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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.doctrine-project.org>.
*/
/**
* Doctrine_Locator_Injectable
*
* @package Doctrine
* @subpackage Doctrine_Locator
* @category Locator
* @license http://www.gnu.org/licenses/lgpl.txt LGPL
* @link http://www.doctrine-project.org
* @author Janne Vanhala <jpvanhal@cc.hut.fi>
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
* @author Eevert Saukkokoski <dmnEe0@gmail.com>
* @version $Revision$
* @since 1.0
*/
class Doctrine_Locator_Injectable
{
/**
* @var Doctrine_Locator the locator object
*/
protected $_locator;
/**
* @var array an array of bound resources
*/
protected $_resources = array();
/**
* @var Doctrine_Null $null Doctrine_Null object, used for extremely fast null value checking
*/
protected static $_null;
/**
* setLocator
* this method can be used for setting the locator object locally
*
* @param Doctrine_Locator the locator object
* @return Doctrine_Locator_Injectable this instance
*/
public function setLocator(Doctrine_Locator $locator)
{
$this->_locator = $locator;
return $this;
}
/**
* getLocator
* returns the locator associated with this object
*
* if there are no locator locally associated then
* this method tries to fetch the current global locator
*
* @return Doctrine_Locator
*/
public function getLocator()
{
if ( ! isset($this->_locator)) {
$this->_locator = Doctrine_Locator::instance();
}
return $this->_locator;
}
/**
* locate
* locates a resource by given name and returns it
*
* if the resource cannot be found locally this method tries
* to use the global locator for finding the resource
*
* @see Doctrine_Locator::locate()
* @throws Doctrine_Locator_Exception if the resource could not be found
* @param string $name the name of the resource
* @return mixed the located resource
*/
public function locate($name)
{
if (isset($this->_resources[$name])) {
if (is_object($this->_resources[$name])) {
return $this->_resources[$name];
} else {
// get the name of the concrete implementation
$concreteImpl = $this->_resources[$name];
return $this->getLocator()->locate($concreteImpl);
}
} else {
return $this->getLocator()->locate($name);
}
}
/**
* bind
* binds a resource to a name
*
* @param string $name the name of the resource to bind
* @param mixed $value the value of the resource
* @return Doctrine_Locator this object
*/
public function bind($name, $resource)
{
$this->_resources[$name] = $resource;
return $this;
}
/**
* initNullObject
* initializes the null object
*
* @param Doctrine_Null $null
* @return void
*/
public static function initNullObject(Doctrine_Null $null)
{
self::$_null = $null;
}
/**
* getNullObject
* returns the null object associated with this object
*
* @return Doctrine_Null
*/
public static function getNullObject()
{
return self::$_null;
}
}
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