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doctrine2/lib/Doctrine/Collection/Batch.php

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<?php
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/*
* $Id$
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.com>.
*/
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Doctrine::autoload('Doctrine_Collection');
/**
* Doctrine_Collection_Batch a collection of records,
* with batch load strategy
*
*
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
* @package Doctrine
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @version $Revision$
* @category Object Relational Mapping
* @link www.phpdoctrine.com
* @since 1.0
*/
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class Doctrine_Collection_Batch extends Doctrine_Collection {
/**
* @var integer $batchSize batch size
*/
private $batchSize;
/**
* @var array $loaded an array containing the loaded batches, keys representing the batch indexes
*/
private $loaded = array();
public function __construct(Doctrine_Table $table) {
parent::__construct($table);
$this->batchSize = $this->getTable()->getAttribute(Doctrine::ATTR_BATCH_SIZE);
}
/**
* @param integer $batchSize batch size
* @return boolean
*/
public function setBatchSize($batchSize) {
$batchSize = (int) $batchSize;
if($batchSize <= 0)
return false;
$this->batchSize = $batchSize;
return true;
}
/**
* returns the batch size of this collection
*
* @return integer
*/
public function getBatchSize() {
return $this->batchSize;
}
/**
* load
* loads a specified element, by loading the batch the element is part of
*
* @param Doctrine_Record $record record to be loaded
* @return boolean whether or not the load operation was successful
*/
public function load(Doctrine_Record $record) {
if(empty($this->data))
return false;
$id = $record->obtainIdentifier();
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$identifier = $this->table->getIdentifier();
foreach($this->data as $key => $v) {
if(is_object($v)) {
if($v->obtainIdentifier() == $id)
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break;
} elseif(is_array($v[$identifier])) {
if($v[$identifier] == $id)
break;
}
}
$x = floor($key / $this->batchSize);
if( ! isset($this->loaded[$x])) {
$e = $x * $this->batchSize;
$e2 = ($x + 1)* $this->batchSize;
$a = array();
$proxies = array();
for($i = $e; $i < $e2 && $i < $this->count(); $i++):
if($this->data[$i] instanceof Doctrine_Record)
$id = $this->data[$i]->getIncremented();
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elseif(is_array($this->data[$i]))
$id = $this->data[$i][$identifier];
$a[$i] = $id;
endfor;
$c = count($a);
$pk = $this->table->getPrimaryKeys();
$query = $this->table->getQuery()." WHERE ";
$query .= ($c > 1)?$identifier." IN (":$pk[0]." = ";
$query .= substr(str_repeat("?, ",count($a)),0,-2);
$query .= ($c > 1)?") ORDER BY ".$pk[0]." ASC":"";
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$stmt = $this->table->getConnection()->execute($query,array_values($a));
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foreach($a as $k => $id) {
$row = $stmt->fetch(PDO::FETCH_ASSOC);
if($row === false)
break;
$this->table->setData($row);
if(is_object($this->data[$k])) {
$this->data[$k]->factoryRefresh($this->table);
} else {
$this->data[$k] = $this->table->getRecord();
}
}
$this->loaded[$x] = true;
return true;
} else {
return false;
}
}
/**
* get
* @param mixed $key the key of the record
* @return object Doctrine_Record record
*/
public function get($key) {
if(isset($this->data[$key])) {
switch(gettype($this->data[$key])):
case "array":
// Doctrine_Record didn't exist in cache
$this->table->setData($this->data[$key]);
$this->data[$key] = $this->table->getProxy();
$this->data[$key]->addCollection($this);
break;
endswitch;
} else {
$this->expand($key);
if( ! isset($this->data[$key]))
$this->data[$key] = $this->table->create();
}
if(isset($this->reference_field))
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$this->data[$key]->set($this->reference_field, $this->reference, false);
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return $this->data[$key];
}
/**
* @return Doctrine_Iterator
*/
public function getIterator() {
return new Doctrine_Collection_Iterator_Expandable($this);
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}
}