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doctrine2/lib/Doctrine/Hydrate.php

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<?php
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/*
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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>.
*/
Doctrine::autoload('Doctrine_Access');
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/**
* Doctrine_Hydrate is a base class for Doctrine_RawSql and Doctrine_Query.
* Its purpose is to populate object graphs.
*
*
* @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>
*/
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abstract class Doctrine_Hydrate extends Doctrine_Access
{
/**
* QUERY TYPE CONSTANTS
*/
/**
* constant for SELECT queries
*/
const SELECT = 0;
/**
* constant for DELETE queries
*/
const DELETE = 1;
/**
* constant for UPDATE queries
*/
const UPDATE = 2;
/**
* constant for INSERT queries
*/
const INSERT = 3;
/**
* constant for CREATE queries
*/
const CREATE = 4;
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/**
* @var array $fetchmodes an array containing all fetchmodes
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*/
protected $fetchModes = array();
/**
* @var array $tables an array containing all the tables used in the query
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*/
protected $tables = array();
/**
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* @var array $collections an array containing all collections
* this hydrater has created/will create
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*/
protected $collections = array();
/**
* @var array $joins an array containing all table joins
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*/
protected $joins = array();
/**
* @var array $params query input parameters
*/
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protected $params = array();
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/**
* @var Doctrine_Connection $conn Doctrine_Connection object
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*/
protected $conn;
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/**
* @var Doctrine_View $view Doctrine_View object
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*/
protected $view;
/**
* @var boolean $inheritanceApplied
*/
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protected $inheritanceApplied = false;
/**
* @var boolean $aggregate
*/
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protected $aggregate = false;
/**
* @var array $compAliases
*/
protected $compAliases = array();
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/**
* @var array $tableAliases
*/
protected $tableAliases = array();
/**
* @var array $tableIndexes
*/
protected $tableIndexes = array();
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protected $pendingAggregates = array();
/**
* @var array $aggregateMap an array containing all aggregate aliases, keys as dql aliases
* and values as sql aliases
*/
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protected $aggregateMap = array();
/**
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* @var Doctrine_Hydrate_Alias $aliasHandler
*/
protected $aliasHandler;
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/**
* @var array $parts SQL query string parts
*/
protected $parts = array(
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'select' => array(),
'from' => array(),
'set' => array(),
'join' => array(),
'where' => array(),
'groupby' => array(),
'having' => array(),
'orderby' => array(),
'limit' => false,
'offset' => false,
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);
/**
* @var integer $type the query type
*
* @see Doctrine_Query::* constants
*/
protected $type = self::SELECT;
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/**
* constructor
*
* @param Doctrine_Connection|null $connection
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*/
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public function __construct($connection = null)
{
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if ( ! ($connection instanceof Doctrine_Connection)) {
$connection = Doctrine_Manager::getInstance()->getCurrentConnection();
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}
$this->conn = $connection;
$this->aliasHandler = new Doctrine_Hydrate_Alias();
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}
/**
* getComponentAliases
*
* @return array
*/
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public function getComponentAliases()
{
return $this->compAliases;
}
/**
* getTableAliases
*
* @return array
*/
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public function getTableAliases()
{
return $this->tableAliases;
}
/**
* getTableIndexes
*
* @return array
*/
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public function getTableIndexes()
{
return $this->tableIndexes;
}
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/**
* getTables
*
* @return array
*/
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public function getTables()
{
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return $this->tables;
}
/**
* copyAliases
*
* @return void
*/
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public function copyAliases(Doctrine_Hydrate $query)
{
$this->compAliases = $query->getComponentAliases();
$this->tableAliases = $query->getTableAliases();
$this->tableIndexes = $query->getTableIndexes();
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return $this;
}
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public function getPathAlias($path)
{
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$s = array_search($path, $this->compAliases);
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if ($s === false)
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return $path;
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return $s;
}
/**
* createSubquery
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*
* @return Doctrine_Hydrate
*/
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public function createSubquery()
{
$class = get_class($this);
$obj = new $class();
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// copy the aliases to the subquery
$obj->copyAliases($this);
return $obj;
}
/**
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* getQuery
*
* @return string
*/
abstract public function getQuery();
/**
* limitSubqueryUsed
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*
* @return boolean
*/
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public function isLimitSubqueryUsed()
{
return false;
}
/**
* remove
*
* @param $name
*/
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public function remove($name)
{
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if (isset($this->parts[$name])) {
if ($name == "limit" || $name == "offset") {
$this->parts[$name] = false;
} else {
$this->parts[$name] = array();
}
}
return $this;
}
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/**
* clear
* resets all the variables
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*
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* @return void
*/
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protected function clear()
{
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$this->fetchModes = array();
$this->tables = array();
$this->parts = array(
"select" => array(),
"from" => array(),
"join" => array(),
"where" => array(),
"groupby" => array(),
"having" => array(),
"orderby" => array(),
"limit" => false,
"offset" => false,
);
$this->inheritanceApplied = false;
$this->aggregate = false;
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$this->collections = array();
$this->joins = array();
$this->tableIndexes = array();
$this->tableAliases = array();
$this->aliasHandler->clear();
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}
/**
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* getConnection
*
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* @return Doctrine_Connection
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*/
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public function getConnection()
{
return $this->conn;
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}
/**
* setView
* sets a database view this query object uses
* this method should only be called internally by doctrine
*
* @param Doctrine_View $view database view
* @return void
*/
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public function setView(Doctrine_View $view)
{
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$this->view = $view;
}
/**
* getView
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* returns the view associated with this query object (if any)
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*
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* @return Doctrine_View the view associated with this query object
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*/
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public function getView()
{
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return $this->view;
}
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/**
* getParams
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*
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* @return array
*/
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public function getParams()
{
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return $this->params;
}
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/**
* getTableAlias
*
* @param string $path
* @return string
*/
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final public function getTableAlias($path)
{
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if (isset($this->compAliases[$path])) {
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$path = $this->compAliases[$path];
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}
if ( ! isset($this->tableAliases[$path])) {
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return false;
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}
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return $this->tableAliases[$path];
}
/**
* getCollection
*
* @parma string $name component name
* @param integer $index
*/
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private function getCollection($name)
{
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$table = $this->tables[$name];
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if ( ! isset($this->fetchModes[$name])) {
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return new Doctrine_Collection($table);
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}
switch ($this->fetchModes[$name]) {
case Doctrine::FETCH_BATCH:
$coll = new Doctrine_Collection_Batch($table);
break;
case Doctrine::FETCH_LAZY:
$coll = new Doctrine_Collection_Lazy($table);
break;
case Doctrine::FETCH_OFFSET:
$coll = new Doctrine_Collection_Offset($table);
break;
case Doctrine::FETCH_IMMEDIATE:
$coll = new Doctrine_Collection_Immediate($table);
break;
case Doctrine::FETCH_LAZY_OFFSET:
$coll = new Doctrine_Collection_LazyOffset($table);
break;
default:
throw new Doctrine_Exception("Unknown fetchmode");
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};
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return $coll;
}
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/**
* setParams
*
* @param array $params
*/
public function setParams(array $params = array()) {
$this->params = $params;
}
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/**
* execute
* executes the dql query and populates all collections
*
* @param string $params
* @return Doctrine_Collection the root collection
*/
public function execute($params = array(), $return = Doctrine::FETCH_RECORD) {
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$this->collections = array();
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$params = $this->conn->convertBooleans(array_merge($this->params, $params));
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if ( ! $this->view) {
$query = $this->getQuery($params);
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} else {
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$query = $this->view->getSelectSql();
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}
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if ($this->isLimitSubqueryUsed()
&& $this->conn->getDBH()->getAttribute(PDO::ATTR_DRIVER_NAME) !== 'mysql'
) {
$params = array_merge($params, $params);
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}
$stmt = $this->conn->execute($query, $params);
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if ($this->aggregate) {
return $stmt->fetchAll(Doctrine::FETCH_ASSOC);
}
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if (count($this->tables) == 0) {
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throw new Doctrine_Query_Exception("No components selected");
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}
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$keys = array_keys($this->tables);
$root = $keys[0];
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$previd = array();
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$coll = $this->getCollection($root);
$prev[$root] = $coll;
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if ($this->aggregate)
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$return = Doctrine::FETCH_ARRAY;
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$array = $this->parseData($stmt);
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if ($return == Doctrine::FETCH_ARRAY)
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return $array;
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foreach ($array as $data) {
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/**
* remove duplicated data rows and map data into objects
*/
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foreach ($data as $key => $row) {
if (empty($row)) {
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continue;
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}
//$key = array_search($key, $this->shortAliases);
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foreach ($this->tables as $k => $t) {
if ( ! strcasecmp($key, $k)) {
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$key = $k;
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}
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}
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if ( !isset($this->tables[$key]) ) {
throw new Doctrine_Exception('No table named ' . $key . ' found.');
}
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$ids = $this->tables[$key]->getIdentifier();
$name = $key;
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if ($this->isIdentifiable($row, $ids)) {
if ($name !== $root) {
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$prev = $this->initRelated($prev, $name);
}
// aggregate values have numeric keys
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if (isset($row[0])) {
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$component = $this->tables[$name]->getComponentName();
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// if the collection already has objects, get the last object
// otherwise create a new one where the aggregate values are being mapped
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if ($prev[$name]->count() > 0) {
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$record = $prev[$name]->getLast();
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} else {
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$record = new $component();
$prev[$name]->add($record);
}
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$path = array_search($name, $this->tableAliases);
$alias = $this->getPathAlias($path);
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// map each aggregate value
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foreach ($row as $index => $value) {
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$agg = false;
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if (isset($this->pendingAggregates[$alias][$index])) {
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$agg = $this->pendingAggregates[$alias][$index][3];
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}
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$record->mapValue($agg, $value);
}
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}
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continue;
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}
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if ( ! isset($previd[$name])) {
$previd[$name] = array();
}
if ($previd[$name] !== $row) {
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// set internal data
$this->tables[$name]->setData($row);
// initialize a new record
$record = $this->tables[$name]->getRecord();
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// aggregate values have numeric keys
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if (isset($row[0])) {
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$path = array_search($name, $this->tableAliases);
$alias = $this->getPathAlias($path);
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// map each aggregate value
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foreach ($row as $index => $value) {
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$agg = false;
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if (isset($this->pendingAggregates[$alias][$index])) {
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$agg = $this->pendingAggregates[$alias][$index][3];
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}
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$record->mapValue($agg, $value);
}
}
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if ($name == $root) {
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// add record into root collection
$coll->add($record);
unset($previd);
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} else {
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$prev = $this->addRelated($prev, $name, $record);
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}
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// following statement is needed to ensure that mappings
// are being done properly when the result set doesn't
// contain the rows in 'right order'
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if ($prev[$name] !== $record)
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$prev[$name] = $record;
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}
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$previd[$name] = $row;
}
}
return $coll;
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}
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/**
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* initRelation
*
* @param array $prev
* @param string $name
* @return array
*/
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public function initRelated(array $prev, $name)
{
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$pointer = $this->joins[$name];
$path = array_search($name, $this->tableAliases);
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$tmp = explode('.', $path);
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$alias = end($tmp);
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if ( ! isset($prev[$pointer]) ) {
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return $prev;
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}
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$fk = $this->tables[$pointer]->getRelation($alias);
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if ( ! $fk->isOneToOne()) {
if ($prev[$pointer]->getLast() instanceof Doctrine_Record) {
if ( ! $prev[$pointer]->getLast()->hasReference($alias)) {
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$prev[$name] = $this->getCollection($name);
$prev[$pointer]->getLast()->initReference($prev[$name],$fk);
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} else {
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$prev[$name] = $prev[$pointer]->getLast()->get($alias);
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}
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}
}
return $prev;
}
/**
* addRelated
*
* @param array $prev
* @param string $name
* @return array
*/
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public function addRelated(array $prev, $name, Doctrine_Record $record)
{
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$pointer = $this->joins[$name];
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$path = array_search($name, $this->tableAliases);
$tmp = explode('.', $path);
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$alias = end($tmp);
$fk = $this->tables[$pointer]->getRelation($alias);
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if ($fk->isOneToOne()) {
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$prev[$pointer]->getLast()->set($fk->getAlias(), $record);
$prev[$name] = $record;
} else {
// one-to-many relation or many-to-many relation
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if ( ! $prev[$pointer]->getLast()->hasReference($alias)) {
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$prev[$name] = $this->getCollection($name);
$prev[$pointer]->getLast()->initReference($prev[$name], $fk);
} else {
// previous entry found from memory
$prev[$name] = $prev[$pointer]->getLast()->get($alias);
}
$prev[$pointer]->getLast()->addReference($record, $fk);
}
return $prev;
}
/**
* isIdentifiable
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* returns whether or not a given data row is identifiable (it contains
* all id fields specified in the second argument)
*
* @param array $row
* @param mixed $ids
* @return boolean
*/
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public function isIdentifiable(array $row, $ids)
{
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if (is_array($ids)) {
foreach ($ids as $id) {
if ($row[$id] == null)
return true;
}
} else {
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if ( ! isset($row[$ids])) {
return true;
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}
}
return false;
}
/**
* getType
*
* returns the type of this query object
* by default the type is Doctrine_Hydrate::SELECT but if update() or delete()
* are being called the type is Doctrine_Hydrate::UPDATE and Doctrine_Hydrate::DELETE,
* respectively
*
* @see Doctrine_Hydrate::SELECT
* @see Doctrine_Hydrate::UPDATE
* @see Doctrine_Hydrate::DELETE
*
* @return integer return the query type
*/
public function getType()
{
return $this->type;
}
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/**
* applyInheritance
* applies column aggregation inheritance to DQL / SQL query
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*
* @return string
*/
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public function applyInheritance()
{
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// get the inheritance maps
$array = array();
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foreach ($this->tables as $alias => $table) {
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$array[$alias][] = $table->inheritanceMap;
}
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// apply inheritance maps
$str = "";
$c = array();
$index = 0;
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foreach ($array as $tableAlias => $maps) {
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$a = array();
// don't use table aliases if the query isn't a select query
if ($this->type !== Doctrine_Query::SELECT) {
$tableAlias = '';
} else {
$tableAlias .= '.';
}
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foreach ($maps as $map) {
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$b = array();
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foreach ($map as $field => $value) {
if ($index > 0) {
$b[] = '(' . $tableAlias . $field . ' = ' . $value
. ' OR ' . $tableAlias . $field . ' IS NULL)';
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} else {
$b[] = $tableAlias . $field . ' = ' . $value;
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}
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}
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if ( ! empty($b)) {
$a[] = implode(' AND ', $b);
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}
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}
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if ( ! empty($a)) {
$c[] = implode(' AND ', $a);
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}
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$index++;
}
$str .= implode(' AND ', $c);
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return $str;
}
/**
* parseData
* parses the data returned by statement object
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*
* @param mixed $stmt
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* @return array
*/
public function parseData($stmt)
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{
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$array = array();
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while ($data = $stmt->fetch(PDO::FETCH_ASSOC)) {
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/**
* parse the data into two-dimensional array
*/
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foreach ($data as $key => $value) {
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$e = explode('__', $key);
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$field = strtolower(array_pop($e));
$component = strtolower(implode('__', $e));
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$data[$component][$field] = $value;
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unset($data[$key]);
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};
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$array[] = $data;
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};
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$stmt->closeCursor();
return $array;
}
/**
* returns a Doctrine_Table for given name
*
* @param string $name component name
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* @return Doctrine_Table|boolean
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*/
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public function getTable($name)
{
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if (isset($this->tables[$name])) {
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return $this->tables[$name];
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}
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return false;
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}
/**
* @return string returns a string representation of this object
*/
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public function __toString()
{
return Doctrine_Lib::formatSql($this->getQuery());
}
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}