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doctrine2/lib/Doctrine/Collection.php
2007-06-19 19:26:18 +00:00

661 lines
18 KiB
PHP

<?php
/*
* $Id$
*
* 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>.
*/
Doctrine::autoload('Doctrine_Access');
/**
* Doctrine_Collection
* Collection of Doctrine_Record objects.
*
* @package Doctrine
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @category Object Relational Mapping
* @link www.phpdoctrine.com
* @since 1.0
* @version $Revision$
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Collection extends Doctrine_Access implements Countable, IteratorAggregate, Serializable
{
/**
* @var array $data an array containing the records of this collection
*/
protected $data = array();
/**
* @var Doctrine_Table $table each collection has only records of specified table
*/
protected $_table;
/**
* @var array $_snapshot a snapshot of the fetched data
*/
protected $_snapshot = array();
/**
* @var Doctrine_Record $reference collection can belong to a record
*/
protected $reference;
/**
* @var string $referenceField the reference field of the collection
*/
protected $referenceField;
/**
* @var Doctrine_Relation the record this collection is related to, if any
*/
protected $relation;
/**
* @var string $keyColumn the name of the column that is used for collection key mapping
*/
protected $keyColumn;
/**
* @var Doctrine_Null $null used for extremely fast null value testing
*/
protected static $null;
/**
* constructor
*
* @param Doctrine_Table|string $table
*/
public function __construct($table)
{
if ( ! ($table instanceof Doctrine_Table)) {
$table = Doctrine_Manager::getInstance()
->getTable($table);
}
$this->_table = $table;
$name = $table->getAttribute(Doctrine::ATTR_COLL_KEY);
if ($name !== null) {
$this->keyColumn = $name;
}
}
/**
* initNullObject
* initializes the null object for this collection
*
* @return void
*/
public static function initNullObject(Doctrine_Null $null)
{
self::$null = $null;
}
/**
* getTable
* returns the table this collection belongs to
*
* @return Doctrine_Table
*/
public function getTable()
{
return $this->_table;
}
/**
* setData
*
* @param array $data
* @return Doctrine_Collection
*/
public function setData(array $data)
{
$this->data = $data;
}
/**
* this method is automatically called when this Doctrine_Collection is serialized
*
* @return array
*/
public function serialize()
{
$vars = get_object_vars($this);
unset($vars['reference']);
unset($vars['reference_field']);
unset($vars['relation']);
unset($vars['expandable']);
unset($vars['expanded']);
unset($vars['generator']);
$vars['_table'] = $vars['_table']->getComponentName();
return serialize($vars);
}
/**
* unseralize
* this method is automatically called everytime a Doctrine_Collection object is unserialized
*
* @return void
*/
public function unserialize($serialized)
{
$manager = Doctrine_Manager::getInstance();
$connection = $manager->getCurrentConnection();
$array = unserialize($serialized);
foreach ($array as $name => $values) {
$this->$name = $values;
}
$this->_table = $connection->getTable($this->_table);
$name = $this->_table->getAttribute(Doctrine::ATTR_COLL_KEY);
if ($name !== null) {
$this->keyColumn = $name;
}
}
/**
* setKeyColumn
* sets the key column for this collection
*
* @param string $column
* @return Doctrine_Collection
*/
public function setKeyColumn($column)
{
$this->keyColumn = $column;
return $this;
}
/**
* getKeyColumn
* returns the name of the key column
*
* @return string
*/
public function getKeyColumn()
{
return $this->column;
}
/**
* getData
* returns all the records as an array
*
* @return array
*/
public function getData()
{
return $this->data;
}
/**
* getFirst
* returns the first record in the collection
*
* @return mixed
*/
public function getFirst()
{
return reset($this->data);
}
/**
* getLast
* returns the last record in the collection
*
* @return mixed
*/
public function getLast()
{
return end($this->data);
}
/**
* setReference
* sets a reference pointer
*
* @return void
*/
public function setReference(Doctrine_Record $record, Doctrine_Relation $relation)
{
$this->reference = $record;
$this->relation = $relation;
if ($relation instanceof Doctrine_Relation_ForeignKey
|| $relation instanceof Doctrine_Relation_LocalKey
) {
$this->referenceField = $relation->getForeign();
$value = $record->get($relation->getLocal());
foreach ($this->data as $record) {
if ($value !== null) {
$record->set($this->referenceField, $value, false);
} else {
$record->set($this->referenceField, $this->reference, false);
}
}
} elseif ($relation instanceof Doctrine_Relation_Association) {
}
}
/**
* getReference
*
* @return mixed
*/
public function getReference()
{
return $this->reference;
}
/**
* remove
* removes a specified collection element
*
* @param mixed $key
* @return boolean
*/
public function remove($key)
{
$removed = $this->data[$key];
unset($this->data[$key]);
return $removed;
}
/**
* contains
* whether or not this collection contains a specified element
*
* @param mixed $key the key of the element
* @return boolean
*/
public function contains($key)
{
return isset($this->data[$key]);
}
public function search(Doctrine_Record $record)
{
return array_search($record, $this->data, true);
}
/**
* get
* returns a record for given key
*
* There are two special cases:
*
* 1. if null is given as a key a new record is created and attached
* at the end of the collection
*
* 2. if given key does not exist, then a new record is create and attached
* to the given key
*
* Collection also maps referential information to newly created records
*
* @param mixed $key the key of the element
* @return Doctrine_Record return a specified record
*/
public function get($key)
{
if ($key === null || ! isset($this->data[$key])) {
$record = $this->_table->create();
if (isset($this->referenceField)) {
$value = $this->reference->get($this->relation->getLocal());
if ($value !== null) {
$record->set($this->referenceField, $value, false);
} else {
$record->set($this->referenceField, $this->reference, false);
}
}
$this->data[] = $record;
return $record;
}
return $this->data[$key];
}
/**
* @return array an array containing all primary keys
*/
public function getPrimaryKeys()
{
$list = array();
$name = $this->_table->getIdentifier();
foreach ($this->data as $record) {
if (is_array($record) && isset($record[$name])) {
$list[] = $record[$name];
} else {
$list[] = $record->getIncremented();
}
}
return $list;
}
/**
* returns all keys
* @return array
*/
public function getKeys()
{
return array_keys($this->data);
}
/**
* count
* this class implements interface countable
* returns the number of records in this collection
*
* @return integer
*/
public function count()
{
return count($this->data);
}
/**
* set
* @param integer $key
* @param Doctrine_Record $record
* @return void
*/
public function set($key, Doctrine_Record $record)
{
if (isset($this->referenceField)) {
$record->set($this->referenceField, $this->reference, false);
}
$this->data[$key] = $record;
}
/**
* adds a record to collection
* @param Doctrine_Record $record record to be added
* @param string $key optional key for the record
* @return boolean
*/
public function add(Doctrine_Record $record, $key = null)
{
if (isset($this->referenceField)) {
$value = $this->reference->get($this->relation->getLocal());
if ($value !== null) {
$record->set($this->referenceField, $value, false);
} else {
$record->set($this->referenceField, $this->reference, false);
}
}
/**
* for some weird reason in_array cannot be used here (php bug ?)
*
* if used it results in fatal error : [ nesting level too deep ]
*/
foreach ($this->data as $val) {
if ($val === $record) {
return false;
}
}
if (isset($key)) {
if (isset($this->data[$key])) {
return false;
}
$this->data[$key] = $record;
return true;
}
if (isset($this->keyColumn)) {
$value = $record->get($this->keyColumn);
if ($value === null) {
throw new Doctrine_Collection_Exception("Couldn't create collection index. Record field '".$this->keyColumn."' was null.");
}
$this->data[$value] = $record;
} else {
$this->data[] = $record;
}
return true;
}
/**
* loadRelated
*
* @param mixed $name
* @return boolean
*/
public function loadRelated($name = null)
{
$list = array();
$query = new Doctrine_Query($this->_table->getConnection());
if ( ! isset($name)) {
foreach ($this->data as $record) {
$value = $record->getIncremented();
if ($value !== null) {
$list[] = $value;
}
}
$query->from($this->_table->getComponentName() . '(' . implode(", ",$this->_table->getPrimaryKeys()) . ')');
$query->where($this->_table->getComponentName() . '.id IN (' . substr(str_repeat("?, ", count($list)),0,-2) . ')');
return $query;
}
$rel = $this->_table->getRelation($name);
if ($rel instanceof Doctrine_Relation_LocalKey || $rel instanceof Doctrine_Relation_ForeignKey) {
foreach ($this->data as $record) {
$list[] = $record[$rel->getLocal()];
}
} else {
foreach ($this->data as $record) {
$value = $record->getIncremented();
if ($value !== null) {
$list[] = $value;
}
}
}
$dql = $rel->getRelationDql(count($list), 'collection');
$coll = $query->query($dql, $list);
$this->populateRelated($name, $coll);
}
/**
* populateRelated
*
* @param string $name
* @param Doctrine_Collection $coll
* @return void
*/
public function populateRelated($name, Doctrine_Collection $coll)
{
$rel = $this->_table->getRelation($name);
$table = $rel->getTable();
$foreign = $rel->getForeign();
$local = $rel->getLocal();
if ($rel instanceof Doctrine_Relation_LocalKey) {
foreach ($this->data as $key => $record) {
foreach ($coll as $k => $related) {
if ($related[$foreign] == $record[$local]) {
$this->data[$key]->setRelated($name, $related);
}
}
}
} elseif ($rel instanceof Doctrine_Relation_ForeignKey) {
foreach ($this->data as $key => $record) {
if ( ! $record->exists()) {
continue;
}
$sub = new Doctrine_Collection($table);
foreach ($coll as $k => $related) {
if ($related[$foreign] == $record[$local]) {
$sub->add($related);
$coll->remove($k);
}
}
$this->data[$key]->setRelated($name, $sub);
}
} elseif ($rel instanceof Doctrine_Relation_Association) {
$identifier = $this->_table->getIdentifier();
$asf = $rel->getAssociationFactory();
$name = $table->getComponentName();
foreach ($this->data as $key => $record) {
if ( ! $record->exists()) {
continue;
}
$sub = new Doctrine_Collection($table);
foreach ($coll as $k => $related) {
if ($related->get($local) == $record[$identifier]) {
$sub->add($related->get($name));
}
}
$this->data[$key]->setRelated($name, $sub);
}
}
}
/**
* getNormalIterator
* returns normal iterator - an iterator that will not expand this collection
*
* @return Doctrine_Iterator_Normal
*/
public function getNormalIterator()
{
return new Doctrine_Collection_Iterator_Normal($this);
}
/**
* takeSnapshot
* takes a snapshot from this collection
*
* snapshots are used for diff processing, for example
* when a fetched collection has three elements, then two of those
* are being removed the diff would contain one element
*
* Doctrine_Collection::save() attaches the diff with the help of last
* snapshot.
*
* @return Doctrine_Collection
*/
public function takeSnapshot()
{
$this->_snapshot = $this->data;
return $this;
}
/**
* getSnapshot
* returns the data of the last snapshot
*
* @return array returns the data in last snapshot
*/
public function getSnapshot()
{
return $this->_snapshot;
}
/**
* processDiff
* processes the difference of the last snapshot and the current data
*
* an example:
* Snapshot with the objects 1, 2 and 4
* Current data with objects 2, 3 and 5
*
* The process would remove object 4
*
* @return Doctrine_Collection
*/
public function processDiff()
{
foreach (array_diff($this->_snapshot, $this->data) as $record) {
$record->delete();
}
return $this;
}
public function getDeleteDiff()
{
return array_diff($this->_snapshot, $this->data);
}
public function getInsertDiff()
{
return array_diff($this->data, $this->_snapshot);
}
/**
* save
* saves all records of this collection and processes the
* difference of the last snapshot and the current data
*
* @param Doctrine_Connection $conn optional connection parameter
* @return Doctrine_Collection
*/
public function save(Doctrine_Connection $conn = null)
{
if ($conn == null) {
$conn = $this->_table->getConnection();
}
$conn->beginTransaction();
$conn->transaction->addCollection($this);
$this->processDiff();
foreach ($this->getData() as $key => $record) {
$record->save($conn);
}
$conn->commit();
return $this;
}
/**
* delete
* single shot delete
* deletes all records from this collection
* and uses only one database query to perform this operation
*
* @return Doctrine_Collection
*/
public function delete(Doctrine_Connection $conn = null)
{
if ($conn == null) {
$conn = $this->_table->getConnection();
}
$conn->beginTransaction();
$conn->transaction->addCollection($this);
foreach ($this as $key => $record) {
$record->delete($conn);
}
$conn->commit();
$this->data = array();
return $this;
}
/**
* getIterator
* @return object ArrayIterator
*/
public function getIterator()
{
$data = $this->data;
return new ArrayIterator($data);
}
/**
* returns a string representation of this object
*/
public function __toString()
{
return Doctrine_Lib::getCollectionAsString($this);
}
}