<?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>.
 */

namespace Doctrine\ORM\Mapping\Driver;

use Doctrine\Common\Cache\ArrayCache,
    Doctrine\Common\Annotations\AnnotationReader,
    Doctrine\DBAL\Schema\AbstractSchemaManager,
    Doctrine\ORM\Mapping\ClassMetadataInfo,
    Doctrine\ORM\Mapping\MappingException,
    Doctrine\Common\Util\Inflector;

/**
 * The PhpDriver includes php files which just populate ClassMetadataInfo
 * instances with plain php code
 *
 * @license 	http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link    	www.doctrine-project.org
 * @since   	2.0
 * @version     $Revision$
 * @author		Benjamin Eberlei <kontakt@beberlei.de>
 * @author		Guilherme Blanco <guilhermeblanco@hotmail.com>
 * @author      Jonathan H. Wage <jonwage@gmail.com>
 * @author      Roman Borschel <roman@code-factory.org>
 */
class PhpDriver implements Driver
{
    /** 
     * @var array The array of class names found and the path to the file
     */
    private $_classPaths = array();
    
    /**
     * The paths where to look for mapping files.
     *
     * @var array
     */
    protected $_paths = array();

    /**
     * The file extension of mapping documents.
     *
     * @var string
     */
    protected $_fileExtension = '.php';
    
    /** 
     * Initializes a new PhpDriver that looks in the given path(s) for mapping 
     * documents and operates in the specified operating mode. 
     *  
     * @param string|array $paths One or multiple paths where mapping documents can be found. 
     */ 
    public function __construct($paths) 
    { 
        $this->addPaths((array) $paths);
    } 

    /**
     * Append lookup paths to metadata driver.
     *
     * @param array $paths
     */
    public function addPaths(array $paths)
    {
        $this->_paths = array_unique(array_merge($this->_paths, $paths));
    }
    
    /**
     * Retrieve the defined metadata lookup paths.
     *
     * @return array
     */
    public function getPaths()
    {
        return $this->_paths;
    }

    /**
     * Get the file extension used to look for mapping files under
     *
     * @return void
     */
    public function getFileExtension()
    {
        return $this->_fileExtension;
    }

    /**
     * Set the file extension used to look for mapping files under
     *
     * @param string $fileExtension The file extension to set
     * @return void
     */
    public function setFileExtension($fileExtension)
    {
        $this->_fileExtension = $fileExtension;
    }

    /**
     * {@inheritdoc}
     */
    public function loadMetadataForClass($className, ClassMetadataInfo $metadata)
    {
        $path = $this->_classPaths[$className];

        require_once $path;
    }

    /**
     * {@inheritdoc}
     */
    public function isTransient($className)
    {
        return true;
    }

    /**
     * {@inheritDoc}
     */
    public function getAllClassNames()
    {
        $classes = array();
    
        if ($this->_paths) {
            foreach ((array) $this->_paths as $path) {
                if ( ! is_dir($path)) {
                    throw MappingException::phpDriverRequiresConfiguredDirectoryPath();
                }
            
                $iterator = new \RecursiveIteratorIterator(
                    new \RecursiveDirectoryIterator($path),
                    \RecursiveIteratorIterator::LEAVES_ONLY
                );
        
                foreach ($iterator as $file) {
                    if (($fileName = $file->getBasename($this->_fileExtension)) == $file->getBasename()) {
                        continue;
                    }
                    
                    $classes[] = $fileName;
                    $this->_classPaths[$fileName] = $file->getPathName();
                }
            }
        }
        
        return $classes;
    }
}