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doctrine2/Doctrine/Query.php

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<?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>.
*/
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require_once("Hydrate.php");
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/**
* Doctrine_Query
*
* @package Doctrine ORM
* @url www.phpdoctrine.com
* @license LGPL
*/
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class Doctrine_Query extends Doctrine_Hydrate {
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/**
* count
*
* @return integer
*/
public function count(Doctrine_Table $table, $params = array()) {
$this->remove('select');
$join = $this->join;
$where = $this->where;
$having = $this->having;
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$q = "SELECT COUNT(1) FROM ".$table->getComponentName()." ";
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foreach($join as $j) {
$q .= implode(" ",$j);
}
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$string = $this->applyInheritance();
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if( ! empty($where)) {
$q .= " WHERE ".implode(" AND ",$where);
if( ! empty($string))
$q .= " AND (".$string.")";
} else {
if( ! empty($string))
$q .= " WHERE (".$string.")";
}
if( ! empty($having))
$q .= " HAVING ".implode(' AND ',$having);
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$a = $this->getSession()->execute($q, $params)->fetch(PDO::FETCH_NUM);
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return $a[0];
}
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/**
* 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
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* @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)
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* @return void
*/
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protected function loadFields(Doctrine_Table $table, $fetchmode, array $names, $cpath) {
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$name = $table->getComponentName();
switch($fetchmode):
case Doctrine::FETCH_OFFSET:
$this->limit = $table->getAttribute(Doctrine::ATTR_COLL_LIMIT);
case Doctrine::FETCH_IMMEDIATE:
if( ! empty($names))
$names = array_unique(array_merge($table->getPrimaryKeys(), $names));
else
$names = $table->getColumnNames();
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break;
case Doctrine::FETCH_LAZY_OFFSET:
$this->limit = $table->getAttribute(Doctrine::ATTR_COLL_LIMIT);
case Doctrine::FETCH_LAZY:
case Doctrine::FETCH_BATCH:
$names = array_unique(array_merge($table->getPrimaryKeys(), $names));
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break;
default:
throw new Doctrine_Exception("Unknown fetchmode.");
endswitch;
$component = $table->getComponentName();
$tablename = $this->tableAliases[$cpath];
$this->fetchModes[$tablename] = $fetchmode;
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$count = count($this->tables);
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foreach($names as $name) {
if($count == 0) {
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$this->parts["select"][] = $tablename.".".$name;
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} else {
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$this->parts["select"][] = $tablename.".".$name." AS ".$tablename."__".$name;
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}
}
}
/**
* addFrom
*
* @param strint $from
*/
public function addFrom($from) {
$class = "Doctrine_Query_From";
$parser = new $class($this);
$parser->parse($from);
}
/**
* addWhere
*
* @param string $where
*/
public function addWhere($where) {
$class = "Doctrine_Query_Where";
$parser = new $class($this);
$this->parts['where'][] = $parser->parse($where);
}
/**
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* sets a query part
*
* @param string $name
* @param array $args
* @return void
*/
public function __call($name, $args) {
$name = strtolower($name);
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if(isset($this->parts[$name])) {
$method = "parse".ucwords($name);
switch($name):
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case "from":
$this->parts['from'] = array();
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$this->parts['select'] = array();
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$this->parts['join'] = array();
$this->joins = array();
$this->tables = array();
$this->fetchModes = array();
$this->tableIndexes = array();
$this->tableAliases = array();
$class = "Doctrine_Query_".ucwords($name);
$parser = new $class($this);
$parser->parse($args[0]);
break;
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case "where":
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case "having":
case "orderby":
case "groupby":
$class = "Doctrine_Query_".ucwords($name);
$parser = new $class($this);
$this->parts[$name] = array($parser->parse($args[0]));
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break;
case "limit":
case "offset":
if($args[0] == null)
$args[0] = false;
$this->parts[$name] = $args[0];
break;
default:
$this->parts[$name] = array();
$this->$method($args[0]);
endswitch;
} else
throw new Doctrine_Query_Exception("Unknown overload method");
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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($name):
case "where":
case "having":
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$this->parts[$name] = array($this->$method($value));
break;
case "limit":
case "offset":
if($value == null)
$value = false;
$this->parts[$name] = $value;
break;
case "from":
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$this->parts['select'] = array();
$this->parts['join'] = array();
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$this->joins = array();
$this->tables = array();
$this->fetchModes = array();
$this->tableIndexes = array();
$this->tableAliases = array();
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default:
$this->parts[$name] = array();
$this->$method($value);
endswitch;
return true;
}
return false;
}
/**
* returns the built sql query
*
* @return string
*/
final public function getQuery() {
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if(empty($this->parts["select"]) || empty($this->parts["from"]))
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return false;
// build the basic query
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$q = "SELECT ".implode(", ",$this->parts["select"]).
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" FROM ";
foreach($this->parts["from"] as $tname => $bool) {
$a[] = $tname;
}
$q .= implode(", ",$a);
if( ! empty($this->parts['join'])) {
foreach($this->parts['join'] as $part) {
$q .= " ".implode(' ', $part);
}
}
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$string = $this->applyInheritance();
if( ! empty($this->parts["where"])) {
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$q .= " WHERE ".implode(" AND ",$this->parts["where"]);
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if( ! empty($string))
$q .= " AND (".$string.")";
} else {
if( ! empty($string))
$q .= " WHERE (".$string.")";
}
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$q .= ( ! empty($this->parts['groupby']))?" GROUP BY ".implode(", ",$this->parts["groupby"]):'';
$q .= ( ! empty($this->parts['having']))?" HAVING ".implode(" ",$this->parts["having"]):'';
$q .= ( ! empty($this->parts['orderby']))?" ORDER BY ".implode(" ",$this->parts["orderby"]):'';
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if( ! empty($this->parts["limit"]) || ! empty($this->offset))
$q = $this->session->modifyLimitQuery($q,$this->parts["limit"],$this->offset);
return $q;
}
/**
* 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
* parses a DQL query
* first splits the query in parts and then uses individual
* parsers for each part
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*
* @param string $query DQL query
* @return void
*/
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public function parseQuery($query) {
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$this->clear();
$e = self::bracketExplode($query," ","(",")");
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$parts = array();
foreach($e as $k=>$part):
switch(strtolower($part)):
case "select":
case "from":
case "where":
case "limit":
case "offset":
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case "having":
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$p = $part;
$parts[$part] = array();
break;
case "order":
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case "group":
$i = ($k + 1);
if(isset($e[$i]) && strtolower($e[$i]) === "by") {
$p = $part;
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$parts[$part] = array();
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} else
$parts[$p][] = $part;
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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":
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$class = "Doctrine_Query_".ucwords(strtolower($k));
$parser = new $class($this);
$parser->parse($part);
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break;
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case "GROUP":
case "ORDER":
$k .= "by";
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case "WHERE":
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case "HAVING":
$class = "Doctrine_Query_".ucwords(strtolower($k));
$parser = new $class($this);
$name = strtolower($k);
$this->parts[$name][] = $parser->parse($part);
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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 $str
* @return void
*/
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final public function parseOrderBy($str) {
$parser = new Doctrine_Query_Part_Orderby($this);
return $parser->parse($str);
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}
/**
* returns Doctrine::FETCH_* constant
*
* @param string $mode
* @return integer
*/
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final public function parseFetchMode($mode) {
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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;
}
/**
* 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;
}
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/**
* generateAlias
*
* @param string $tableName
* @return string
*/
final public function generateAlias($tableName) {
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if(isset($this->tableIndexes[$tableName])) {
return $tableName.++$this->tableIndexes[$tableName];
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} else {
$this->tableIndexes[$tableName] = 1;
return $tableName;
}
}
/**
* loads a component
*
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* @param string $path the path of the loadable component
* @param integer $fetchmode optional fetchmode, if not set the components default fetchmode will be used
* @throws DQLException
* @return Doctrine_Table
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*/
final public function load($path, $loadFields = true) {
$e = preg_split("/[.:]/",$path);
$index = 0;
$currPath = '';
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foreach($e as $key => $fullname) {
try {
$copy = $e;
$e2 = preg_split("/[-(]/",$fullname);
$name = $e2[0];
$currPath .= ".".$name;
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if($key == 0) {
$currPath = substr($currPath,1);
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$table = $this->session->getTable($name);
$tname = $table->getTableName();
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if( ! isset($this->tableAliases[$currPath]))
$this->tableIndexes[$tname] = 1;
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$this->parts["from"][$tname] = true;
$this->tableAliases[$currPath] = $tname;
$tableName = $tname;
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} else {
$index += strlen($e[($key - 1)]) + 1;
// the mark here is either '.' or ':'
$mark = substr($path,($index - 1),1);
if(isset($this->tableAliases[$prevPath])) {
$tname = $this->tableAliases[$prevPath];
} else
$tname = $table->getTableName();
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$fk = $table->getForeignKey($name);
$name = $fk->getTable()->getComponentName();
$original = $fk->getTable()->getTableName();
if(isset($this->tableAliases[$currPath])) {
$tname2 = $this->tableAliases[$currPath];
} else
$tname2 = $this->generateAlias($original);
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if($original !== $tname2)
$aliasString = $original." AS ".$tname2;
else
$aliasString = $original;
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switch($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 ||
$fk instanceof Doctrine_LocalKey) {
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$this->parts["join"][$tname][$tname2] = $join.$aliasString." 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();
$this->parts["join"][$tname][$tname2] = $join.$aliasString." ON ".$tname2.".id = ".$assocTableName.".".$fk->getForeign();
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}
$this->joins[$tname2] = $prevTable;
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$table = $fk->getTable();
$this->tableAliases[$currPath] = $tname2;
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$tableName = $tname2;
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}
if( ! isset($this->tables[$tableName])) {
$this->tables[$tableName] = $table;
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if($loadFields && ! $this->aggregate) {
$this->parseFields($fullname, $tableName, $e2, $currPath);
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}
}
$prevPath = $currPath;
$prevTable = $tableName;
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} catch(Exception $e) {
throw new DQLException($e->__toString());
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}
}
return $table;
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}
/**
* parseFields
*
* @param string $fullName
* @param string $tableName
* @param array $exploded
* @param string $currPath
* @return void
*/
final public function parseFields($fullName, $tableName, $exploded, $currPath) {
$table = $this->tables[$tableName];
$fields = array();
if(strpos($fullName, "-") === false) {
$fetchmode = $table->getAttribute(Doctrine::ATTR_FETCHMODE);
if(isset($exploded[1]))
$fields = explode(",",substr($exploded[1],0,-1));
} else {
if(isset($exploded[1])) {
$fetchmode = $this->parseFetchMode($exploded[1]);
} else
$fetchmode = $table->getAttribute(Doctrine::ATTR_FETCHMODE);
if(isset($exploded[2]))
$fields = explode(",",substr($exploded[2],0,-1));
}
$this->loadFields($table, $fetchmode, $fields, $currPath);
}
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}
?>