628 lines
20 KiB
PHP
628 lines
20 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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/**
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* Doctrine_Connection
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*
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* @package Doctrine ORM
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* @url www.phpdoctrine.com
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* @license LGPL
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*/
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abstract class Doctrine_Connection extends Doctrine_Configurable implements Countable, IteratorAggregate {
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/**
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* @var $dbh the database handler
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*/
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private $dbh;
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/**
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* @var Doctrine_Transaction $transaction the transaction object
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*/
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private $transaction;
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/**
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* @var Doctrine_UnitOfWork $unitOfWork the unit of work object
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*/
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private $unitOfWork;
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/**
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* @var array $tables an array containing all the initialized Doctrine_Table objects
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* keys representing Doctrine_Table component names and values as Doctrine_Table objects
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*/
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protected $tables = array();
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/**
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* @var Doctrine_DataDict $dataDict
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*/
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private $dataDict;
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/**
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* the constructor
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*
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* @param Doctrine_Manager $manager the manager object
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* @param PDO $pdo the database handler
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*/
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public function __construct(Doctrine_Manager $manager,PDO $pdo) {
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$this->dbh = $pdo;
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$this->transaction = new Doctrine_Connection_Transaction($this);
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$this->unitOfWork = new Doctrine_Connection_UnitOfWork($this);
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$this->setParent($manager);
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$this->dbh->setAttribute(PDO::ATTR_CASE, PDO::CASE_NATURAL);
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$this->dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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$this->getAttribute(Doctrine::ATTR_LISTENER)->onOpen($this);
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}
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/**
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* getUnitOfWork
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*
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* returns the unit of work object
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*
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* @return Doctrine_UnitOfWork
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*/
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public function getUnitOfWork() {
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return $this->unitOfWork;
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}
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/**
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* getTransaction
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*
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* returns the current transaction object
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*
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* @return Doctrine_Transaction
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*/
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public function getTransaction() {
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return $this->transaction;
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}
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/**
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* returns the manager that created this connection
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*
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* @return Doctrine_Manager
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*/
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public function getManager() {
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return $this->getParent();
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}
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/**
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* returns the database handler of which this connection uses
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*
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* @return PDO the database handler
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*/
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public function getDBH() {
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return $this->dbh;
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}
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/**
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* returns a datadict object
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*
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* @return Doctrine_DataDict
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*/
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public function getDataDict() {
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if(isset($this->dataDict))
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return $this->dataDict;
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$driver = $this->dbh->getAttribute(PDO::ATTR_DRIVER_NAME);
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switch($driver) {
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case "mysql":
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$this->dataDict = new Doctrine_DataDict_Mysql($this);
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break;
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case "sqlite":
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case "sqlite2":
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$this->dataDict = new Doctrine_DataDict_Sqlite($this);
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break;
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case "pgsql":
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$this->dataDict = new Doctrine_DataDict_Pgsql($this);
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break;
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case "oci":
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case "oci8":
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$this->dataDict = new Doctrine_DataDict_Oracle($this);
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break;
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case "mssql":
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$this->dataDict = new Doctrine_DataDict_Mssql($this);
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break;
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default:
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throw new Doctrine_Connection_Exception("No datadict driver availible for ".$driver);
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}
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return $this->dataDict;
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}
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/**
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* Set the transacton isolation level.
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* (implemented by the connection drivers)
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*
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* @param string standard isolation level
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* READ UNCOMMITTED (allows dirty reads)
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* READ COMMITTED (prevents dirty reads)
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* REPEATABLE READ (prevents nonrepeatable reads)
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* SERIALIZABLE (prevents phantom reads)
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* @throws Doctrine_Connection_Mysql_Exception if using unknown isolation level
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* @throws PDOException if something fails at the PDO level
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* @return void
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*/
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public function setTransactionIsolation($isolation) {
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throw new Doctrine_Connection_Exception('Transaction isolation levels not supported by this database driver.');
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}
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/**
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* getRegexpOperator
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* returns the regular expression operator
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* (implemented by the connection drivers)
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*
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* @return string
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*/
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public function getRegexpOperator() {
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throw new Doctrine_Connection_Exception('Regular expression operator is not supported by this database driver.');
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}
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/**
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* query
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* queries the database with Doctrine Query Language
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*
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* @param string $query DQL query
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* @param array $params query parameters
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*/
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final public function query($query,array $params = array()) {
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$parser = new Doctrine_Query($this);
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return $parser->query($query, $params);
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}
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/**
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* queries the database with limit and offset
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* added to the query and returns a PDOStatement object
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*
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* @param string $query
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* @param integer $limit
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* @param integer $offset
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* @return PDOStatement
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*/
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public function select($query,$limit = 0,$offset = 0) {
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if($limit > 0 || $offset > 0)
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$query = $this->modifyLimitQuery($query,$limit,$offset);
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return $this->dbh->query($query);
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}
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/**
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* @param string $query sql query
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* @param array $params query parameters
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*
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* @return PDOStatement
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*/
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public function execute($query, array $params = array()) {
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if( ! empty($params)) {
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$stmt = $this->dbh->prepare($query);
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$stmt->execute($params);
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return $stmt;
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} else {
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return $this->dbh->query($query);
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}
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}
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/**
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* whether or not this connection has table $name initialized
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*
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* @param $mixed $name
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* @return boolean
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*/
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public function hasTable($name) {
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return isset($this->tables[$name]);
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}
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/**
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* returns a table object for given component name
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*
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* @param string $name component name
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* @return object Doctrine_Table
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*/
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public function getTable($name) {
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if(isset($this->tables[$name]))
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return $this->tables[$name];
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$class = $name."Table";
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if(class_exists($class) && in_array("Doctrine_Table", class_parents($class))) {
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return new $class($name, $this);
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} else {
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return new Doctrine_Table($name, $this);
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}
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}
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/**
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* returns an array of all initialized tables
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*
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* @return array
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*/
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public function getTables() {
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return $this->tables;
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}
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/**
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* returns an iterator that iterators through all
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* initialized table objects
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*
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* @return ArrayIterator
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*/
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public function getIterator() {
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return new ArrayIterator($this->tables);
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}
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/**
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* returns the count of initialized table objects
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*
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* @return integer
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*/
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public function count() {
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return count($this->tables);
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}
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/**
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* addTable
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* adds a Doctrine_Table object into connection registry
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*
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* @param $objTable a Doctrine_Table object to be added into registry
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* @return boolean
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*/
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public function addTable(Doctrine_Table $objTable) {
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$name = $objTable->getComponentName();
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if(isset($this->tables[$name]))
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return false;
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$this->tables[$name] = $objTable;
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return true;
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}
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/**
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* create
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* creates a record
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*
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* create creates a record
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* @param string $name component name
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* @return Doctrine_Record Doctrine_Record object
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*/
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public function create($name) {
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return $this->getTable($name)->create();
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}
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/**
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* flush
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* saves all the records from all tables
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* this operation is isolated using a transaction
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*
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* @return void
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*/
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public function flush() {
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$this->beginTransaction();
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$this->saveAll();
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$this->commit();
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}
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/**
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* saveAll
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* persists all the records from all tables
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*
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* @return void
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*/
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private function saveAll() {
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$tree = $this->unitOfWork->buildFlushTree($this->tables);
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foreach($tree as $name) {
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$table = $this->tables[$name];
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foreach($table->getRepository() as $record) {
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$this->save($record);
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}
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}
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foreach($tree as $name) {
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$table = $this->tables[$name];
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foreach($table->getRepository() as $record) {
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$record->saveAssociations();
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}
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}
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}
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/**
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* clear
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* clears all repositories
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*
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* @return void
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*/
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public function clear() {
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foreach($this->tables as $k => $table) {
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$table->getRepository()->evictAll();
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$table->clear();
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}
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}
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/**
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* evictTables
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* evicts all tables
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*
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* @return void
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*/
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public function evictTables() {
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$this->tables = array();
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}
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/**
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* close
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* closes the connection
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*
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* @return void
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*/
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public function close() {
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$this->getAttribute(Doctrine::ATTR_LISTENER)->onPreClose($this);
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$this->clear();
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$this->state = Doctrine_Connection::STATE_CLOSED;
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$this->getAttribute(Doctrine::ATTR_LISTENER)->onClose($this);
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}
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/**
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* get the current transaction nesting level
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*
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* @return integer
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*/
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public function getTransactionLevel() {
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return $this->transaction->getTransactionLevel();
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}
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/**
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* beginTransaction
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* starts a new transaction
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* @return void
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*/
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public function beginTransaction() {
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$this->transaction->beginTransaction();
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}
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/**
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* commits the current transaction
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* if lockmode is optimistic this method starts a transaction
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* and commits it instantly
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*
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* @return void
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*/
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public function commit() {
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$this->transaction->commit();
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}
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/**
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* rollback
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* rolls back all transactions
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*
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* this method also listens to onPreTransactionRollback and onTransactionRollback
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* eventlisteners
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*
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* @return void
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*/
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public function rollback() {
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$this->transaction->rollback();
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}
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/**
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* returns maximum identifier values
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*
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* @param array $names an array of component names
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* @return array
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*/
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public function getMaximumValues(array $names) {
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$values = array();
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foreach($names as $name) {
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$table = $this->tables[$name];
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$keys = $table->getPrimaryKeys();
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$tablename = $table->getTableName();
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if(count($keys) == 1 && $keys[0] == $table->getIdentifier()) {
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// record uses auto_increment column
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$sql = "SELECT MAX(".$table->getIdentifier().") FROM ".$tablename;
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$stmt = $this->dbh->query($sql);
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$data = $stmt->fetch(PDO::FETCH_NUM);
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$values[$tablename] = $data[0];
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$stmt->closeCursor();
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}
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}
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return $values;
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}
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/**
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* saves a collection
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*
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* @param Doctrine_Collection $coll
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* @return void
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*/
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public function saveCollection(Doctrine_Collection $coll) {
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$this->beginTransaction();
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foreach($coll as $key=>$record):
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$record->save();
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endforeach;
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$this->commit();
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}
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/**
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* deletes all records from collection
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*
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* @param Doctrine_Collection $coll
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* @return void
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*/
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public function deleteCollection(Doctrine_Collection $coll) {
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$this->beginTransaction();
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foreach($coll as $k=>$record) {
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$record->delete();
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}
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$this->commit();
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}
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/**
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* saves the given record
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*
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* @param Doctrine_Record $record
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* @return void
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*/
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public function save(Doctrine_Record $record) {
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$record->getTable()->getAttribute(Doctrine::ATTR_LISTENER)->onPreSave($record);
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switch($record->getState()):
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case Doctrine_Record::STATE_TDIRTY:
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$this->transaction->insert($record);
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break;
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case Doctrine_Record::STATE_DIRTY:
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case Doctrine_Record::STATE_PROXY:
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$this->transaction->update($record);
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break;
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case Doctrine_Record::STATE_CLEAN:
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case Doctrine_Record::STATE_TCLEAN:
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// do nothing
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break;
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endswitch;
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$record->getTable()->getAttribute(Doctrine::ATTR_LISTENER)->onSave($record);
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}
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/**
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* saves all related records to $record
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*
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* @param Doctrine_Record $record
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*/
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public function saveRelated(Doctrine_Record $record) {
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$saveLater = array();
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foreach($record->getReferences() as $k=>$v) {
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$fk = $record->getTable()->getRelation($k);
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if($fk instanceof Doctrine_Relation_ForeignKey ||
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$fk instanceof Doctrine_Relation_LocalKey) {
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if($fk->isComposite()) {
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$local = $fk->getLocal();
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$foreign = $fk->getForeign();
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if($record->getTable()->hasPrimaryKey($fk->getLocal())) {
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if( ! $record->exists())
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$saveLater[$k] = $fk;
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else
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$v->save();
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} else {
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// ONE-TO-ONE relationship
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$obj = $record->get($fk->getTable()->getComponentName());
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if($obj->getState() != Doctrine_Record::STATE_TCLEAN)
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$obj->save();
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}
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}
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} elseif($fk instanceof Doctrine_Relation_Association) {
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$v->save();
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}
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}
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return $saveLater;
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}
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/**
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* deletes all related composites
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* this method is always called internally when a record is deleted
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*
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* @return void
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*/
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final public function deleteComposites(Doctrine_Record $record) {
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foreach($record->getTable()->getRelations() as $fk) {
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switch($fk->getType()):
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case Doctrine_Relation::ONE_COMPOSITE:
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case Doctrine_Relation::MANY_COMPOSITE:
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$obj = $record->get($fk->getAlias());
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$obj->delete();
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break;
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endswitch;
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}
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}
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/**
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* saveAssociations
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* save the associations of many-to-many relations
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* this method also deletes associations that do not exist anymore
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* @return void
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*/
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final public function saveAssociations(Doctrine_Record $record) {
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foreach($record->getTable()->table->getRelations() as $rel):
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$table = $rel->getTable();
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$name = $table->getComponentName();
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$alias = $this->table->getAlias($name);
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if($rel instanceof Doctrine_Relation_Association) {
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$asf = $rel->getAssociationFactory();
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if($record->hasReference($alias)) {
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$new = $record->getReference($alias);
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if( ! $this->hasOriginalsFor($alias))
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$record->loadReference($alias);
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$operations = Doctrine_Relation::getDeleteOperations($this->originals[$alias],$new);
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foreach($operations as $r) {
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$query = "DELETE FROM ".$asf->getTableName()." WHERE ".$fk->getForeign()." = ?"
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." AND ".$fk->getLocal()." = ?";
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$this->table->getConnection()->execute($query, array($r->getIncremented(),$record->getIncremented()));
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}
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$operations = Doctrine_Relation::getInsertOperations($record->obtainOriginals($alias),$new);
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foreach($operations as $r) {
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$reldao = $asf->create();
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$reldao->set($fk->getForeign(),$r);
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$reldao->set($fk->getLocal(),$this);
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$reldao->save();
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}
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$record->assignOriginals($alias, clone $this->references[$alias]);
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}
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} elseif($fk instanceof Doctrine_Relation_ForeignKey ||
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$fk instanceof Doctrine_Relation_LocalKey) {
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if($fk->isOneToOne()) {
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if($record->obtainOriginals($alias) && $record->obtainOriginals($alias)->obtainIdentifier() != $this->references[$alias]->obtainIdentifier())
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$record->obtainOriginals($alias)->delete();
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} else {
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if(isset($this->references[$alias])) {
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$new = $this->references[$alias];
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|
|
|
if( ! isset($this->originals[$alias]))
|
|
$record->loadReference($alias);
|
|
|
|
$operations = Doctrine_Relation::getDeleteOperations($this->originals[$alias], $new);
|
|
|
|
foreach($operations as $r) {
|
|
$r->delete();
|
|
}
|
|
|
|
$record->assignOriginals($alias, clone $this->references[$alias]);
|
|
}
|
|
}
|
|
}
|
|
endforeach;
|
|
}
|
|
/**
|
|
* deletes this data access object and all the related composites
|
|
* this operation is isolated by a transaction
|
|
*
|
|
* this event can be listened by the onPreDelete and onDelete listeners
|
|
*
|
|
* @return boolean true on success, false on failure
|
|
*/
|
|
final public function delete(Doctrine_Record $record) {
|
|
if( ! $record->exists())
|
|
return false;
|
|
|
|
$this->beginTransaction();
|
|
|
|
$record->getTable()->getListener()->onPreDelete($record);
|
|
|
|
$this->deleteComposites($record);
|
|
|
|
$this->transaction->addDelete($record);
|
|
|
|
$record->getTable()->getListener()->onDelete($record);
|
|
|
|
$this->commit();
|
|
return true;
|
|
}
|
|
/**
|
|
* returns a string representation of this object
|
|
* @return string
|
|
*/
|
|
public function __toString() {
|
|
return Doctrine_Lib::getConnectionAsString($this);
|
|
}
|
|
}
|
|
|