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doctrine2/Doctrine/Collection.php
2006-07-21 23:22:15 +00:00

507 lines
15 KiB
PHP

<?php
require_once("Access.php");
/**
* Doctrine_Collection
* Collection of Doctrine_Record objects.
*
* @package Doctrine ORM
* @url www.phpdoctrine.com
* @license LGPL
*/
class Doctrine_Collection extends Doctrine_Access implements Countable, IteratorAggregate, Serializable {
/**
* @var array $data an array containing the data access objects of this collection
*/
protected $data = array();
/**
* @var Doctrine_Table $table each collection has only records of specified table
*/
protected $table;
/**
* @var Doctrine_Record $reference collection can belong to a record
*/
protected $reference;
/**
* @var string $reference_field the reference field of the collection
*/
protected $reference_field;
/**
* @var Doctrine_Relation the record this collection is related to, if any
*/
protected $relation;
/**
* @var boolean $expandable whether or not this collection has been expanded
*/
protected $expandable = true;
/**
* @var array $expanded
*/
protected $expanded = array();
/**
* @var mixed $generator
*/
protected $generator;
/**
* @var Doctrine_Null $null used for extremely fast SQL null value testing
*/
protected static $null;
/**
* constructor
*/
public function __construct(Doctrine_Table $table) {
$this->table = $table;
$name = $table->getAttribute(Doctrine::ATTR_COLL_KEY);
if($name !== null) {
$this->generator = new Doctrine_IndexGenerator($name);
}
}
/**
* initNullObject
*/
public static function initNullObject(Doctrine_Null $null) {
self::$null = $null;
}
/**
* @return object Doctrine_Table
*/
public function getTable() {
return $this->table;
}
/**
* 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();
$session = $manager->getCurrentSession();
$array = unserialize($serialized);
foreach($array as $name => $values) {
$this->$name = $values;
}
$this->table = $session->getTable($this->table);
$this->expanded = array();
$this->expandable = true;
$name = $this->table->getAttribute(Doctrine::ATTR_COLL_KEY);
if($name !== null) {
$this->generator = new Doctrine_IndexGenerator($name);
}
}
/**
* whether or not an offset batch has been expanded
* @return boolean
*/
public function isExpanded($offset) {
return isset($this->expanded[$offset]);
}
/**
* whether or not this collection is expandable
* @return boolean
*/
public function isExpandable() {
return $this->expandable;
}
/**
* @param Doctrine_IndexGenerator $generator
* @return void
*/
public function setGenerator($generator) {
$this->generator = $generator;
}
/**
* @return Doctrine_IndexGenerator
*/
public function getGenerator() {
return $this->generator;
}
/**
* @return array
*/
public function getData() {
return $this->data;
}
/**
* @param array $data
*/
public function addData(array $data) {
$this->data[] = $data;
}
/**
* @return mixed
*/
public function getLast() {
return end($this->data);
}
/**
* @return void
*/
public function setReference(Doctrine_Record $record,Doctrine_Relation $relation) {
$this->reference = $record;
$this->relation = $relation;
if($relation instanceof Doctrine_ForeignKey ||
$relation instanceof Doctrine_LocalKey) {
$this->reference_field = $relation->getForeign();
$value = $record->get($relation->getLocal());
foreach($this->getNormalIterator() as $record) {
if($value !== null) {
$record->rawSet($this->reference_field, $value);
} else {
$record->rawSet($this->reference_field, $this->reference);
}
}
} elseif($relation instanceof Doctrine_Association) {
}
}
/**
* @return mixed
*/
public function getReference() {
return $this->reference;
}
/**
* @return boolean
*/
public function expand($key) {
$where = array();
$params = array();
$limit = null;
$offset = null;
switch(get_class($this)):
case "Doctrine_Collection_Offset":
$limit = $this->getLimit();
$offset = (floor($key / $limit) * $limit);
if( ! $this->expandable && isset($this->expanded[$offset]))
return false;
$fields = implode(", ",$this->table->getColumnNames());
break;
default:
if( ! $this->expandable)
return false;
if( ! isset($this->reference))
return false;
$id = $this->reference->getID();
if(empty($id))
return false;
switch(get_class($this)):
case "Doctrine_Collection_Immediate":
$fields = implode(", ",$this->table->getColumnNames());
break;
default:
$fields = implode(", ",$this->table->getPrimaryKeys());
endswitch;
endswitch;
if(isset($this->relation)) {
if($this->relation instanceof Doctrine_ForeignKey) {
$params[] = $this->reference->getIncremented();
$where[] = $this->reference_field." = ?";
if( ! isset($offset)) {
$ids = $this->getPrimaryKeys();
if( ! empty($ids)) {
$where[] = $this->table->getIdentifier()." NOT IN (".substr(str_repeat("?, ",count($ids)),0,-2).")";
$params = array_merge($params,$ids);
}
$this->expandable = false;
}
} elseif($this->relation instanceof Doctrine_Association) {
$asf = $this->relation->getAssociationFactory();
$query = "SELECT ".$foreign." FROM ".$asf->getTableName()." WHERE ".$local."=".$this->getIncremented();
$table = $fk->getTable();
$graph = new Doctrine_DQL_Parser($table->getSession());
$q = "FROM ".$table->getComponentName()." WHERE ".$table->getComponentName().".".$table->getIdentifier()." IN ($query)";
}
}
$query = "SELECT ".$fields." FROM ".$this->table->getTableName();
// apply column aggregation inheritance
foreach($this->table->getInheritanceMap() as $k => $v) {
$where[] = $k." = ?";
$params[] = $v;
}
if( ! empty($where)) {
$query .= " WHERE ".implode(" AND ",$where);
}
$coll = $this->table->execute($query, $params, $limit, $offset);
if( ! isset($offset)) {
foreach($coll as $record) {
if(isset($this->reference_field))
$record->rawSet($this->reference_field,$this->reference);
$this->reference->addReference($record, $this->relation);
}
} else {
$i = $offset;
foreach($coll as $record) {
if(isset($this->reference)) {
$this->reference->addReference($record, $this->relation, $i);
} else
$this->data[$i] = $record;
$i++;
}
$this->expanded[$offset] = true;
// check if the fetched collection's record count is smaller
// than the query limit, if so this collection has been expanded to its max size
if(count($coll) < $limit) {
$this->expandable = false;
}
}
return $coll;
}
/**
* @return boolean
*/
public function remove($key) {
if( ! isset($this->data[$key])) {
$this->expand($key);
throw new InvalidKeyException();
}
$removed = $this->data[$key];
unset($this->data[$key]);
return $removed;
}
/**
* @param mixed $key
* @return boolean
*/
public function contains($key) {
return isset($this->data[$key]);
}
/**
* @param mixed $key
* @return object Doctrine_Record return a specified record
*/
public function get($key) {
if( ! isset($this->data[$key])) {
$this->expand($key);
if( ! isset($this->data[$key]))
$this->data[$key] = $this->table->create();
if(isset($this->reference_field)) {
$value = $this->reference->get($this->relation->getLocal());
if($value !== null) {
$this->data[$key]->rawSet($this->reference_field, $value);
} else {
$this->data[$key]->rawSet($this->reference_field, $this->reference);
}
}
}
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();
}
endforeach;
return $list;
}
/**
* returns all keys
* @return array
*/
public function getKeys() {
return array_keys($this->data);
}
/**
* count
* this class implements interface countable
*
* @return integer number of records in this collection
*/
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->reference_field))
$record->rawSet($this->reference_field,$this->reference);
$this->data[$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->reference_field))
$record->rawSet($this->reference_field,$this->reference);
if(in_array($record,$this->data)) {
return false;
}
if(isset($key)) {
if(isset($this->data[$key]))
return false;
$this->data[$key] = $record;
return true;
}
if(isset($this->generator)) {
$key = $this->generator->getIndex($record);
$this->data[$key] = $record;
} else
$this->data[] = $record;
return true;
}
/**
* populate
*
* @param Doctrine_Query $query
* @param integer $key
*/
public function populate(Doctrine_Hydrate $query) {
$name = $this->table->getComponentName();
if($this instanceof Doctrine_Collection_Immediate ||
$this instanceof Doctrine_Collection_Offset) {
$data = $query->getData($name);
if(is_array($data)) {
foreach($data as $k=>$v):
$this->table->setData($v);
$this->add($this->table->getRecord());
endforeach;
}
} elseif($this instanceof Doctrine_Collection_Batch) {
$this->data = $query->getData($name);
if(isset($this->generator)) {
foreach($this->data as $k => $v) {
$record = $this->get($k);
$i = $this->generator->getIndex($record);
$this->data[$i] = $record;
unset($this->data[$k]);
}
}
}
}
/**
* getNormalIterator
* returns normal iterator - an iterator that will not expand this collection
*
* @return Doctrine_Iterator_Normal
*/
public function getNormalIterator() {
return new Doctrine_Iterator_Normal($this);
}
/**
* save
* saves all records
*
* @return void
*/
public function save() {
$this->table->getSession()->saveCollection($this);
}
/**
* single shot delete
* deletes all records from this collection
* uses only one database query to perform this operation
* @return boolean
*/
public function delete() {
$ids = $this->table->getSession()->deleteCollection($this);
$this->data = array();
}
/**
* 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);
}
}
?>