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doctrine2/Doctrine/Query.php

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<?php
require_once("Access.php");
/**
* Doctrine_Query
*
* @package Doctrine ORM
* @url www.phpdoctrine.com
* @license LGPL
* @version 1.0 alpha
*/
class Doctrine_Query extends Doctrine_Access {
/**
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* @var array $fetchmodes an array containing all fetchmodes
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*/
private $fetchModes = array();
/**
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* @var array $tables an array containing all the tables used in the query
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*/
private $tables = array();
/**
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* @var array $collections an array containing all collections this parser has created/will create
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*/
private $collections = array();
private $joined = array();
private $joins = array();
/**
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* @var array $data fetched data
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*/
private $data = array();
/**
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* @var Doctrine_Session $session Doctrine_Session object
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*/
private $session;
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/**
* @var Doctrine_View $view Doctrine_View object
*/
private $view;
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private $inheritanceApplied = false;
private $aggregate = false;
/**
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* @var array $connectors component connectors
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*/
private $connectors = array();
/**
* @var array $tableAliases
*/
private $tableAliases = array();
/**
* @var array $tableIndexes
*/
private $tableIndexes = array();
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/**
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* @var array $dql DQL query string parts
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*/
protected $dql = array(
"columns" => array(),
"from" => array(),
"join" => array(),
"where" => array(),
"group" => array(),
"having" => array(),
"orderby" => array(),
"limit" => false,
"offset" => false,
);
/**
* @var array $parts SQL query string parts
*/
protected $parts = array(
"columns" => array(),
"from" => array(),
"join" => array(),
"where" => array(),
"group" => array(),
"having" => array(),
"orderby" => array(),
"limit" => false,
"offset" => false,
);
/**
* constructor
*
* @param Doctrine_Session $session
*/
public function __construct(Doctrine_Session $session) {
$this->session = $session;
}
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/**
* @return Doctrine_Session
*/
public function getSession() {
return $this->session;
}
/**
* 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
*/
public function setView(Doctrine_View $view) {
$this->view = $view;
}
/**
* getView
*
* @return Doctrine_View
*/
public function getView() {
return $this->view;
}
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/**
* clear
* resets all the variables
*
* @return void
*/
private function clear() {
$this->fetchModes = array();
$this->tables = array();
$this->parts = array(
"columns" => array(),
"from" => array(),
"join" => array(),
"where" => array(),
"group" => array(),
"having" => array(),
"orderby" => array(),
"limit" => false,
"offset" => false,
);
$this->inheritanceApplied = false;
$this->aggregate = false;
$this->data = array();
$this->connectors = array();
$this->collections = array();
$this->joined = array();
$this->joins = array();
}
/**
* loadFields
* loads fields for a given table and
* constructs a little bit of sql for every field
*
* fields of the tables become: [tablename].[fieldname] as [tablename]__[fieldname]
*
* @access private
* @param object Doctrine_Table $table a Doctrine_Table object
* @param integer $fetchmode fetchmode the table is using eg. Doctrine::FETCH_LAZY
* @param array $names fields to be loaded (only used in lazy property loading)
* @return void
*/
private function loadFields(Doctrine_Table $table, $fetchmode, array $names) {
$name = $table->getComponentName();
switch($fetchmode):
case Doctrine::FETCH_OFFSET:
$this->limit = $table->getAttribute(Doctrine::ATTR_COLL_LIMIT);
case Doctrine::FETCH_IMMEDIATE:
if( ! empty($names))
throw new Doctrine_Exception("Lazy property loading can only be used with fetching strategies lazy, batch and lazyoffset.");
$names = $table->getColumnNames();
break;
case Doctrine::FETCH_LAZY_OFFSET:
$this->limit = $table->getAttribute(Doctrine::ATTR_COLL_LIMIT);
case Doctrine::FETCH_LAZY:
case Doctrine::FETCH_BATCH:
$names = array_merge($table->getPrimaryKeys(), $names);
break;
default:
throw new Doctrine_Exception("Unknown fetchmode.");
endswitch;
$component = $table->getComponentName();
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$this->fetchModes[$component] = $fetchmode;
$tablename = $this->tableAliases[$component];
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$count = count($this->tables);
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foreach($names as $name) {
if($count == 0) {
$this->parts["columns"][] = $tablename.".".$name;
} else {
$this->parts["columns"][] = $tablename.".".$name." AS ".$component."__".$name;
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}
}
}
/**
* sets a query part
*
* @param string $name
* @param array $args
* @return void
*/
public function __call($name, $args) {
$name = strtolower($name);
if(isset($this->parts[$name])) {
$method = "parse".ucwords($name);
switch($name):
case "where":
$this->parts[$name] = array($this->$method($args[0]));
break;
case "limit":
case "offset":
if($args[0] == null)
$args[0] = false;
$this->parts[$name] = $args[0];
break;
case "from":
$this->parts['columns'] = array();
$this->parts['join'] = array();
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$this->joins = array();
$this->tables = array();
$this->fetchModes = array();
default:
$this->parts[$name] = array();
$this->$method($args[0]);
endswitch;
}
return $this;
}
/**
* returns a query part
*
* @param $name query part name
* @return mixed
*/
public function get($name) {
if( ! isset($this->parts[$name]))
return false;
return $this->parts[$name];
}
/**
* sets a query part
*
* @param $name query part name
* @param $value query part value
* @return boolean
*/
public function set($name, $value) {
if(isset($this->parts[$name])) {
$method = "parse".ucwords($name);
switch($name):
case "where":
$this->parts[$name] = array($this->$method($value));
break;
case "limit":
case "offset":
if($value == null)
$value = false;
$this->parts[$name] = $value;
break;
case "from":
$this->parts['columns'] = array();
$this->parts['join'] = array();
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$this->joins = array();
$this->tables = array();
$this->fetchModes = array();
default:
$this->parts[$name] = array();
$this->$method($value);
endswitch;
return true;
}
return false;
}
/**
* returns the built sql query
*
* @return string
*/
final public function getQuery() {
if(empty($this->parts["columns"]) || empty($this->parts["from"]))
return false;
// build the basic query
$q = "SELECT ".implode(", ",$this->parts["columns"]).
" FROM ";
foreach($this->parts["from"] as $tname => $bool) {
$a[] = $tname;
}
$q .= implode(", ",$a);
if( ! empty($this->parts['join'])) {
foreach($this->parts['join'] as $part) {
$q .= " ".implode(' ', $part);
}
}
$this->applyInheritance();
if( ! empty($this->parts["where"]))
$q .= " WHERE ".implode(" ",$this->parts["where"]);
if( ! empty($this->parts["orderby"]))
$q .= " ORDER BY ".implode(", ",$this->parts["orderby"]);
if( ! empty($this->parts["limit"]) || ! empty($this->offset))
$q = $this->session->modifyLimitQuery($q,$this->parts["limit"],$this->offset);
return $q;
}
/**
* sql delete for mysql
*/
final public function buildDelete() {
if(empty($this->parts["columns"]) || empty($this->parts["from"]))
return false;
$a = array_merge(array_keys($this->parts["from"]),$this->joined);
$q = "DELETE ".implode(", ",$a)." FROM ";
$a = array();
foreach($this->parts["from"] as $tname => $bool) {
$str = $tname;
if(isset($this->parts["join"][$tname]))
$str .= " ".$this->parts["join"][$tname];
$a[] = $str;
}
$q .= implode(", ",$a);
$this->applyInheritance();
if( ! empty($this->parts["where"]))
$q .= " WHERE ".implode(" ",$this->parts["where"]);
if( ! empty($this->parts["orderby"]))
$q .= " ORDER BY ".implode(", ",$this->parts["orderby"]);
if( ! empty($this->parts["limit"]) && ! empty($this->offset))
$q = $this->session->modifyLimitQuery($q,$this->parts["limit"],$this->offset);
return $q;
}
/**
* applyInheritance
* applies column aggregation inheritance to DQL query
*
* @return boolean
*/
final public function applyInheritance() {
if($this->inheritanceApplied)
return false;
// get the inheritance maps
$array = array();
foreach($this->tables as $table):
$component = $table->getComponentName();
$tableName = $this->tableAliases[$component];
$array[$tableName][] = $table->getInheritanceMap();
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endforeach;
// apply inheritance maps
$str = "";
$c = array();
foreach($array as $tname => $maps) {
$a = array();
foreach($maps as $map) {
$b = array();
foreach($map as $field => $value) {
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$b[] = $tname.".$field = $value";
}
if( ! empty($b)) $a[] = implode(" AND ",$b);
}
if( ! empty($a)) $c[] = implode(" || ",$a);
}
$str .= implode(" || ",$c);
$this->addWhere($str);
$this->inheritanceApplied = true;
return true;
}
/**
* @param string $where
* @return boolean
*/
final public function addWhere($where) {
if(empty($where))
return false;
if($this->parts["where"]) {
$this->parts["where"][] = "AND (".$where.")";
} else {
$this->parts["where"][] = "(".$where.")";
}
return true;
}
/**
* getData
* @param $key the component name
* @return array the data row for the specified component
*/
final public function getData($key) {
if(isset($this->data[$key]) && is_array($this->data[$key]))
return $this->data[$key];
return array();
}
/**
* execute
* executes the dql query and populates all collections
*
* @param string $params
* @return Doctrine_Collection the root collection
*/
public function execute($params = array()) {
$this->data = array();
$this->collections = array();
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if( ! $this->view)
$query = $this->getQuery();
else
$query = $this->view->getSelectSql();
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switch(count($this->tables)):
case 0:
throw new DQLException();
break;
case 1:
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$keys = array_keys($this->tables);
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$name = $this->tables[$keys[0]]->getComponentName();
$stmt = $this->session->execute($query,$params);
while($data = $stmt->fetch(PDO::FETCH_ASSOC)):
foreach($data as $key => $value):
$e = explode("__",$key);
if(count($e) > 1) {
$data[$e[1]] = $value;
} else {
$data[$e[0]] = $value;
}
unset($data[$key]);
endforeach;
$this->data[$name][] = $data;
endwhile;
return $this->getCollection($keys[0]);
break;
default:
$query = $this->getQuery();
$keys = array_keys($this->tables);
$root = $keys[0];
$stmt = $this->session->execute($query,$params);
$previd = array();
$coll = $this->getCollection($root);
$prev[$root] = $coll;
$array = $this->parseData($stmt);
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$colls = array();
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foreach($array as $data) {
/**
* remove duplicated data rows and map data into objects
*/
foreach($data as $key => $row) {
if(empty($row))
continue;
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$ids = $this->tables[$key]->getIdentifier();
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$emptyID = false;
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if(is_array($ids)) {
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foreach($ids as $id) {
if($row[$id] == null) {
$emptyID = true;
break;
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}
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}
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} else {
if($row[$ids] === null)
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$emptyID = true;
}
$name = $this->tables[$key]->getComponentName();
if($emptyID) {
$pointer = $this->joins[$name];
$alias = $this->tables[$pointer]->getAlias($name);
$fk = $this->tables[$pointer]->getForeignKey($alias);
$last = $prev[$pointer]->getLast();
switch($fk->getType()):
case Doctrine_Relation::ONE_COMPOSITE:
case Doctrine_Relation::ONE_AGGREGATE:
break;
default:
if($last instanceof Doctrine_Record) {
if( ! $last->hasReference($alias)) {
$prev[$name] = $this->getCollection($name);
$last->initReference($prev[$name],$this->connectors[$name]);
}
}
endswitch;
continue;
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}
if( ! isset($previd[$name]))
$previd[$name] = array();
if($previd[$name] !== $row) {
// set internal data
$this->tables[$name]->setData($row);
// initialize a new record
$record = $this->tables[$name]->getRecord();
if($name == $root) {
// add record into root collection
$coll->add($record);
} else {
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$pointer = $this->joins[$name];
$alias = $this->tables[$pointer]->getAlias($name);
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$fk = $this->tables[$pointer]->getForeignKey($alias);
$last = $prev[$pointer]->getLast();
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switch($fk->getType()):
case Doctrine_Relation::ONE_COMPOSITE:
case Doctrine_Relation::ONE_AGGREGATE:
// one-to-one relation
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$last->internalSet($this->connectors[$name]->getLocal(), $record->getID());
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$last->initSingleReference($record);
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$prev[$name] = $record;
break;
default:
// one-to-many relation or many-to-many relation
if( ! $last->hasReference($alias)) {
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$prev[$name] = $this->getCollection($name);
$last->initReference($prev[$name],$this->connectors[$name]);
} else {
// previous entry found from identityMap
$prev[$name] = $last->get($alias);
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}
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$last->addReference($record);
endswitch;
}
}
$previd[$name] = $row;
}
}
return $coll;
endswitch;
}
/**
* parseData
* parses the data returned by PDOStatement
*
* @return array
*/
public function parseData(PDOStatement $stmt) {
$array = array();
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while($data = $stmt->fetch(PDO::FETCH_ASSOC)):
/**
* parse the data into two-dimensional array
*/
foreach($data as $key => $value):
$e = explode("__",$key);
if(count($e) > 1) {
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$data[$e[0]][$e[1]] = $value;
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} else {
$data[0][$e[0]] = $value;
}
unset($data[$key]);
endforeach;
$array[] = $data;
endwhile;
$stmt->closeCursor();
return $array;
}
/**
* returns a Doctrine_Table for given name
*
* @param string $name component name
* @return Doctrine_Table
*/
public function getTable($name) {
return $this->tables[$name];
}
/**
* getCollection
*
* @parma string $name component name
* @param integer $index
*/
private function getCollection($name) {
$table = $this->session->getTable($name);
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;
endswitch;
$coll->populate($this);
return $coll;
}
/**
* query the database with DQL (Doctrine Query Language)
*
* @param string $query DQL query
* @param array $params parameters
*/
public function query($query,$params = array()) {
$this->parseQuery($query);
if($this->aggregate) {
$keys = array_keys($this->tables);
$query = $this->getQuery();
$stmt = $this->tables[$keys[0]]->getSession()->select($query,$this->parts["limit"],$this->offset);
$data = $stmt->fetch(PDO::FETCH_ASSOC);
if(count($data) == 1) {
return current($data);
} else {
return $data;
}
} else {
return $this->execute($params);
}
}
/**
* DQL PARSER
*
* @param string $query DQL query
* @return void
*/
final public function parseQuery($query) {
$this->clear();
$e = self::bracketExplode($query," ","(",")");
$parts = array();
foreach($e as $k=>$part):
switch(strtolower($part)):
case "select":
case "from":
case "where":
case "limit":
case "offset":
$p = $part;
$parts[$part] = array();
break;
case "order":
$p = $part;
$i = $k+1;
if(isset($e[$i]) && strtolower($e[$i]) == "by") {
$parts[$part] = array();
}
break;
case "by":
continue;
default:
$parts[$p][] = $part;
endswitch;
endforeach;
foreach($parts as $k => $part) {
$part = implode(" ",$part);
switch(strtoupper($k)):
case "SELECT":
$this->parseSelect($part);
break;
case "FROM":
$this->parseFrom($part);
break;
case "WHERE":
$this->addWhere($this->parseWhere($part));
break;
case "ORDER":
$this->parseOrderBy($part);
break;
case "LIMIT":
$this->parts["limit"] = trim($part);
break;
case "OFFSET":
$this->offset = trim($part);
break;
endswitch;
}
}
/**
* DQL ORDER BY PARSER
* parses the order by part of the query string
*
* @param string $str
* @return void
*/
private function parseOrderBy($str) {
foreach(explode(",",trim($str)) as $r) {
$r = trim($r);
$e = explode(" ",$r);
$a = explode(".",$e[0]);
if(count($a) > 1) {
$field = array_pop($a);
$reference = implode(".",$a);
$name = end($a);
$this->load($reference, false);
$tname = $this->tables[$name]->getTableName();
$r = $tname.".".$field;
if(isset($e[1]))
$r .= " ".$e[1];
}
$this->parts["orderby"][] = $r;
}
}
/**
* DQL SELECT PARSER
* parses the select part of the query string
*
* @param string $str
* @return void
*/
private function parseSelect($str) {
$this->aggregate = true;
foreach(explode(",",trim($str)) as $reference) {
$e = explode(" AS ",trim($reference));
$f = explode("(",$e[0]);
$a = explode(".",$f[1]);
$field = substr(array_pop($a),0,-1);
$reference = trim(implode(".",$a));
$objTable = $this->load($reference);
if(isset($e[1]))
$s = " AS $e[1]";
$this->parts["columns"][] = $f[0]."(".$objTable->getTableName().".$field)$s";
}
}
/**
* DQL FROM PARSER
* parses the from part of the query string
* @param string $str
* @return void
*/
private function parseFrom($str) {
foreach(self::bracketExplode(trim($str),",","(",")") as $reference) {
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$reference = trim($reference);
$table = $this->load($reference);
}
}
/**
* returns Doctrine::FETCH_* constant
*
* @param string $mode
* @return integer
*/
private function parseFetchMode($mode) {
switch(strtolower($mode)):
case "i":
case "immediate":
$fetchmode = Doctrine::FETCH_IMMEDIATE;
break;
case "b":
case "batch":
$fetchmode = Doctrine::FETCH_BATCH;
break;
case "l":
case "lazy":
$fetchmode = Doctrine::FETCH_LAZY;
break;
case "o":
case "offset":
$fetchmode = Doctrine::FETCH_OFFSET;
break;
case "lo":
case "lazyoffset":
$fetchmode = Doctrine::FETCH_LAZYOFFSET;
default:
throw new DQLException("Unknown fetchmode '$mode'. The availible fetchmodes are 'i', 'b' and 'l'.");
endswitch;
return $fetchmode;
}
/**
* DQL WHERE PARSER
* parses the where part of the query string
*
*
* @param string $str
* @return string
*/
private function parseWhere($str) {
$tmp = trim($str);
$str = self::bracketTrim($tmp,"(",")");
$brackets = false;
while($tmp != $str) {
$brackets = true;
$tmp = $str;
$str = self::bracketTrim($str,"(",")");
}
$parts = self::bracketExplode($str," && ","(",")");
if(count($parts) > 1) {
$ret = array();
foreach($parts as $part) {
$ret[] = $this->parseWhere($part);
}
$r = implode(" AND ",$ret);
} else {
$parts = self::bracketExplode($str," || ","(",")");
if(count($parts) > 1) {
$ret = array();
foreach($parts as $part) {
$ret[] = $this->parseWhere($part);
}
$r = implode(" OR ",$ret);
} else {
return $this->loadWhere($parts[0]);
}
}
if($brackets)
return "(".$r.")";
else
return $r;
}
/**
* trims brackets
*
* @param string $str
* @param string $e1 the first bracket, usually '('
* @param string $e2 the second bracket, usually ')'
*/
public static function bracketTrim($str,$e1,$e2) {
if(substr($str,0,1) == $e1 && substr($str,-1) == $e2)
return substr($str,1,-1);
else
return $str;
}
/**
* bracketExplode
* usage:
* $str = (age < 20 AND age > 18) AND email LIKE 'John@example.com'
* now exploding $str with parameters $d = ' AND ', $e1 = '(' and $e2 = ')'
* would return an array:
* array("(age < 20 AND age > 18)", "email LIKE 'John@example.com'")
*
* @param string $str
* @param string $d the delimeter which explodes the string
* @param string $e1 the first bracket, usually '('
* @param string $e2 the second bracket, usually ')'
*
*/
public static function bracketExplode($str,$d,$e1,$e2) {
$str = explode("$d",$str);
$i = 0;
$term = array();
foreach($str as $key=>$val) {
if (empty($term[$i])) {
$term[$i] = trim($val);
$s1 = substr_count($term[$i],"$e1");
$s2 = substr_count($term[$i],"$e2");
if($s1 == $s2) $i++;
} else {
$term[$i] .= "$d".trim($val);
$c1 = substr_count($term[$i],"$e1");
$c2 = substr_count($term[$i],"$e2");
if($c1 == $c2) $i++;
}
}
return $term;
}
/**
* loadWhere
*
* @param string $where
*/
private function loadWhere($where) {
$e = explode(" ",$where);
$r = array_shift($e);
$a = explode(".",$r);
if(count($a) > 1) {
$field = array_pop($a);
$operator = array_shift($e);
$value = implode(" ",$e);
$reference = implode(".",$a);
$count = count($a);
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$table = $this->load($reference, false);
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$component = $table->getComponentName();
$where = $this->tableAliases[$component].".".$field." ".$operator." ".$value;
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}
return $where;
}
/**
* @param string $path the path of the loadable component
* @param integer $fetchmode optional fetchmode, if not set the components default fetchmode will be used
* @throws DQLException
*/
final public function load($path, $loadFields = true) {
$e = preg_split("/[.:]/",$path);
$index = 0;
foreach($e as $key => $fullname) {
try {
$e2 = preg_split("/[-(]/",$fullname);
$name = $e2[0];
if($key == 0) {
$table = $this->session->getTable($name);
$tname = $table->getTableName();
$this->parts["from"][$tname] = true;
$this->tableAliases[$name] = $tname;
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} else {
$index += strlen($e[($key - 1)]) + 1;
// the mark here is either '.' or ':'
$mark = substr($path,($index - 1),1);
$parent = $table->getComponentName();
if(isset($this->tableAliases[$parent])) {
$tname = $this->tableAliases[$parent];
} else
$tname = $table->getTableName();
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$fk = $table->getForeignKey($name);
$name = $fk->getTable()->getComponentName();
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$tname2 = $fk->getTable()->getTableName();
$this->connectors[$name] = $fk;
switch($mark):
case ":":
$join = 'INNER JOIN ';
break;
case ".":
$join = 'LEFT JOIN ';
break;
default:
throw new Doctrine_Exception("Unknown operator '$mark'");
endswitch;
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if($fk instanceof Doctrine_ForeignKey ||
$fk instanceof Doctrine_LocalKey) {
$this->parts["join"][$tname][$tname2] = $join.$tname2." ON ".$tname.".".$fk->getLocal()." = ".$tname2.".".$fk->getForeign();
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} elseif($fk instanceof Doctrine_Association) {
$asf = $fk->getAssociationFactory();
$assocTableName = $asf->getTableName();
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$this->parts["join"][$tname][$assocTableName] = $join.$assocTableName." ON ".$tname.".id = ".$assocTableName.".".$fk->getLocal();
if($tname == $tname2) {
$tname2 = $tname."2";
$alias = $tname." AS ".$tname2;
} else
$alias = $tname2;
$this->parts["join"][$tname][$tname2] = $join.$alias." ON ".$tname2.".id = ".$assocTableName.".".$fk->getForeign();
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}
$c = $table->getComponentName();
$this->joins[$name] = $c;
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$table = $fk->getTable();
$this->tableAliases[$name] = $tname2;
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}
if( ! isset($this->tables[$name])) {
$this->tables[$name] = $table;
if($loadFields && ! $this->aggregate) {
$fields = array();
if(strpos($fullname, "-") === false) {
$fetchmode = $table->getAttribute(Doctrine::ATTR_FETCHMODE);
if(isset($e2[1]))
$fields = explode(",",substr($e2[1],0,-1));
} else {
if(isset($e2[1])) {
$fetchmode = $this->parseFetchMode($e2[1]);
} else
$fetchmode = $table->getAttribute(Doctrine::ATTR_FETCHMODE);
if(isset($e2[2]))
$fields = explode(",",substr($e2[2],0,-1));
}
$this->loadFields($table, $fetchmode, $fields);
}
}
} catch(Exception $e) {
throw new DQLException($e->__toString());
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}
}
return $table;
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}
}
?>