of xPDO. */ public static function getInstance($id = null, $config = null, $forceNew = false) { $instances =& self::$instances; if (is_null($id)) { if (!is_null($config) || $forceNew || empty($instances)) { $id = uniqid(__CLASS__); } else { $id = key($instances); } } if ($forceNew || !array_key_exists($id, $instances) || !($instances[$id] instanceof xPDO)) { $instances[$id] = new xPDO(null, null, null, $config); } elseif ($instances[$id] instanceof xPDO && is_array($config)) { $instances[$id]->config = array_merge($instances[$id]->config, $config); } if (!($instances[$id] instanceof xPDO)) { throw new xPDOException("Error getting " . __CLASS__ . " instance, id = {$id}"); } return $instances[$id]; } /** * The xPDO Constructor. * * This method is used to create a new xPDO object with a connection to a * specific database container. * * @param mixed $dsn A valid DSN connection string. * @param string $username The database username with proper permissions. * @param string $password The password for the database user. * @param array|string $options An array of xPDO options. For compatibility with previous * releases, this can also be a single string representing a prefix to be applied to all * database container (i. e. table) names, to isolate multiple installations or conflicting * table names that might need to coexist in a single database container. It is preferrable to * include the table_prefix option in the array for future compatibility. * @param array|null $driverOptions Driver-specific PDO options. * @throws xPDOException If an error occurs creating the instance. * @return xPDO A unique xPDO instance. */ public function __construct($dsn, $username= '', $password= '', $options= array(), $driverOptions= null) { try { $this->config = $this->initConfig($options); $this->setLogLevel($this->getOption('log_level', null, xPDO::LOG_LEVEL_FATAL, true)); $this->setLogTarget($this->getOption('log_target', null, XPDO_CLI_MODE ? 'ECHO' : 'HTML', true)); if (!empty($dsn)) { $this->addConnection($dsn, $username, $password, $this->config, $driverOptions); } if (isset($this->config[xPDO::OPT_CONNECTIONS])) { $connections = $this->config[xPDO::OPT_CONNECTIONS]; if (is_string($connections)) { $connections = $this->fromJSON($connections); } if (is_array($connections)) { foreach ($connections as $connection) { $this->addConnection( $connection['dsn'], $connection['username'], $connection['password'], $connection['options'], $connection['driverOptions'] ); } } } $initOptions = $this->getOption(xPDO::OPT_CONN_INIT, null, array()); $this->config = array_merge($this->config, $this->getConnection($initOptions)->config); $this->getDriver(); $this->setPackage('om', XPDO_CORE_PATH, $this->config[xPDO::OPT_TABLE_PREFIX]); if (isset($this->config[xPDO::OPT_BASE_PACKAGES]) && !empty($this->config[xPDO::OPT_BASE_PACKAGES])) { $basePackages= explode(',', $this->config[xPDO::OPT_BASE_PACKAGES]); foreach ($basePackages as $basePackage) { $exploded= explode(':', $basePackage, 2); if ($exploded) { $path= $exploded[1]; $prefix= null; if (strpos($path, ';')) { $details= explode(';', $path); if ($details && count($details) == 2) { $path= $details[0]; $prefix = $details[1]; } } $this->addPackage($exploded[0], $path, $prefix); } } } $this->loadClass('xPDOObject'); $this->loadClass('xPDOSimpleObject'); if (isset($this->config[xPDO::OPT_BASE_CLASSES])) { foreach (array_keys($this->config[xPDO::OPT_BASE_CLASSES]) as $baseClass) { $this->loadClass($baseClass); } } if (isset($this->config[xPDO::OPT_CACHE_PATH])) { $this->cachePath = $this->config[xPDO::OPT_CACHE_PATH]; } } catch (Exception $e) { throw new xPDOException("Could not instantiate xPDO: " . $e->getMessage()); } } /** * Initialize an xPDO config array. * * @param string|array $data The config input source. Currently accepts a PHP array, * or a PHP string representing xPDO::OPT_TABLE_PREFIX (deprecated). * @return array An array of xPDO config data. */ protected function initConfig($data) { if (is_string($data)) { $data= array(xPDO::OPT_TABLE_PREFIX => $data); } elseif (!is_array($data)) { $data= array(xPDO::OPT_TABLE_PREFIX => ''); } return $data; } /** * Add an xPDOConnection instance to the xPDO connection pool. * * @param string $dsn A PDO DSN representing the connection details. * @param string $username The username credentials for the connection. * @param string $password The password credentials for the connection. * @param array $options An array of options for the connection. * @param null $driverOptions An array of PDO driver options for the connection. * @return boolean True if a valid connection was added. */ public function addConnection($dsn, $username= '', $password= '', array $options= array(), $driverOptions= null) { $added = false; $connection= new xPDOConnection($this, $dsn, $username, $password, $options, $driverOptions); if ($connection instanceof xPDOConnection) { $this->_connections[]= $connection; $added= true; } return $added; } /** * Get an xPDOConnection from the xPDO connection pool. * * @param array $options An array of options for getting the connection. * @return xPDOConnection|null An xPDOConnection instance or null if no connection could be retrieved. */ public function &getConnection(array $options = array()) { $conn =& $this->connection; $mutable = $this->getOption(xPDO::OPT_CONN_MUTABLE, $options, null); if (!($conn instanceof xPDOConnection) || ($mutable !== null && (($mutable == true && !$conn->isMutable()) || ($mutable == false && $conn->isMutable())))) { if (!empty($this->_connections)) { shuffle($this->_connections); $conn = reset($this->_connections); while ($conn) { if ($mutable !== null && (($mutable == true && !$conn->isMutable()) || ($mutable == false && $conn->isMutable()))) { $conn = next($this->_connections); continue; } $this->connection =& $conn; break; } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not get a valid xPDOConnection", '', __METHOD__, __FILE__, __LINE__); } } return $this->connection; } /** * Get or create a PDO connection to a database specified in the configuration. * * @param array $driverOptions An optional array of driver options to use * when creating the connection. * @param array $options An array of xPDO options for the connection. * @return boolean Returns true if the PDO connection was created successfully. */ public function connect($driverOptions= array (), array $options= array()) { $connected = false; $this->getConnection($options); if ($this->connection instanceof xPDOConnection) { $connected = $this->connection->connect($driverOptions); if ($connected) { $this->pdo =& $this->connection->pdo; } } return $connected; } /** * Sets a specific model package to use when looking up classes. * * This package is of the form package.subpackage.subsubpackage and will be * added to the beginning of every xPDOObject class that is referenced in * xPDO methods such as {@link xPDO::loadClass()}, {@link xPDO::getObject()}, * {@link xPDO::getCollection()}, {@link xPDOObject::getOne()}, {@link * xPDOObject::addOne()}, etc. * * @param string $pkg A package name to use when looking up classes in xPDO. * @param string $path The root path for looking up classes in this package. * @param string|null $prefix Provide a string to define a package-specific table_prefix. * @return bool */ public function setPackage($pkg= '', $path= '', $prefix= null) { if (empty($path) && isset($this->packages[$pkg])) { $path= $this->packages[$pkg]['path']; $prefix= !is_string($prefix) && array_key_exists('prefix', $this->packages[$pkg]) ? $this->packages[$pkg]['prefix'] : $prefix; } $set= $this->addPackage($pkg, $path, $prefix); $this->package= $set == true ? $pkg : $this->package; if ($set && is_string($prefix)) $this->config[xPDO::OPT_TABLE_PREFIX]= $prefix; return $set; } /** * Adds a model package and base class path for including classes and/or maps from. * * @param string $pkg A package name to use when looking up classes/maps in xPDO. * @param string $path The root path for looking up classes in this package. * @param string|null $prefix Provide a string to define a package-specific table_prefix. * @return bool */ public function addPackage($pkg= '', $path= '', $prefix= null) { $added= false; if (is_string($pkg) && !empty($pkg)) { if (!is_string($path) || empty($path)) { $this->log(xPDO::LOG_LEVEL_ERROR, "Invalid path specified for package: {$pkg}; using default xpdo model path: " . XPDO_CORE_PATH . 'om/'); $path= XPDO_CORE_PATH . 'om/'; } if (!is_dir($path)) { $this->log(xPDO::LOG_LEVEL_ERROR, "Path specified for package {$pkg} is not a valid or accessible directory: {$path}"); } else { $prefix= !is_string($prefix) ? $this->config[xPDO::OPT_TABLE_PREFIX] : $prefix; if (!array_key_exists($pkg, $this->packages) || $this->packages[$pkg]['path'] !== $path || $this->packages[$pkg]['prefix'] !== $prefix) { $this->packages[$pkg]= array('path' => $path, 'prefix' => $prefix); $this->setPackageMeta($pkg, $path); } $added= true; } } else { $this->log(xPDO::LOG_LEVEL_ERROR, 'addPackage called with an invalid package name.'); } return $added; } /** * Adds metadata information about a package and loads the xPDO::$classMap. * * @param string $pkg A package name to use when looking up classes/maps in xPDO. * @param string $path The root path for looking up classes in this package. * @return bool */ public function setPackageMeta($pkg, $path = '') { $set = false; if (is_string($pkg) && !empty($pkg)) { $pkgPath = str_replace('.', '/', $pkg); $mapFile = $path . $pkgPath . '/metadata.' . $this->config['dbtype'] . '.php'; if (file_exists($mapFile)) { $xpdo_meta_map = ''; include $mapFile; if (!empty($xpdo_meta_map)) { foreach ($xpdo_meta_map as $className => $extends) { if (!isset($this->classMap[$className])) { $this->classMap[$className] = array(); } $this->classMap[$className] = array_unique(array_merge($this->classMap[$className],$extends)); } $set = true; } } else { $this->log(xPDO::LOG_LEVEL_WARN, "Could not load package metadata for package {$pkg}."); } } else { $this->log(xPDO::LOG_LEVEL_ERROR, 'setPackageMeta called with an invalid package name.'); } return $set; } /** * Gets a list of derivative classes for the specified className. * * The specified className must be xPDOObject or a derivative class. * * @param string $className The name of the class to retrieve derivatives for. * @return array An array of derivative classes or an empty array. */ public function getDescendants($className) { $descendants = array(); if (isset($this->classMap[$className])) { $descendants = $this->classMap[$className]; if ($descendants) { foreach ($descendants as $descendant) { $descendants = array_merge($descendants, $this->getDescendants($descendant)); } } } return $descendants; } /** * Load a class by fully qualified name. * * The $fqn should in the format: * * dir_a.dir_b.dir_c.classname * * which will translate to: * * XPDO_CORE_PATH/om/dir_a/dir_b/dir_c/dbtype/classname.class.php * * @param string $fqn The fully-qualified name of the class to load. * @param string $path An optional path to start the search from. * @param bool $ignorePkg True if currently loaded packages should be ignored. * @param bool $transient True if the class is not a persistent table class. * @return string|boolean The actual classname if successful, or false if * not. */ public function loadClass($fqn, $path= '', $ignorePkg= false, $transient= false) { if (empty($fqn)) { $this->log(xPDO::LOG_LEVEL_ERROR, "No class specified for loadClass"); return false; } if (!$transient) { $typePos= strrpos($fqn, '_' . $this->config['dbtype']); if ($typePos !== false) { $fqn= substr($fqn, 0, $typePos); } } $pos= strrpos($fqn, '.'); if ($pos === false) { $class= $fqn; if ($transient) { $fqn= strtolower($class); } else { $fqn= $this->config['dbtype'] . '.' . strtolower($class); } } else { $class= substr($fqn, $pos +1); if ($transient) { $fqn= substr($fqn, 0, $pos) . '.' . strtolower($class); } else { $fqn= substr($fqn, 0, $pos) . '.' . $this->config['dbtype'] . '.' . strtolower($class); } } // check if class exists if (!$transient && isset ($this->map[$class])) return $class; $included= class_exists($class, false); if ($included) { if ($transient || (!$transient && isset ($this->map[$class]))) { return $class; } } $classname= $class; if (!empty($path) || $ignorePkg) { $class= $this->_loadClass($class, $fqn, $included, $path, $transient); } elseif (isset ($this->packages[$this->package])) { $pqn= $this->package . '.' . $fqn; if (!$pkgClass= $this->_loadClass($class, $pqn, $included, $this->packages[$this->package]['path'], $transient)) { foreach ($this->packages as $pkg => $pkgDef) { if ($pkg === $this->package) continue; $pqn= $pkg . '.' . $fqn; if ($pkgClass= $this->_loadClass($class, $pqn, $included, $pkgDef['path'], $transient)) { break; } } } $class= $pkgClass; } else { $class= false; } if ($class === false) { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not load class: {$classname} from {$fqn}."); } return $class; } protected function _loadClass($class, $fqn, $included= false, $path= '', $transient= false) { if (empty($path)) $path= XPDO_CORE_PATH; if (!$included) { /* turn to filesystem path and enforce all lower-case paths and filenames */ $fqcn= str_replace('.', '/', $fqn) . '.class.php'; /* include class */ if (!file_exists($path . $fqcn)) return false; if (!$rt= include_once ($path . $fqcn)) { $this->log(xPDO::LOG_LEVEL_WARN, "Could not load class: {$class} from {$path}{$fqcn}"); $class= false; } } if ($class && !$transient && !isset ($this->map[$class])) { $mapfile= strtr($fqn, '.', '/') . '.map.inc.php'; if (file_exists($path . $mapfile)) { $xpdo_meta_map= & $this->map; $rt= include ($path . $mapfile); if (!$rt || !isset($this->map[$class])) { $this->log(xPDO::LOG_LEVEL_WARN, "Could not load metadata map {$mapfile} for class {$class} from {$fqn}"); } else { if (!array_key_exists('fieldAliases', $this->map[$class])) { $this->map[$class]['fieldAliases'] = array(); } } } } return $class; } /** * Get an xPDO configuration option value by key. * * @param string $key The option key. * @param array $options A set of options to override those from xPDO. * @param mixed $default An optional default value to return if no value is found. * @return mixed The configuration option value. */ public function getOption($key, $options = null, $default = null, $skipEmpty = false) { $option= $default; if (is_array($key)) { if (!is_array($option)) { $default= $option; $option= array(); } foreach ($key as $k) { $option[$k]= $this->getOption($k, $options, $default); } } elseif (is_string($key) && !empty($key)) { if (is_array($options) && !empty($options) && array_key_exists($key, $options) && (!$skipEmpty || ($skipEmpty && $options[$key] !== ''))) { $option= $options[$key]; } elseif (is_array($this->config) && !empty($this->config) && array_key_exists($key, $this->config) && (!$skipEmpty || ($skipEmpty && $this->config[$key] !== ''))) { $option= $this->config[$key]; } } return $option; } /** * Sets an xPDO configuration option value. * * @param string $key The option key. * @param mixed $value A value to set for the given option key. */ public function setOption($key, $value) { $this->config[$key]= $value; } /** * Call a static method from a valid package class with arguments. * * Will always search for database-specific class files first. * * @param string $class The name of a class to to get the static method from. * @param string $method The name of the method you want to call. * @param array $args An array of arguments for the method. * @param boolean $transient Indicates if the class has dbtype derivatives. Set to true if you * want to use on classes not derived from xPDOObject. * @return mixed|null The callback method's return value or null if no valid method is found. */ public function call($class, $method, array $args = array(), $transient = false) { $return = null; $callback = ''; if ($transient) { $className = $this->loadClass($class, '', false, true); if ($className) { $callback = array($className, $method); } } else { $className = $this->loadClass($class); if ($className) { $className .= '_' . $this->getOption('dbtype'); $callback = array($className, $method); } } if (!empty($callback) && is_callable($callback)) { try { $return = call_user_func_array($callback, $args); } catch (Exception $e) { $this->log(xPDO::LOG_LEVEL_ERROR, "An exception occurred calling {$className}::{$method}() - " . $e->getMessage()); } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "{$class}::{$method}() is not a valid static method."); } return $return; } /** * Creates a new instance of a specified class. * * All new objects created with this method are transient until {@link * xPDOObject::save()} is called the first time and is reflected by the * {@link xPDOObject::$_new} property. * * @param string $className Name of the class to get a new instance of. * @param array $fields An associated array of field names/values to * populate the object with. * @return object|null A new instance of the specified class, or null if a * new object could not be instantiated. */ public function newObject($className, $fields= array ()) { $instance= null; if ($className= $this->loadClass($className)) { $className .= '_' . $this->config['dbtype']; if ($instance= new $className ($this)) { if (is_array($fields) && !empty ($fields)) { $instance->fromArray($fields); } } } return $instance; } /** * Finds the class responsible for loading instances of the specified class. * * @deprecated Use call() instead. * @param string $className The name of the class to find a loader for. * @param string $method Indicates the specific loader method to use, * loadCollection or loadObject (or other public static methods). * @return callable A callable loader function. */ public function getObjectLoader($className, $method) { $loader = false; if (isset($this->config[xPDO::OPT_LOADER_CLASSES]) && is_array($this->config[xPDO::OPT_LOADER_CLASSES])) { if ($ancestry = $this->getAncestry($className, true)) { if ($callbacks = array_intersect($ancestry, $this->config[xPDO::OPT_LOADER_CLASSES])) { if ($loaderClass = reset($callbacks)) { $loader = array($loaderClass, $method); while (!is_callable($loader) && $loaderClass = next($callbacks)) { $loader = array($loaderClass, $method); } } } } } if (!is_callable($loader)) { $loader = array('xPDOObject', $method); } return $loader; } /** * Retrieves a single object instance by the specified criteria. * * The criteria can be a primary key value, and array of primary key values * (for multiple primary key objects) or an {@link xPDOCriteria} object. If * no $criteria parameter is specified, no class is found, or an object * cannot be located by the supplied criteria, null is returned. * * @uses xPDOObject::load() * @param string $className Name of the class to get an instance of. * @param mixed $criteria Primary key of the record or a xPDOCriteria object. * @param mixed $cacheFlag If an integer value is provided, this specifies * the time to live in the object cache; if cacheFlag === false, caching is * ignored for the object and if cacheFlag === true, the object will live in * cache indefinitely. * @return object|null An instance of the class, or null if it could not be * instantiated. */ public function getObject($className, $criteria= null, $cacheFlag= true) { $instance= null; if ($criteria !== null) { $instance = $this->call($className, 'load', array(& $this, $className, $criteria, $cacheFlag)); } return $instance; } /** * Retrieves a collection of xPDOObjects by the specified xPDOCriteria. * * @uses xPDOObject::loadCollection() * @param string $className Name of the class to search for instances of. * @param object|array|string $criteria An xPDOCriteria object or an array * search expression. * @param mixed $cacheFlag If an integer value is provided, this specifies * the time to live in the result set cache; if cacheFlag === false, caching * is ignored for the collection and if cacheFlag === true, the objects will * live in cache until flushed by another process. * @return array|null An array of class instances retrieved. */ public function getCollection($className, $criteria= null, $cacheFlag= true) { return $this->call($className, 'loadCollection', array(& $this, $className, $criteria, $cacheFlag)); } /** * Retrieves an iterable representation of a collection of xPDOObjects. * * @param string $className Name of the class to search for instances of. * @param mixed $criteria An xPDOCriteria object or representation. * @param bool $cacheFlag If an integer value is provided, this specifies * the time to live in the result set cache; if cacheFlag === false, caching * is ignored for the collection and if cacheFlag === true, the objects will * live in cache until flushed by another process. * @return xPDOIterator An iterable representation of a collection. */ public function getIterator($className, $criteria= null, $cacheFlag= true) { return new xPDOIterator($this, array('class' => $className, 'criteria' => $criteria, 'cacheFlag' => $cacheFlag)); } /** * Update field values across a collection of xPDOObjects. * * @param string $className Name of the class to update fields of. * @param array $set An associative array of field/value pairs representing the updates to make. * @param mixed $criteria An xPDOCriteria object or representation. * @return bool|int The number of instances affected by the update or false on failure. */ public function updateCollection($className, array $set, $criteria= null) { $affected = false; if ($this->getConnection(array(xPDO::OPT_CONN_MUTABLE => true))) { $query = $this->newQuery($className); if ($query && !empty($set)) { $query->command('UPDATE'); $query->set($set); if (!empty($criteria)) $query->where($criteria); if ($query->prepare()) { $affected = $this->exec($query->toSQL()); if ($affected === false) { $this->log(xPDO::LOG_LEVEL_ERROR, "Error updating {$className} instances using query " . $query->toSQL(), '', __METHOD__, __FILE__, __LINE__); } else { if ($this->getOption(xPDO::OPT_CACHE_DB)) { $relatedClasses = array($query->getTableClass()); $related = array_merge($this->getAggregates($className), $this->getComposites($className)); foreach ($related as $relatedAlias => $relatedMeta) { $relatedClasses[] = $relatedMeta['class']; } $relatedClasses = array_unique($relatedClasses); foreach ($relatedClasses as $relatedClass) { $this->cacheManager->delete($relatedClass, array( xPDO::OPT_CACHE_KEY => $this->getOption('cache_db_key', null, 'db'), xPDO::OPT_CACHE_HANDLER => $this->getOption(xPDO::OPT_CACHE_DB_HANDLER, null, $this->getOption(xPDO::OPT_CACHE_HANDLER, null, 'cache.xPDOFileCache')), xPDO::OPT_CACHE_FORMAT => (integer) $this->getOption('cache_db_format', null, $this->getOption(xPDO::OPT_CACHE_FORMAT, null, xPDOCacheManager::CACHE_PHP)), xPDO::OPT_CACHE_PREFIX => $this->getOption('cache_db_prefix', null, xPDOCacheManager::CACHE_DIR), 'multiple_object_delete' => true )); } } $callback = $this->getOption(xPDO::OPT_CALLBACK_ON_SAVE); if ($callback && is_callable($callback)) { call_user_func($callback, array('className' => $className, 'criteria' => $query, 'object' => null)); } } } } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not get connection for writing data", '', __METHOD__, __FILE__, __LINE__); } return $affected; } /** * Remove an instance of the specified className by a supplied criteria. * * @param string $className The name of the class to remove an instance of. * @param mixed $criteria Valid xPDO criteria for selecting an instance. * @return boolean True if the instance is successfully removed. */ public function removeObject($className, $criteria) { $removed= false; if ($this->getConnection(array(xPDO::OPT_CONN_MUTABLE => true))) { if ($this->getCount($className, $criteria) === 1) { if ($query= $this->newQuery($className)) { $query->command('DELETE'); $query->where($criteria); if ($query->prepare()) { if ($this->exec($query->toSQL()) !== 1) { $this->log(xPDO::LOG_LEVEL_ERROR, "xPDO->removeObject - Error deleting {$className} instance using query " . $query->toSQL()); } else { $removed= true; if ($this->getOption(xPDO::OPT_CACHE_DB)) { $this->cacheManager->delete(xPDOCacheManager::CACHE_DIR . $query->getAlias(), array('multiple_object_delete' => true)); } $callback = $this->getOption(xPDO::OPT_CALLBACK_ON_REMOVE); if ($callback && is_callable($callback)) { call_user_func($callback, array('className' => $className, 'criteria' => $query)); } } } } } else { $this->log(xPDO::LOG_LEVEL_WARN, "xPDO->removeObject - {$className} instance to remove not found!"); if ($this->getDebug() === true) $this->log(xPDO::LOG_LEVEL_DEBUG, "xPDO->removeObject - {$className} instance to remove not found using criteria " . print_r($criteria, true)); } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not get connection for writing data", '', __METHOD__, __FILE__, __LINE__); } return $removed; } /** * Remove a collection of instances by the supplied className and criteria. * * @param string $className The name of the class to remove a collection of. * @param mixed $criteria Valid xPDO criteria for selecting a collection. * @return boolean|integer False if the remove encounters an error, otherwise an integer value * representing the number of rows that were removed. */ public function removeCollection($className, $criteria) { $removed= false; if ($this->getConnection(array(xPDO::OPT_CONN_MUTABLE => true))) { if ($query= $this->newQuery($className)) { $query->command('DELETE'); $query->where($criteria); if ($query->prepare()) { $removed= $this->exec($query->toSQL()); if ($removed === false) { $this->log(xPDO::LOG_LEVEL_ERROR, "xPDO->removeCollection - Error deleting {$className} instances using query " . $query->toSQL()); } else { if ($this->getOption(xPDO::OPT_CACHE_DB)) { $this->cacheManager->delete(xPDOCacheManager::CACHE_DIR . $query->getAlias(), array('multiple_object_delete' => true)); } $callback = $this->getOption(xPDO::OPT_CALLBACK_ON_REMOVE); if ($callback && is_callable($callback)) { call_user_func($callback, array('className' => $className, 'criteria' => $query)); } } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "xPDO->removeCollection - Error preparing statement to delete {$className} instances using query: {$query->toSQL()}"); } } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not get connection for writing data", '', __METHOD__, __FILE__, __LINE__); } return $removed; } /** * Retrieves a count of xPDOObjects by the specified xPDOCriteria. * * @param string $className Class of xPDOObject to count instances of. * @param mixed $criteria Any valid xPDOCriteria object or expression. * @return integer The number of instances found by the criteria. */ public function getCount($className, $criteria = null) { $count = 0; if ($query = $this->newQuery($className, $criteria)) { $stmt = null; $expr = '*'; if ($pk = $this->getPK($className)) { if (!is_array($pk)) { $pk = array($pk); } $expr = $this->getSelectColumns($className, $query->getAlias(), '', $pk); } if (isset($query->query['columns'])) { $query->query['columns'] = array(); } if (!empty($query->query['groupby']) || !empty($query->query['having'])) { $query->select($expr); if ($query->prepare()) { $countQuery = new xPDOCriteria($this, "SELECT COUNT(*) FROM ({$query->toSQL(false)}) cq", $query->bindings, $query->cacheFlag); $stmt = $countQuery->prepare(); } } else { $query->select(array("COUNT(DISTINCT {$expr})")); $stmt = $query->prepare(); } if ($stmt && $stmt->execute()) { $count = intval($stmt->fetchColumn()); } } return $count; } /** * Retrieves an xPDOObject instance with specified related objects. * * @uses xPDO::getCollectionGraph() * @param string $className The name of the class to return an instance of. * @param string|array $graph A related object graph in array or JSON * format, e.g. array('relationAlias'=>array('subRelationAlias'=>array())) * or {"relationAlias":{"subRelationAlias":{}}}. Note that the empty arrays * are necessary in order for the relation to be recognized. * @param mixed $criteria A valid xPDOCriteria instance or expression. * @param boolean|integer $cacheFlag Indicates if the result set should be * cached, and optionally for how many seconds. * @return object The object instance with related objects from the graph * hydrated, or null if no instance can be located by the criteria. */ public function getObjectGraph($className, $graph, $criteria= null, $cacheFlag= true) { $object= null; if ($collection= $this->getCollectionGraph($className, $graph, $criteria, $cacheFlag)) { if (!count($collection) === 1) { $this->log(xPDO::LOG_LEVEL_WARN, 'getObjectGraph criteria returned more than one instance.'); } $object= reset($collection); } return $object; } /** * Retrieves a collection of xPDOObject instances with related objects. * * @uses xPDOQuery::bindGraph() * @param string $className The name of the class to return a collection of. * @param string|array $graph A related object graph in array or JSON * format, e.g. array('relationAlias'=>array('subRelationAlias'=>array())) * or {"relationAlias":{"subRelationAlias":{}}}. Note that the empty arrays * are necessary in order for the relation to be recognized. * @param mixed $criteria A valid xPDOCriteria instance or condition string. * @param boolean $cacheFlag Indicates if the result set should be cached. * @return array An array of instances matching the criteria with related * objects from the graph hydrated. An empty array is returned when no * matches are found. */ public function getCollectionGraph($className, $graph, $criteria= null, $cacheFlag= true) { return $this->call($className, 'loadCollectionGraph', array(& $this, $className, $graph, $criteria, $cacheFlag)); } /** * Execute a PDOStatement and get a single column value from the first row of the result set. * * @param PDOStatement $stmt A prepared PDOStatement object ready to be executed. * @param null|integer $column 0-indexed number of the column you wish to retrieve from the row. If * null or no value is supplied, it fetches the first column. * @return mixed The value of the specified column from the first row of the result set, or null. */ public function getValue($stmt, $column= null) { $value = null; if (is_object($stmt) && $stmt instanceof PDOStatement) { $tstart = microtime(true); if ($stmt->execute()) { $this->queryTime += microtime(true) - $tstart; $this->executedQueries++; $value= $stmt->fetchColumn($column); $stmt->closeCursor(); } else { $this->queryTime += microtime(true) - $tstart; $this->executedQueries++; $this->log(xPDO::LOG_LEVEL_ERROR, "Error " . $stmt->errorCode() . " executing statement: \n" . print_r($stmt->errorInfo(), true), '', __METHOD__, __FILE__, __LINE__); } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "No valid PDOStatement provided to getValue", '', __METHOD__, __FILE__, __LINE__); } return $value; } /** * Convert any valid criteria into an xPDOQuery instance. * * @todo Get criteria pre-defined in an {@link xPDOObject} class metadata * definition by name. * * @todo Define callback functions as an alternative to retreiving criteria * sql and/or bindings from the metadata. * * @param string $className The class to get predefined criteria for. * @param string $type The type of criteria to get (you can define any * type you want, but 'object' and 'collection' are the typical criteria * for retrieving single and multiple instances of an object). * @param boolean|integer $cacheFlag Indicates if the result is cached and * optionally for how many seconds. * @return xPDOCriteria A criteria object or null if not found. */ public function getCriteria($className, $type= null, $cacheFlag= true) { return $this->newQuery($className, $type, $cacheFlag); } /** * Validate and return the type of a specified criteria variable. * * @param mixed $criteria An xPDOCriteria instance or any valid criteria variable. * @return string|null The type of valid criteria passed, or null if the criteria is not valid. */ public function getCriteriaType($criteria) { $type = gettype($criteria); if ($type === 'object') { $type = get_class($criteria); if (!$criteria instanceof xPDOCriteria) { $this->log(xPDO::LOG_LEVEL_WARN, "Invalid criteria object of class {$type} encountered.", '', __METHOD__, __FILE__, __LINE__); $type = null; } } return $type; } /** * Add criteria when requesting a derivative class row automatically. * * This applies class_key filtering for single-table inheritance queries and may * provide a convenient location for similar features in the future. * * @param string $className A valid xPDOObject derivative table class. * @param xPDOQuery $criteria A valid xPDOQuery instance. * @return xPDOQuery The xPDOQuery instance with derivative criteria added. */ public function addDerivativeCriteria($className, $criteria) { if ($criteria instanceof xPDOQuery && !isset($this->map[$className]['table'])) { if (isset($this->map[$className]['fields']['class_key']) && !empty($this->map[$className]['fields']['class_key'])) { $criteria->where(array('class_key' => $this->map[$className]['fields']['class_key'])); if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "#1: Automatically adding class_key criteria for derivative query of class {$className}"); } } else { foreach ($this->getAncestry($className, false) as $ancestor) { if (isset($this->map[$ancestor]['table']) && isset($this->map[$ancestor]['fields']['class_key'])) { $criteria->where(array('class_key' => $className)); if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "#2: Automatically adding class_key criteria for derivative query of class {$className} from base table class {$ancestor}"); } break; } } } } return $criteria; } /** * Gets the package name from a specified class name. * * @param string $className The name of the class to lookup the package for. * @return string The package the class belongs to. */ public function getPackage($className) { $package= ''; if ($className= $this->loadClass($className)) { if (isset($this->map[$className]['package'])) { $package= $this->map[$className]['package']; } if (!$package && $ancestry= $this->getAncestry($className, false)) { foreach ($ancestry as $ancestor) { if (isset ($this->map[$ancestor]['package']) && ($package= $this->map[$ancestor]['package'])) { break; } } } } return $package; } /** * Load and return a named service class instance. * * @param string $name The variable name of the instance. * @param string $class The service class name. * @param string $path An optional root path to search for the class. * @param array $params An array of optional params to pass to the service * class constructor. * @return object|null A reference to the service class instance or null if * it could not be loaded. */ public function &getService($name, $class= '', $path= '', $params= array ()) { $service= null; if (!isset ($this->services[$name]) || !is_object($this->services[$name])) { if (empty ($class) && isset ($this->config[$name . '.class'])) { $class= $this->config[$name . '.class']; } elseif (empty ($class)) { $class= $name; } $className= $this->loadClass($class, $path, false, true); if (!empty($className)) { $service = new $className ($this, $params); if ($service) { $this->services[$name]=& $service; $this->$name= & $this->services[$name]; } } } if (array_key_exists($name, $this->services)) { $service= & $this->services[$name]; } else { if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "Problem getting service {$name}, instance of class {$class}, from path {$path}, with params " . print_r($params, true)); } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Problem getting service {$name}, instance of class {$class}, from path {$path}"); } } return $service; } /** * Gets the actual run-time table name from a specified class name. * * @param string $className The name of the class to lookup a table name * for. * @param boolean $includeDb Qualify the table name with the database name. * @return string The table name for the class, or null if unsuccessful. */ public function getTableName($className, $includeDb= false) { $table= null; if ($className= $this->loadClass($className)) { if (isset ($this->map[$className]['table'])) { $table= $this->map[$className]['table']; if (isset($this->map[$className]['package']) && isset($this->packages[$this->map[$className]['package']]['prefix'])) { $table= $this->packages[$this->map[$className]['package']]['prefix'] . $table; } else { $table= $this->getOption(xPDO::OPT_TABLE_PREFIX, null, '') . $table; } } if (!$table && $ancestry= $this->getAncestry($className, false)) { foreach ($ancestry as $ancestor) { if (isset ($this->map[$ancestor]['table']) && $table= $this->map[$ancestor]['table']) { if (isset($this->map[$ancestor]['package']) && isset($this->packages[$this->map[$ancestor]['package']]['prefix'])) { $table= $this->packages[$this->map[$ancestor]['package']]['prefix'] . $table; } else { $table= $this->getOption(xPDO::OPT_TABLE_PREFIX, null, '') . $table; } break; } } } } if ($table) { $table= $this->_getFullTableName($table, $includeDb); if ($this->getDebug() === true) $this->log(xPDO::LOG_LEVEL_DEBUG, 'Returning table name: ' . $table . ' for class: ' . $className); } else { $this->log(xPDO::LOG_LEVEL_ERROR, 'Could not get table name for class: ' . $className); } return $table; } /** * Get the class which defines the table for a specified className. * * @param string $className The name of a class to determine the table class from. * @return null|string The name of a class defining the table for the specified className; null if not found. */ public function getTableClass($className) { $tableClass= null; if ($className= $this->loadClass($className)) { if (isset ($this->map[$className]['table'])) { $tableClass= $className; } if (!$tableClass && $ancestry= $this->getAncestry($className, false)) { foreach ($ancestry as $ancestor) { if (isset ($this->map[$ancestor]['table'])) { $tableClass= $ancestor; break; } } } } if ($tableClass) { if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, 'Returning table class: ' . $tableClass . ' for class: ' . $className); } } else { $this->log(xPDO::LOG_LEVEL_ERROR, 'Could not get table class for class: ' . $className); } return $tableClass; } /** * Gets the actual run-time table metadata from a specified class name. * * @param string $className The name of the class to lookup a table name * for. * @return string The table meta data for the class, or null if * unsuccessful. */ public function getTableMeta($className) { $tableMeta= null; if ($className= $this->loadClass($className)) { if (isset ($this->map[$className]['tableMeta'])) { $tableMeta= $this->map[$className]['tableMeta']; } if (!$tableMeta && $ancestry= $this->getAncestry($className)) { foreach ($ancestry as $ancestor) { if (isset ($this->map[$ancestor]['tableMeta'])) { if ($tableMeta= $this->map[$ancestor]['tableMeta']) { break; } } } } } return $tableMeta; } /** * Indicates the inheritance model for the xPDOObject class specified. * * @param string $className The class to determine the table inherit type from. * @return string single, multiple, or none */ public function getInherit($className) { $inherit= false; if ($className= $this->loadClass($className)) { if (isset ($this->map[$className]['inherit'])) { $inherit= $this->map[$className]['inherit']; } if (!$inherit && $ancestry= $this->getAncestry($className, false)) { foreach ($ancestry as $ancestor) { if (isset ($this->map[$ancestor]['inherit'])) { $inherit= $this->map[$ancestor]['inherit']; break; } } } } if (!empty($inherit)) { if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, 'Returning inherit: ' . $inherit . ' for class: ' . $className); } } else { $inherit= 'none'; } return $inherit; } /** * Gets a list of fields (or columns) for an object by class name. * * This includes default values for each field and is used by the objects * themselves to build their initial attributes based on class inheritence. * * @param string $className The name of the class to lookup fields for. * @return array An array featuring field names as the array keys, and * default field values as the array values; empty array is returned if * unsuccessful. */ public function getFields($className) { $fields= array (); if ($className= $this->loadClass($className)) { if ($ancestry= $this->getAncestry($className)) { for ($i= count($ancestry) - 1; $i >= 0; $i--) { if (isset ($this->map[$ancestry[$i]]['fields'])) { $fields= array_merge($fields, $this->map[$ancestry[$i]]['fields']); } } } if ($this->getInherit($className) === 'single') { $descendants= $this->getDescendants($className); if ($descendants) { foreach ($descendants as $descendant) { $descendantClass= $this->loadClass($descendant); if ($descendantClass && isset($this->map[$descendantClass]['fields'])) { $fields= array_merge($fields, array_diff_key($this->map[$descendantClass]['fields'], $fields)); } } } } } return $fields; } /** * Gets a list of field (or column) definitions for an object by class name. * * These definitions are used by the objects themselves to build their * own meta data based on class inheritance. * * @param string $className The name of the class to lookup fields meta data * for. * @param boolean $includeExtended If true, include meta from all derivative * classes in loaded packages. * @return array An array featuring field names as the array keys, and * arrays of metadata information as the array values; empty array is * returned if unsuccessful. */ public function getFieldMeta($className, $includeExtended = false) { $fieldMeta= array (); if ($className= $this->loadClass($className)) { if ($ancestry= $this->getAncestry($className)) { for ($i= count($ancestry) - 1; $i >= 0; $i--) { if (isset ($this->map[$ancestry[$i]]['fieldMeta'])) { $fieldMeta= array_merge($fieldMeta, $this->map[$ancestry[$i]]['fieldMeta']); } } } if ($includeExtended && $this->getInherit($className) === 'single') { $descendants= $this->getDescendants($className); if ($descendants) { foreach ($descendants as $descendant) { $descendantClass= $this->loadClass($descendant); if ($descendantClass && isset($this->map[$descendantClass]['fieldMeta'])) { $fieldMeta= array_merge($fieldMeta, array_diff_key($this->map[$descendantClass]['fieldMeta'], $fieldMeta)); } } } } } return $fieldMeta; } /** * Gets a collection of field aliases for an object by class name. * * @param string $className The name of the class to lookup field aliases for. * @return array An array of field aliases with aliases as keys and actual field names as values. */ public function getFieldAliases($className) { $fieldAliases= array (); if ($className= $this->loadClass($className)) { if ($ancestry= $this->getAncestry($className)) { for ($i= count($ancestry) - 1; $i >= 0; $i--) { if (isset ($this->map[$ancestry[$i]]['fieldAliases'])) { $fieldAliases= array_merge($fieldAliases, $this->map[$ancestry[$i]]['fieldAliases']); } } } if ($this->getInherit($className) === 'single') { $descendants= $this->getDescendants($className); if ($descendants) { foreach ($descendants as $descendant) { $descendantClass= $this->loadClass($descendant); if ($descendantClass && isset($this->map[$descendantClass]['fieldAliases'])) { $fieldAliases= array_merge($fieldAliases, array_diff_key($this->map[$descendantClass]['fieldAliases'], $fieldAliases)); } } } } } return $fieldAliases; } /** * Gets a set of validation rules defined for an object by class name. * * @param string $className The name of the class to lookup validation rules * for. * @return array An array featuring field names as the array keys, and * arrays of validation rule information as the array values; empty array is * returned if unsuccessful. */ public function getValidationRules($className) { $rules= array(); if ($className= $this->loadClass($className)) { if ($ancestry= $this->getAncestry($className)) { for ($i= count($ancestry) - 1; $i >= 0; $i--) { if (isset($this->map[$ancestry[$i]]['validation']['rules'])) { $rules= array_merge($rules, $this->map[$ancestry[$i]]['validation']['rules']); } } } if ($this->getInherit($className) === 'single') { $descendants= $this->getDescendants($className); if ($descendants) { foreach ($descendants as $descendant) { $descendantClass= $this->loadClass($descendant); if ($descendantClass && isset($this->map[$descendantClass]['validation']['rules'])) { $rules= array_merge($rules, array_diff_key($this->map[$descendantClass]['validation']['rules'], $rules)); } } } } if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "Returning validation rules: " . print_r($rules, true)); } } return $rules; } /** * Get indices defined for a table class. * * @param string $className The name of the class to lookup indices for. * @return array An array of indices and their details for the specified class. */ public function getIndexMeta($className) { $indices= array(); if ($className= $this->loadClass($className)) { if ($ancestry= $this->getAncestry($className)) { for ($i= count($ancestry) -1; $i >= 0; $i--) { if (isset($this->map[$ancestry[$i]]['indexes'])) { $indices= array_merge($indices, $this->map[$ancestry[$i]]['indexes']); } } if ($this->getInherit($className) === 'single') { $descendants= $this->getDescendants($className); if ($descendants) { foreach ($descendants as $descendant) { $descendantClass= $this->loadClass($descendant); if ($descendantClass && isset($this->map[$descendantClass]['indexes'])) { $indices= array_merge($indices, array_diff_key($this->map[$descendantClass]['indexes'], $indices)); } } } } if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "Returning indices: " . print_r($indices, true)); } } } return $indices; } /** * Gets the primary key field(s) for a class. * * @param string $className The name of the class to lookup the primary key * for. * @return mixed The name of the field representing a class instance primary * key, an array of key names for compound primary keys, or null if no * primary key is found or defined for the class. */ public function getPK($className) { $pk= null; if (strcasecmp($className, 'xPDOObject') !== 0) { if ($actualClassName= $this->loadClass($className)) { if (isset ($this->map[$actualClassName]['indexes'])) { foreach ($this->map[$actualClassName]['indexes'] as $k => $v) { if (isset ($this->map[$actualClassName]['fieldMeta'][$k]['phptype'])) { if (isset ($v['primary']) && $v['primary'] == true) { $pk[$k]= $k; } } } } if (isset ($this->map[$actualClassName]['fieldMeta'])) { foreach ($this->map[$actualClassName]['fieldMeta'] as $k => $v) { if (isset ($v['index']) && isset ($v['phptype']) && $v['index'] == 'pk') { $pk[$k]= $k; } } } if ($ancestry= $this->getAncestry($actualClassName)) { foreach ($ancestry as $ancestor) { if ($ancestorClassName= $this->loadClass($ancestor)) { if (isset ($this->map[$ancestorClassName]['indexes'])) { foreach ($this->map[$ancestorClassName]['indexes'] as $k => $v) { if (isset ($this->map[$ancestorClassName]['fieldMeta'][$k]['phptype'])) { if (isset ($v['primary']) && $v['primary'] == true) { $pk[$k]= $k; } } } } if (isset ($this->map[$ancestorClassName]['fieldMeta'])) { foreach ($this->map[$ancestorClassName]['fieldMeta'] as $k => $v) { if (isset ($v['index']) && isset ($v['phptype']) && $v['index'] == 'pk') { $pk[$k]= $k; } } } } } } if ($pk && count($pk) === 1) { $pk= current($pk); } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not load class {$className}"); } } return $pk; } /** * Gets the type of primary key field for a class. * * @param string $className The name of the class to lookup the primary key * type for. * @param mixed $pk Optional specific PK column or columns to get type(s) for. * @return string The type of the field representing a class instance primary * key, or null if no primary key is found or defined for the class. */ public function getPKType($className, $pk= false) { $pktype= null; if ($actualClassName= $this->loadClass($className)) { if (!$pk) $pk= $this->getPK($actualClassName); if (!is_array($pk)) $pk= array($pk); $ancestry= $this->getAncestry($actualClassName, true); foreach ($pk as $_pk) { foreach ($ancestry as $parentClass) { if (isset ($this->map[$parentClass]['fieldMeta'][$_pk]['phptype'])) { $pktype[$_pk]= $this->map[$parentClass]['fieldMeta'][$_pk]['phptype']; break; } } } if (is_array($pktype) && count($pktype) == 1) { $pktype= reset($pktype); } elseif (empty($pktype)) { $pktype= null; } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not load class {$className}!"); } return $pktype; } /** * Gets a collection of aggregate foreign key relationship definitions. * * @param string $className The fully-qualified name of the class. * @return array An array of aggregate foreign key relationship definitions. */ public function getAggregates($className) { $aggregates= array (); if ($className= $this->loadClass($className)) { if ($ancestry= $this->getAncestry($className)) { for ($i= count($ancestry) - 1; $i >= 0; $i--) { if (isset ($this->map[$ancestry[$i]]['aggregates'])) { $aggregates= array_merge($aggregates, $this->map[$ancestry[$i]]['aggregates']); } } } if ($this->getInherit($className) === 'single') { $descendants= $this->getDescendants($className); if ($descendants) { foreach ($descendants as $descendant) { $descendantClass= $this->loadClass($descendant); if ($descendantClass && isset($this->map[$descendantClass]['aggregates'])) { $aggregates= array_merge($aggregates, array_diff_key($this->map[$descendantClass]['aggregates'], $aggregates)); } } } } } return $aggregates; } /** * Gets a collection of composite foreign key relationship definitions. * * @param string $className The fully-qualified name of the class. * @return array An array of composite foreign key relationship definitions. */ public function getComposites($className) { $composites= array (); if ($className= $this->loadClass($className)) { if ($ancestry= $this->getAncestry($className)) { for ($i= count($ancestry) - 1; $i >= 0; $i--) { if (isset ($this->map[$ancestry[$i]]['composites'])) { $composites= array_merge($composites, $this->map[$ancestry[$i]]['composites']); } } } if ($this->getInherit($className) === 'single') { $descendants= $this->getDescendants($className); if ($descendants) { foreach ($descendants as $descendant) { $descendantClass= $this->loadClass($descendant); if ($descendantClass && isset($this->map[$descendantClass]['composites'])) { $composites= array_merge($composites, array_diff_key($this->map[$descendantClass]['composites'], $composites)); } } } } } return $composites; } /** * Get a complete relation graph for an xPDOObject class. * * @param string $className A fully-qualified xPDOObject class name. * @param int $depth The depth to retrieve relations for the graph, defaults to 3. * @param array &$parents An array of parent classes to avoid traversing circular dependencies. * @param array &$visited An array of already visited classes to avoid traversing circular dependencies. * @return array An xPDOObject relation graph, or an empty array if no graph can be constructed. */ public function getGraph($className, $depth= 3, &$parents = array(), &$visited = array()) { $graph = array(); $className = $this->loadClass($className); if ($className && $depth > 0) { $depth--; $parents = array_merge($parents, $this->getAncestry($className)); $parentsNested = array_unique($parents); $visitNested = array_merge($visited, array($className)); $relations = array_merge($this->getAggregates($className), $this->getComposites($className)); foreach ($relations as $alias => $relation) { if (in_array($relation['class'], $visited)) { continue; } $childGraph = array(); if ($depth > 0 && !in_array($relation['class'], $parents)) { $childGraph = $this->getGraph($relation['class'], $depth, $parentsNested, $visitNested); } $graph[$alias] = $childGraph; } $visited[] = $className; } return $graph; } /** * Retrieves the complete ancestry for a class. * * @param string $className The name of the class. * @param bool $includeSelf Determines if the specified class should be * included in the resulting array. * @return array An array of string class names representing the class * hierarchy, or an empty array if unsuccessful. */ public function getAncestry($className, $includeSelf= true) { $ancestry= array (); if ($actualClassName= $this->loadClass($className)) { $ancestor= $actualClassName; if ($includeSelf) { $ancestry[]= $actualClassName; } while ($ancestor= get_parent_class($ancestor)) { $ancestry[]= $ancestor; } if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "Returning ancestry for {$className}: " . print_r($ancestry, 1)); } } return $ancestry; } /** * Gets select columns from a specific class for building a query. * * @uses xPDOObject::getSelectColumns() * @param string $className The name of the class to build the column list * from. * @param string $tableAlias An optional alias for the class table, to be * used in complex queries with multiple tables. * @param string $columnPrefix An optional string with which to prefix the * columns returned, to avoid name collisions in return columns. * @param array $columns An optional array of columns to include. * @param boolean $exclude If true, will exclude columns in the previous * parameter, instead of including them. * @return string A valid SQL string of column names for a SELECT statement. */ public function getSelectColumns($className, $tableAlias= '', $columnPrefix= '', $columns= array (), $exclude= false) { return $this->call($className, 'getSelectColumns', array(&$this, $className, $tableAlias, $columnPrefix, $columns, $exclude)); } /** * Gets an aggregate or composite relation definition from a class. * * @param string $parentClass The class from which the relation is defined. * @param string $alias The alias identifying the related class. * @return array The aggregate or composite definition details in an array * or null if no definition is found. */ function getFKDefinition($parentClass, $alias) { $def= null; $parentClass= $this->loadClass($parentClass); if ($parentClass && $alias) { if ($aggregates= $this->getAggregates($parentClass)) { if (isset ($aggregates[$alias])) { $def= $aggregates[$alias]; $def['type']= 'aggregate'; } } if ($composites= $this->getComposites($parentClass)) { if (isset ($composites[$alias])) { $def= $composites[$alias]; $def['type']= 'composite'; } } } if ($def === null) { $this->log(xPDO::LOG_LEVEL_ERROR, 'No foreign key definition for parentClass: ' . $parentClass . ' using relation alias: ' . $alias); } return $def; } /** * Gets the version string of the schema the specified class was generated from. * * @param string $className The name of the class to get the model version from. * @return string The version string for the schema model the class was generated from. */ public function getModelVersion($className) { $version = '1.0'; $className= $this->loadClass($className); if ($className && isset($this->map[$className]['version'])) { $version= $this->map[$className]['version']; } return $version; } /** * Gets the manager class for this xPDO connection. * * The manager class can perform operations such as creating or altering * table structures, creating data containers, generating custom persistence * classes, and other advanced operations that do not need to be loaded * frequently. * * @return xPDOManager|null An xPDOManager instance for the xPDO connection, or null * if a manager class can not be instantiated. */ public function getManager() { if ($this->manager === null || !$this->manager instanceof xPDOManager) { $loaded= include_once(XPDO_CORE_PATH . 'om/' . $this->config['dbtype'] . '/xpdomanager.class.php'); if ($loaded) { $managerClass = 'xPDOManager_' . $this->config['dbtype']; $this->manager= new $managerClass ($this); } if (!$this->manager) { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not load xPDOManager class."); } } return $this->manager; } /** * Gets the driver class for this xPDO connection. * * The driver class provides baseline data and operations for a specific database driver. * * @return xPDODriver|null An xPDODriver instance for the xPDO connection, or null * if a driver class can not be instantiated. */ public function getDriver() { if ($this->driver === null || !$this->driver instanceof xPDODriver) { $loaded= include_once(XPDO_CORE_PATH . 'om/' . $this->config['dbtype'] . '/xpdodriver.class.php'); if ($loaded) { $driverClass = 'xPDODriver_' . $this->config['dbtype']; $this->driver= new $driverClass ($this); } if (!$this->driver) { $this->log(xPDO::LOG_LEVEL_ERROR, "Could not load xPDODriver class for the {$this->config['dbtype']} PDO driver. " . print_r($this->config, true)); } } return $this->driver; } /** * Gets the absolute path to the cache directory. * * @return string The full cache directory path. */ public function getCachePath() { if (!$this->cachePath) { if ($this->getCacheManager()) { $this->cachePath= $this->cacheManager->getCachePath(); } } return $this->cachePath; } /** * Gets an xPDOCacheManager instance. * * This class is responsible for handling all types of caching operations for the xPDO core. * * @param string $class Optional name of a derivative xPDOCacheManager class. * @param array $options An array of options for the cache manager instance; valid options include: * - path = Optional root path for looking up the $class. * - ignorePkg = If false and you do not specify a path, you can look up custom xPDOCacheManager * derivatives in declared packages. * @return xPDOCacheManager The xPDOCacheManager for this xPDO instance. */ public function getCacheManager($class= 'cache.xPDOCacheManager', $options = array('path' => XPDO_CORE_PATH, 'ignorePkg' => true)) { $actualClass = $this->loadClass($class, $options['path'], $options['ignorePkg'], true); if ($this->cacheManager === null || !is_object($this->cacheManager) || !($this->cacheManager instanceof $actualClass)) { if ($this->cacheManager= new $actualClass($this, $options)) { $this->_cacheEnabled= true; } } return $this->cacheManager; } /** * Returns the debug state for the xPDO instance. * * @return boolean The current debug state for the instance, true for on, * false for off. */ public function getDebug() { return $this->_debug; } /** * Sets the debug state for the xPDO instance. * * @param boolean|integer $v The debug status, true for on, false for off, or a valid * error_reporting level for PHP. */ public function setDebug($v= true) { $this->_debug= $v; } /** * Sets the logging level state for the xPDO instance. * * @param integer $level The logging level to switch to. * @return integer The previous log level. */ public function setLogLevel($level= xPDO::LOG_LEVEL_FATAL) { $oldLevel = $this->logLevel; $this->logLevel= intval($level); return $oldLevel; } /** * @return integer The current log level. */ public function getLogLevel() { return $this->logLevel; } /** * Sets the log target for xPDO::_log() calls. * * Valid target values include: * <ul> * <li>'ECHO': Returns output to the STDOUT.</li> * <li>'HTML': Returns output to the STDOUT with HTML formatting.</li> * <li>'FILE': Sends output to a log file.</li> * <li>An array with at least one element with key 'target' matching * one of the valid log targets listed above. For 'target' => 'FILE' * you can specify a second element with key 'options' with another * associative array with one or both of the elements 'filename' and * 'filepath'</li> * </ul> * * @param string $target An identifier indicating the target of the logging. * @return mixed The previous log target. */ public function setLogTarget($target= 'ECHO') { $oldTarget = $this->logTarget; $this->logTarget= $target; return $oldTarget; } /** * @return integer The current log level. */ public function getLogTarget() { return $this->logTarget; } /** * Log a message with details about where and when an event occurs. * * @param integer $level The level of the logged message. * @param string $msg The message to log. * @param string $target The logging target. * @param string $def The name of a defining structure (such as a class) to * help identify the message source. * @param string $file A filename in which the log event occured. * @param string $line A line number to help locate the source of the event * within the indicated file. */ public function log($level, $msg, $target= '', $def= '', $file= '', $line= '') { $this->_log($level, $msg, $target, $def, $file, $line); } /** * Log a message as appropriate for the level and target. * * @param integer $level The level of the logged message. * @param string $msg The message to log. * @param string $target The logging target. * @param string $def The name of a defining structure (such as a class) to * help identify the log event source. * @param string $file A filename in which the log event occured. * @param string $line A line number to help locate the source of the event * within the indicated file. */ protected function _log($level, $msg, $target= '', $def= '', $file= '', $line= '') { if (empty ($target)) { $target = $this->logTarget; } $targetOptions = array(); if (is_array($target)) { if (isset($target['options'])) $targetOptions =& $target['options']; $target = isset($target['target']) ? $target['target'] : 'ECHO'; } if (empty($file) && isset($_SERVER['SCRIPT_NAME'])) { $file= $_SERVER['SCRIPT_NAME']; } if ($level === xPDO::LOG_LEVEL_FATAL) { while (ob_get_level() && @ob_end_flush()) {} exit ('[' . strftime('%Y-%m-%d %H:%M:%S') . '] (' . $this->_getLogLevel($level) . $def . $file . $line . ') ' . $msg . "\n" . ($this->getDebug() === true ? '<pre>' . "\n" . print_r(debug_backtrace(), true) . "\n" . '</pre>' : '')); } if ($this->_debug === true || $level <= $this->logLevel) { @ob_start(); if (!empty ($def)) { $def= " in {$def}"; } if (!empty ($file)) { $file= " @ {$file}"; } if (!empty ($line)) { $line= " : {$line}"; } switch ($target) { case 'HTML' : echo '<h5>[' . strftime('%Y-%m-%d %H:%M:%S') . '] (' . $this->_getLogLevel($level) . $def . $file . $line . ')</h5><pre>' . $msg . '</pre>' . "\n"; break; default : echo '[' . strftime('%Y-%m-%d %H:%M:%S') . '] (' . $this->_getLogLevel($level) . $def . $file . $line . ') ' . $msg . "\n"; } $content= @ob_get_contents(); @ob_end_clean(); if ($target=='FILE' && $this->getCacheManager()) { $filename = isset($targetOptions['filename']) ? $targetOptions['filename'] : 'error.log'; $filepath = isset($targetOptions['filepath']) ? $targetOptions['filepath'] : $this->getCachePath() . xPDOCacheManager::LOG_DIR; $this->cacheManager->writeFile($filepath . $filename, $content, 'a'); } elseif ($target=='ARRAY' && isset($targetOptions['var']) && is_array($targetOptions['var'])) { $targetOptions['var'][] = $content; } else { echo $content; } } } /** * Returns an abbreviated backtrace of debugging information. * * This function returns just the fields returned via xPDOObject::toArray() * on xPDOObject instances, and simply the classname for other objects, to * reduce the amount of unnecessary information returned. * * @return array The abbreviated backtrace. */ public function getDebugBacktrace() { $backtrace= array (); foreach (debug_backtrace() as $levelKey => $levelElement) { foreach ($levelElement as $traceKey => $traceElement) { if ($traceKey == 'object' && $traceElement instanceof xPDOObject) { $backtrace[$levelKey][$traceKey]= $traceElement->toArray('', true); } elseif ($traceKey == 'object') { $backtrace[$levelKey][$traceKey]= get_class($traceElement); } else { $backtrace[$levelKey][$traceKey]= $traceElement; } } } return $backtrace; } /** * Gets a logging level as a string representation. * * @param integer $level The logging level to retrieve a string for. * @return string The string representation of a valid logging level. */ protected function _getLogLevel($level) { switch ($level) { case xPDO::LOG_LEVEL_DEBUG : $levelText= 'DEBUG'; break; case xPDO::LOG_LEVEL_INFO : $levelText= 'INFO'; break; case xPDO::LOG_LEVEL_WARN : $levelText= 'WARN'; break; case xPDO::LOG_LEVEL_ERROR : $levelText= 'ERROR'; break; default : $levelText= 'FATAL'; } return $levelText; } /** * Escapes the provided string using the platform-specific escape character. * * Different database engines escape string literals in SQL using different characters. For example, this is used to * escape column names that might match a reserved string for that SQL interpreter. To write database agnostic * queries with xPDO, it is highly recommend to escape any database or column names in any native SQL strings used. * * @param string $string A string to escape using the platform-specific escape characters. * @return string The string escaped with the platform-specific escape characters. */ public function escape($string) { $string = trim($string, $this->_escapeCharOpen . $this->_escapeCharClose); return $this->_escapeCharOpen . $string . $this->_escapeCharClose; } /** * Use to insert a literal string into a SQL query without escaping or quoting. * * @param string $string A string to return as a literal, unescaped and unquoted. * @return string The string with any escape or quote characters trimmed. */ public function literal($string) { $string = trim($string, $this->_escapeCharOpen . $this->_escapeCharClose . $this->_quoteChar); return $string; } /** * Adds the table prefix, and optionally database name, to a given table. * * @param string $baseTableName The table name as specified in the object * model. * @param boolean $includeDb Qualify the table name with the database name. * @return string The fully-qualified and quoted table name for the */ private function _getFullTableName($baseTableName, $includeDb= false) { $fqn= ''; if (!empty ($baseTableName)) { if ($includeDb) { $fqn .= $this->escape($this->config['dbname']) . '.'; } $fqn .= $this->escape($baseTableName); } return $fqn; } /** * Parses a DSN and returns an array of the connection details. * * @static * @param string $string The DSN to parse. * @return array An array of connection details from the DSN. * @todo Have this method handle all methods of DSN specification as handled * by latest native PDO implementation. */ public static function parseDSN($string) { $result= array (); $pos= strpos($string, ':'); $result['dbtype']= strtolower(substr($string, 0, $pos)); $parameters= explode(';', substr($string, ($pos +1))); for ($a= 0, $b= count($parameters); $a < $b; $a++) { $tmp= explode('=', $parameters[$a]); if (count($tmp) == 2) { $result[strtolower(trim($tmp[0]))]= trim($tmp[1]); } else { $result['dbname']= trim($parameters[$a]); } } if (!isset($result['dbname']) && isset($result['database'])) { $result['dbname'] = $result['database']; } if (!isset($result['host']) && isset($result['server'])) { $result['host'] = $result['server']; } return $result; } /** * Retrieves a result array from the object cache. * * @param string|xPDOCriteria $signature A unique string or xPDOCriteria object * that represents the query identifying the result set. * @param string $class An optional classname the result represents. * @param array $options Various cache options. * @return array|string|null A PHP array or JSON object representing the * result set, or null if no cache representation is found. */ public function fromCache($signature, $class= '', $options= array()) { $result= null; if ($this->getOption(xPDO::OPT_CACHE_DB, $options)) { if ($signature && $this->getCacheManager()) { $sig= ''; $sigKey= array(); $sigHash= ''; $sigClass= empty($class) || !is_string($class) ? '' : $class; if (is_object($signature)) { if ($signature instanceof xPDOCriteria) { if ($signature instanceof xPDOQuery) { $signature->construct(); if (empty($sigClass)) $sigClass= $signature->getTableClass(); } $sigKey= array ($signature->sql, $signature->bindings); } } elseif (is_string($signature)) { if ($exploded= explode('_', $signature)) { $class= reset($exploded); if (empty($sigClass) || $sigClass !== $class) { $sigClass= $class; } if (empty($sigKey)) { while ($key= next($exploded)) { $sigKey[]= $key; } } } } if (empty($sigClass)) $sigClass= '__sqlResult'; if ($sigClass && $sigKey) { $sigHash= md5($this->toJSON($sigKey)); $sig= implode('/', array ($sigClass, $sigHash)); } if (is_string($sig) && !empty($sig)) { $result= $this->cacheManager->get($sig, array( xPDO::OPT_CACHE_KEY => $this->getOption('cache_db_key', $options, 'db'), xPDO::OPT_CACHE_HANDLER => $this->getOption(xPDO::OPT_CACHE_DB_HANDLER, $options, $this->getOption(xPDO::OPT_CACHE_HANDLER, $options, 'cache.xPDOFileCache')), xPDO::OPT_CACHE_FORMAT => (integer) $this->getOption('cache_db_format', null, $this->getOption(xPDO::OPT_CACHE_FORMAT, null, xPDOCacheManager::CACHE_PHP)), 'cache_prefix' => $this->getOption('cache_db_prefix', $options, xPDOCacheManager::CACHE_DIR), )); if ($this->getDebug() === true) { if (!$result) { $this->log(xPDO::LOG_LEVEL_DEBUG, 'No cache item found for class ' . $sigClass . ' with signature ' . xPDOCacheManager::CACHE_DIR . $sig); } else { $this->log(xPDO::LOG_LEVEL_DEBUG, 'Loaded cache item for class ' . $sigClass . ' with signature ' . xPDOCacheManager::CACHE_DIR . $sig); } } } } } return $result; } /** * Places a result set in the object cache. * * @param string|xPDOCriteria $signature A unique string or xPDOCriteria object * representing the object. * @param object $object An object to place a representation of in the cache. * @param integer $lifetime An optional number of seconds the cached result * will remain valid, with 0 meaning it will remain valid until replaced or * removed. * @param array $options Various cache options. * @return boolean Indicates if the object was successfully cached. */ public function toCache($signature, $object, $lifetime= 0, $options = array()) { $result= false; if ($this->getCacheManager()) { if ($this->getOption(xPDO::OPT_CACHE_DB, $options)) { if ($lifetime === true) { $lifetime = 0; } elseif (!$lifetime && $this->getOption(xPDO::OPT_CACHE_DB_EXPIRES, $options, 0)) { $lifetime= intval($this->getOption(xPDO::OPT_CACHE_DB_EXPIRES, $options, 0)); } $sigKey= array(); $sigClass= ''; $sigGraph= $this->getOption(xPDO::OPT_CACHE_DB_SIG_GRAPH, $options, array()); if (is_object($signature)) { if ($signature instanceof xPDOCriteria) { if ($signature instanceof xPDOQuery) { $signature->construct(); if (empty($sigClass)) $sigClass = $signature->getTableClass(); } $sigKey= array($signature->sql, $signature->bindings); } } elseif (is_string($signature)) { $exploded= explode('_', $signature); if ($exploded && count($exploded) >= 2) { $class= reset($exploded); if (empty($sigClass) || $sigClass !== $class) { $sigClass= $class; } if (empty($sigKey)) { while ($key= next($exploded)) { $sigKey[]= $key; } } } } if (empty($sigClass)) { if ($object instanceof xPDOObject) { $sigClass= $object->_class; } else { $sigClass= $this->getOption(xPDO::OPT_CACHE_DB_SIG_CLASS, $options, '__sqlResult'); } } if (empty($sigKey) && is_string($signature)) $sigKey= $signature; if (empty($sigKey) && $object instanceof xPDOObject) $sigKey= $object->getPrimaryKey(); if ($sigClass && $sigKey) { $sigHash= md5($this->toJSON(is_array($sigKey) ? $sigKey : array($sigKey))); $sig= implode('/', array ($sigClass, $sigHash)); if (is_string($sig)) { if ($this->getOption('modified', $options, false)) { if (empty($sigGraph) && $object instanceof xPDOObject) { $sigGraph = array_merge(array($object->_class => array('class' => $object->_class)), $object->_aggregates, $object->_composites); } if (!empty($sigGraph)) { foreach ($sigGraph as $gAlias => $gMeta) { $gClass = $gMeta['class']; $removed= $this->cacheManager->delete($gClass, array_merge($options, array( xPDO::OPT_CACHE_KEY => $this->getOption('cache_db_key', $options, 'db'), xPDO::OPT_CACHE_HANDLER => $this->getOption(xPDO::OPT_CACHE_DB_HANDLER, $options, $this->getOption(xPDO::OPT_CACHE_HANDLER, $options, 'cache.xPDOFileCache')), xPDO::OPT_CACHE_FORMAT => (integer) $this->getOption('cache_db_format', $options, $this->getOption(xPDO::OPT_CACHE_FORMAT, $options, xPDOCacheManager::CACHE_PHP)), xPDO::OPT_CACHE_EXPIRES => (integer) $this->getOption(xPDO::OPT_CACHE_DB_EXPIRES, null, $this->getOption(xPDO::OPT_CACHE_EXPIRES, null, 0)), xPDO::OPT_CACHE_PREFIX => $this->getOption('cache_db_prefix', $options, xPDOCacheManager::CACHE_DIR), 'multiple_object_delete' => true ))); if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "Removing all cache objects of class {$gClass}: " . ($removed ? 'successful' : 'failed')); } } } } $cacheOptions = array_merge($options, array( xPDO::OPT_CACHE_KEY => $this->getOption('cache_db_key', $options, 'db'), xPDO::OPT_CACHE_HANDLER => $this->getOption(xPDO::OPT_CACHE_DB_HANDLER, $options, $this->getOption(xPDO::OPT_CACHE_HANDLER, $options, 'cache.xPDOFileCache')), xPDO::OPT_CACHE_FORMAT => (integer) $this->getOption('cache_db_format', $options, $this->getOption(xPDO::OPT_CACHE_FORMAT, $options, xPDOCacheManager::CACHE_PHP)), xPDO::OPT_CACHE_EXPIRES => (integer) $this->getOption(xPDO::OPT_CACHE_DB_EXPIRES, null, $this->getOption(xPDO::OPT_CACHE_EXPIRES, null, 0)), xPDO::OPT_CACHE_PREFIX => $this->getOption('cache_db_prefix', $options, xPDOCacheManager::CACHE_DIR) )); $result= $this->cacheManager->set($sig, $object, $lifetime, $cacheOptions); if ($result && $object instanceof xPDOObject) { if ($this->getDebug() === true) { $this->log(xPDO::LOG_LEVEL_DEBUG, "xPDO->toCache() successfully cached object with signature " . xPDOCacheManager::CACHE_DIR . $sig); } } if (!$result) { $this->log(xPDO::LOG_LEVEL_WARN, "xPDO->toCache() could not cache object with signature " . xPDOCacheManager::CACHE_DIR . $sig); } } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Object sent toCache() has an invalid signature."); } } } else { $this->log(xPDO::LOG_LEVEL_ERROR, "Attempt to send a non-object to toCache()."); } return $result; } /** * Converts a PHP array into a JSON encoded string. * * @param array $array The PHP array to convert. * @return string The JSON representation of the source array. */ public function toJSON($array) { $encoded= ''; if (is_array ($array)) { if (!function_exists('json_encode')) { if (@ include_once (XPDO_CORE_PATH . 'json/JSON.php')) { $json = new Services_JSON(); $encoded= $json->encode($array); } } else { $encoded= json_encode($array); } } return $encoded; } /** * Converts a JSON source string into an equivalent PHP representation. * * @param string $src A JSON source string. * @param boolean $asArray Indicates if the result should treat objects as * associative arrays; since all JSON associative arrays are objects, the default * is true. Set to false to have JSON objects returned as PHP objects. * @return mixed The PHP representation of the JSON source. */ public function fromJSON($src, $asArray= true) { $decoded= ''; if ($src) { if (!function_exists('json_decode')) { if (@ include_once (XPDO_CORE_PATH . 'json/JSON.php')) { if ($asArray) { $json = new Services_JSON(SERVICES_JSON_LOOSE_TYPE); } else { $json = new Services_JSON(); } $decoded= $json->decode($src); } } else { $decoded= json_decode($src, $asArray); } } return $decoded; } /** * @see http://php.net/manual/en/function.pdo-begintransaction.php */ public function beginTransaction() { if (!$this->connect(null, array(xPDO::OPT_CONN_MUTABLE => true))) { return false; } return $this->pdo->beginTransaction(); } /** * @see http://php.net/manual/en/function.pdo-commit.php */ public function commit() { if (!$this->connect(null, array(xPDO::OPT_CONN_MUTABLE => true))) { return false; } return $this->pdo->commit(); } /** * @see http://php.net/manual/en/function.pdo-exec.php */ public function exec($query) { if (!$this->connect(null, array(xPDO::OPT_CONN_MUTABLE => true))) { return false; } $tstart= microtime(true); $return= $this->pdo->exec($query); $this->queryTime += microtime(true) - $tstart; $this->executedQueries++; return $return; } /** * @see http://php.net/manual/en/function.pdo-errorcode.php */ public function errorCode() { if (!$this->connect()) { return false; } return $this->pdo->errorCode(); } /** * @see http://php.net/manual/en/function.pdo-errorinfo.php */ public function errorInfo() { if (!$this->connect()) { return false; } return $this->pdo->errorInfo(); } /** * @see http://php.net/manual/en/function.pdo-getattribute.php */ public function getAttribute($attribute) { if (!$this->connect()) { return false; } return $this->pdo->getAttribute($attribute); } /** * @see http://php.net/manual/en/function.pdo-lastinsertid.php */ public function lastInsertId() { if (!$this->connect()) { return false; } return $this->pdo->lastInsertId(); } /** * @see http://php.net/manual/en/function.pdo-prepare.php */ public function prepare($statement, $driver_options= array ()) { if (!$this->connect()) { return false; } return $this->pdo->prepare($statement, $driver_options); } /** * @see http://php.net/manual/en/function.pdo-query.php */ public function query($query) { if (!$this->connect()) { return false; } $tstart= microtime(true); $return= $this->pdo->query($query); $this->queryTime += microtime(true) - $tstart; $this->executedQueries++; return $return; } /** * @see http://php.net/manual/en/function.pdo-quote.php */ public function quote($string, $parameter_type= PDO::PARAM_STR) { if (!$this->connect()) { return false; } $quoted = $this->pdo->quote($string, $parameter_type); switch ($parameter_type) { case PDO::PARAM_STR: $quoted = trim($quoted); break; case PDO::PARAM_INT: $quoted = trim($quoted); $quoted = (integer) trim($quoted, "'"); break; default: break; } return $quoted; } /** * @see http://php.net/manual/en/function.pdo-rollback.php */ public function rollBack() { if (!$this->connect(null, array(xPDO::OPT_CONN_MUTABLE => true))) { return false; } return $this->pdo->rollBack(); } /** * @see http://php.net/manual/en/function.pdo-setattribute.php */ public function setAttribute($attribute, $value) { if (!$this->connect()) { return false; } return $this->pdo->setAttribute($attribute, $value); } /** * Creates an new xPDOQuery for a specified xPDOObject class. * * @param string $class The class to create the xPDOQuery for. * @param mixed $criteria Any valid xPDO criteria expression. * @param boolean|integer $cacheFlag Indicates if the result should be cached * and optionally for how many seconds (if passed an integer greater than 0). * @return xPDOQuery The resulting xPDOQuery instance or false if unsuccessful. */ public function newQuery($class, $criteria= null, $cacheFlag= true) { $query= false; if ($this->loadClass($this->config['dbtype'] . '.xPDOQuery', '', false, true)) { $xpdoQueryClass= 'xPDOQuery_' . $this->config['dbtype']; if (!class_exists($xpdoQueryClass, false)) include_once dirname(__FILE__) . '/om/' . $this->config['dbtype'] . '/xpdoquery.class.php'; if ($query= new $xpdoQueryClass($this, $class, $criteria)) { $query->cacheFlag= $cacheFlag; } } return $query; } /** * Splits a string on a specified character, ignoring escaped content. * * @static * @param string $char A character to split the tag content on. * @param string $str The string to operate on. * @param string $escToken A character used to surround escaped content; all * content within a pair of these tokens will be ignored by the split * operation. * @param integer $limit Limit the number of results. Default is 0 which is * no limit. Note that setting the limit to 1 will only return the content * up to the first instance of the split character and will discard the * remainder of the string. * @return array An array of results from the split operation, or an empty * array. */ public static function escSplit($char, $str, $escToken = '`', $limit = 0) { $split= array(); $charPos = strpos($str, $char); if ($charPos !== false) { if ($charPos === 0) { $searchPos = 1; $startPos = 1; } else { $searchPos = 0; $startPos = 0; } $escOpen = false; $strlen = strlen($str); for ($i = $startPos; $i <= $strlen; $i++) { if ($i == $strlen) { $tmp= trim(substr($str, $searchPos)); if (!empty($tmp)) $split[]= $tmp; break; } if ($str[$i] == $escToken) { $escOpen = $escOpen == true ? false : true; continue; } if (!$escOpen && $str[$i] == $char) { $tmp= trim(substr($str, $searchPos, $i - $searchPos)); if (!empty($tmp)) { $split[]= $tmp; if ($limit > 0 && count($split) >= $limit) { break; } } $searchPos = $i + 1; } } } else { $split[]= trim($str); } return $split; } /** * Parses parameter bindings in SQL prepared statements. * * @param string $sql A SQL prepared statement to parse bindings in. * @param array $bindings An array of parameter bindings to use for the replacements. * @return string The SQL with the binding placeholders replaced. */ public function parseBindings($sql, $bindings) { if (!empty($sql) && !empty($bindings)) { reset($bindings); $bound = array(); while (list ($k, $param)= each($bindings)) { if (!is_array($param)) { $v= $param; $type= $this->getPDOType($param); $bindings[$k]= array( 'value' => $v, 'type' => $type ); } else { $v= $param['value']; $type= $param['type']; } if (!$v) { switch ($type) { case PDO::PARAM_INT: $v= '0'; break; case PDO::PARAM_BOOL: $v= '0'; break; default: break; } } if ($type > 0) { $v= $this->quote($v, $type); } else { $v= 'NULL'; } if (!is_int($k) || substr($k, 0, 1) === ':') { $pattern= '/' . $k . '\b/'; $bound[$pattern] = str_replace(array('\\', '$'), array('\\\\', '\$'), $v); } else { $pattern = '/(\?)(\b)?/'; $sql = preg_replace($pattern, ':' . $k . '$2', $sql, 1); $bound['/:' . $k . '\b/'] = str_replace(array('\\', '$'), array('\\\\', '\$'), $v); } } $this->log(xPDO::LOG_LEVEL_INFO, "{$sql}\n" . print_r($bound, true)); if (!empty($bound)) { $sql= preg_replace(array_keys($bound), array_values($bound), $sql); } } return $sql; } /** * Get the appropriate PDO::PARAM_ type constant from a PHP value. * * @param mixed $value Any PHP scalar or null value * @return int|null */ public function getPDOType($value) { $type= null; if (is_null($value)) $type= PDO::PARAM_NULL; elseif (is_scalar($value)) { if (is_int($value)) $type= PDO::PARAM_INT; else $type= PDO::PARAM_STR; } return $type; } } /** * Encapsulates a SQL query into a PDOStatement with a set of bindings. * * @package xpdo * */ class xPDOCriteria { public $sql= ''; public $stmt= null; public $bindings= array (); public $cacheFlag= false; /** * The constructor for a new xPDOCriteria instance. * * The constructor optionally prepares provided SQL and/or parameter * bindings. Setting the bindings via the constructor or with the {@link * xPDOCriteria::bind()} function allows you to make use of the data object * caching layer. * * The statement will not be prepared immediately if the cacheFlag value is * true or a positive integer, in order to allow the result to be found in * the cache before being queried from an actual database connection. * * @param xPDO &$xpdo An xPDO instance that will control this criteria. * @param string $sql The SQL statement. * @param array $bindings Bindings to bind to the criteria. * @param boolean|integer $cacheFlag Indicates if the result set from the * criteria is to be cached (true|false) or optionally a TTL in seconds. * @return xPDOCriteria */ public function __construct(& $xpdo, $sql= '', $bindings= array (), $cacheFlag= false) { $this->xpdo= & $xpdo; $this->cacheFlag= $cacheFlag; if (is_string($sql) && !empty ($sql)) { $this->sql= $sql; if ($cacheFlag === false || $cacheFlag < 0) { $this->stmt= $xpdo->prepare($sql); } if (!empty ($bindings)) { $this->bind($bindings, true, $cacheFlag); } } } /** * Binds an array of key/value pairs to the xPDOCriteria prepared statement. * * Use this method to bind parameters in a way that makes it possible to * cache results of previous executions of the criteria or compare the * criteria to other individual or collections of criteria. * * @param array $bindings Bindings to merge with any existing bindings * defined for this xPDOCriteria instance. Bindings can be simple * associative array of key-value pairs or the value for each key can * contain elements titled value, type, and length corresponding to the * appropriate parameters in the PDOStatement::bindValue() and * PDOStatement::bindParam() functions. * @param boolean $byValue Determines if the $bindings are to be bound as * parameters (by variable reference, the default behavior) or by direct * value (if true). * @param boolean|integer $cacheFlag The cacheFlag indicates the cache state * of the xPDOCriteria object and can be absolutely off (false), absolutely * on (true), or an integer indicating the number of seconds the result will * live in the cache. */ public function bind($bindings= array (), $byValue= true, $cacheFlag= false) { if (!empty ($bindings)) { $this->bindings= array_merge($this->bindings, $bindings); } if (is_object($this->stmt) && $this->stmt && !empty ($this->bindings)) { reset($this->bindings); while (list ($key, $val)= each($this->bindings)) { if (is_array($val)) { $type= isset ($val['type']) ? $val['type'] : PDO::PARAM_STR; $length= isset ($val['length']) ? $val['length'] : 0; $value= & $val['value']; } else { $value= & $val; $type= PDO::PARAM_STR; $length= 0; } if (is_int($key)) $key= $key + 1; if ($byValue) { $this->stmt->bindValue($key, $value, $type); } else { $this->stmt->bindParam($key, $value, $type, $length); } } } $this->cacheFlag= $cacheFlag === null ? $this->cacheFlag : $cacheFlag; } /** * Compares to see if two xPDOCriteria instances are the same. * * @param object $obj A xPDOCriteria object to compare to this one. * @return boolean true if they are both equal is SQL and bindings, otherwise * false. */ public function equals($obj) { return (is_object($obj) && $obj instanceof xPDOCriteria && $this->sql === $obj->sql && !array_diff_assoc($this->bindings, $obj->bindings)); } /** * Prepares the sql and bindings of this instance into a PDOStatement. * * The {@link xPDOCriteria::$sql} attribute must be set in order to prepare * the statement. You can also pass bindings directly to this function and * they will be run through {@link xPDOCriteria::bind()} if the statement * is successfully prepared. * * If the {@link xPDOCriteria::$stmt} already exists, it is simply returned. * * @param array $bindings Bindings to merge with any existing bindings * defined for this xPDOCriteria instance. Bindings can be simple * associative array of key-value pairs or the value for each key can * contain elements titled value, type, and length corresponding to the * appropriate parameters in the PDOStatement::bindValue() and * PDOStatement::bindParam() functions. * @param boolean $byValue Determines if the $bindings are to be bound as * parameters (by variable reference, the default behavior) or by direct * value (if true). * @param boolean|integer $cacheFlag The cacheFlag indicates the cache state * of the xPDOCriteria object and can be absolutely off (false), absolutely * on (true), or an integer indicating the number of seconds the result will * live in the cache. * @return PDOStatement The prepared statement, ready to execute. */ public function prepare($bindings= array (), $byValue= true, $cacheFlag= null) { if ($this->stmt === null || !is_object($this->stmt)) { if (!empty ($this->sql) && $stmt= $this->xpdo->prepare($this->sql)) { $this->stmt= & $stmt; $this->bind($bindings, $byValue, $cacheFlag); } } return $this->stmt; } /** * Converts the current xPDOQuery to parsed SQL. * * @param bool $parseBindings If true, bindings are parsed locally; otherwise * they are left in place. * @return string The parsed SQL query. */ public function toSQL($parseBindings = true) { $sql = $this->sql; if ($parseBindings && !empty($this->bindings)) { $sql = $this->xpdo->parseBindings($sql, $this->bindings); } return $sql; } } /** * An iteratable representation of an xPDOObject result set. * * Use an xPDOIterator to loop over large result sets and work with one instance * at a time. This greatly reduces memory usage over loading the entire collection * of objects into memory at one time. It is also slightly faster. * * @package xpdo */ class xPDOIterator implements Iterator { private $xpdo = null; private $index = 0; private $current = null; /** @var null|PDOStatement */ private $stmt = null; private $class = null; private $alias = null; /** @var null|int|str|array|xPDOQuery */ private $criteria = null; private $criteriaType = 'xPDOQuery'; private $cacheFlag = false; /** * Construct a new xPDOIterator instance (do not call directly). * * @see xPDO::getIterator() * @param xPDO &$xpdo A reference to a valid xPDO instance. * @param array $options An array of options for the iterator. * @return xPDOIterator An xPDOIterator instance. */ function __construct(& $xpdo, array $options= array()) { $this->xpdo =& $xpdo; if (isset($options['class'])) { $this->class = $this->xpdo->loadClass($options['class']); } if (isset($options['alias'])) { $this->alias = $options['alias']; } else { $this->alias = $this->class; } if (isset($options['cacheFlag'])) { $this->cacheFlag = $options['cacheFlag']; } if (array_key_exists('criteria', $options) && is_object($options['criteria'])) { $this->criteria = $options['criteria']; } elseif (!empty($this->class)) { $criteria = array_key_exists('criteria', $options) ? $options['criteria'] : null; $this->criteria = $this->xpdo->getCriteria($this->class, $criteria, $this->cacheFlag); } if (!empty($this->criteria)) { $this->criteriaType = $this->xpdo->getCriteriaType($this->criteria); if ($this->criteriaType === 'xPDOQuery') { $this->class = $this->criteria->getClass(); $this->alias = $this->criteria->getAlias(); } } } public function rewind() { $this->index = 0; if (!empty($this->stmt)) { $this->stmt->closeCursor(); } $this->stmt = $this->criteria->prepare(); $tstart = microtime(true); if ($this->stmt && $this->stmt->execute()) { $this->xpdo->queryTime += microtime(true) - $tstart; $this->xpdo->executedQueries++; $this->fetch(); } elseif ($this->stmt) { $this->xpdo->queryTime += microtime(true) - $tstart; $this->xpdo->executedQueries++; } } public function current() { return $this->current; } public function key() { return $this->index; } public function next() { $this->fetch(); if (!$this->valid()) { $this->index = null; } else { $this->index++; } return $this->current(); } public function valid() { return ($this->current !== null); } /** * Fetch the next row from the result set and set it as current. * * Calls the _loadInstance() method for the specified class, so it properly * inherits behavior from xPDOObject derivatives. */ protected function fetch() { $row = $this->stmt->fetch(PDO::FETCH_ASSOC); if (is_array($row) && !empty($row)) { $this->current = $this->xpdo->call($this->class, '_loadInstance', array(& $this->xpdo, $this->class, $this->alias, $row)); } else { $this->current = null; } } } /** * Represents a unique PDO connection managed by xPDO. * * @package xpdo */ class xPDOConnection { /** * @var xPDO A reference to a valid xPDO instance. */ public $xpdo = null; /** * @var array An array of configuration options for this connection. */ public $config = array(); /** * @var PDO The PDO object represented by the xPDOConnection instance. */ public $pdo = null; /** * @var boolean Indicates if this connection can be written to. */ private $_mutable = true; /** * Construct a new xPDOConnection instance. * * @param xPDO $xpdo A reference to a valid xPDO instance to attach to. * @param string $dsn A string representing the DSN connection string. * @param string $username The database username credentials. * @param string $password The database password credentials. * @param array $options An array of xPDO options for the connection. * @param array $driverOptions An array of PDO driver options for the connection. */ public function __construct(xPDO &$xpdo, $dsn, $username= '', $password= '', $options= array(), $driverOptions= array()) { $this->xpdo =& $xpdo; if (is_array($this->xpdo->config)) $options= array_merge($this->xpdo->config, $options); if (!isset($options[xPDO::OPT_TABLE_PREFIX])) $options[xPDO::OPT_TABLE_PREFIX]= ''; $this->config= array_merge($options, xPDO::parseDSN($dsn)); $this->config['dsn']= $dsn; $this->config['username']= $username; $this->config['password']= $password; $driverOptions = is_array($driverOptions) ? $driverOptions : array(); if (array_key_exists('driverOptions', $this->config) && is_array($this->config['driverOptions'])) { $driverOptions = array_merge($this->config['driverOptions'], $driverOptions); } $this->config['driverOptions']= $driverOptions; if (array_key_exists(xPDO::OPT_CONN_MUTABLE, $this->config)) { $this->_mutable= (boolean) $this->config[xPDO::OPT_CONN_MUTABLE]; } } /** * Indicates if the connection can be written to, e.g. INSERT/UPDATE/DELETE. * * @return bool True if the connection can be written to. */ public function isMutable() { return $this->_mutable; } /** * Actually make a connection for this instance via PDO. * * @param array $driverOptions An array of PDO driver options for the connection. * @return bool True if a successful connection is made. */ public function connect($driverOptions = array()) { if ($this->pdo === null) { if (is_array($driverOptions) && !empty($driverOptions)) { $this->config['driverOptions']= array_merge($this->config['driverOptions'], $driverOptions); } try { $this->pdo= new PDO($this->config['dsn'], $this->config['username'], $this->config['password'], $this->config['driverOptions']); } catch (PDOException $xe) { $this->xpdo->log(xPDO::LOG_LEVEL_ERROR, $xe->getMessage(), '', __METHOD__, __FILE__, __LINE__); return false; } catch (Exception $e) { $this->xpdo->log(xPDO::LOG_LEVEL_ERROR, $e->getMessage(), '', __METHOD__, __FILE__, __LINE__); return false; } $connected= (is_object($this->pdo)); if ($connected) { $connectFile = XPDO_CORE_PATH . 'om/' . $this->config['dbtype'] . '/connect.inc.php'; if (!empty($this->config['connect_file']) && file_exists($this->config['connect_file'])) { $connectFile = $this->config['connect_file']; } if (file_exists($connectFile)) include ($connectFile); } if (!$connected) { $this->pdo= null; } } $connected= is_object($this->pdo); return $connected; } /** * Get an option set for this xPDOConnection instance. * * @param string $key The option key to get a value for. * @param array|null $options An optional array of options to consider. * @param mixed $default A default value to use if the option is not found. * @return mixed The option value. */ public function getOption($key, $options = null, $default = null) { if (is_array($options)) { $options = array_merge($this->config, $options); } else { $options = $this->config; } return $this->xpdo->getOption($key, $options, $default); } } /** * A basic class for xPDO Exceptions. */ class xPDOException extends Exception {}