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doctrine2/draft/Tree.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>.
*/
/**
* Doctrine_Tree
*
* @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 Joe Simms <joe.simms@websites4.com>
*/
class Doctrine_Tree
{
/**
* @param object $table reference to associated Doctrine_Table instance
*/
protected $table;
/**
* @param array $options
*/
protected $options;
/**
* constructor, creates tree with reference to table and any options
*
* @param object $table instance of Doctrine_Table
* @param array $options options
*/
public function __construct(Doctrine_Table $table, $options)
{
$this->table = $table;
$this->options = $options;
}
/**
* Used to define table attributes required for the given implementation
*
* @throws Doctrine_Tree_Exception if table attributes have not been defined
*/
public function setTableDefinition()
{
throw new Doctrine_Tree_Exception('Table attributes have not been defined for this Tree implementation.');
}
/**
* this method is used for setting up relations and attributes and should be used by specific implementations
*
*/
public function setUp()
{
}
/**
* factory method to return tree instance based upon chosen implementation
*
* @param object $table instance of Doctrine_Table
* @param string $impName implementation (NestedSet, AdjacencyList, MaterializedPath)
* @param array $options options
* @return object $options instance of Doctrine_Node
* @throws Doctrine_Exception if class does not extend Doctrine_Tree
*/
public static function factory(Doctrine_Table $table, $implName, $options = array())
{
$class = 'Doctrine_Tree_' . $implName;
if (!class_exists($class)) {
throw new Doctrine_Exception('The chosen class must extend Doctrine_Tree');
}
return new $class($table, $options);
}
}