Source for file FromNodesAssetIterator.class.php

<?php
/**
 * @package harmoni.osid_v2.repository
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: FromNodesAssetIterator.class.php,v 1.3 2007/09/04 20:25:43 adamfranco Exp $
 */
 
require_once(dirname(__FILE__)."/HarmoniAssetIterator.class.php");
 
/**
 * The FromNodesAsset iterator lazily fetches assets as they are requested.
 * 
 * <p>
 * OSID Version: 2.0
 * </p>
 * 
 * 
 *
 * @package harmoni.osid_v2.repository
 * 
 * @copyright Copyright &copy;2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
 *
 * @version $Id: FromNodesAssetIterator.class.php,v 1.3 2007/09/04 20:25:43 adamfranco Exp $
 */
class FromNodesAssetIterator
    extends HarmoniAssetIterator
    //implements AssetIterator
 
{
    
    /**
     * Constructor
     * 
     * @param object NodeIterator $nodes 
     * @param object Repository $repository 
     * @return object 
     * @access public
     * @since 5/4/06
     */
    function FromNodesAssetIterator ( $nodes, $repository ) {
//         ArgumentValidator::validate($nodes, ExtendsValidatorRule::getRule("Iterator"));
        ArgumentValidator::validate($repository, ExtendsValidatorRule::getRule("Repository"));
        
        $this->_nodes =$nodes;
        $this->_repository =$repository;
    }
    
    /**
     * Return true if there is an additional  Asset ; false otherwise.
     *    
     * @return boolean 
     * 
     * @throws object RepositoryException An exception with one of
     *            the following messages defined in
     *            org.osid.repository.RepositoryException may be thrown: {@link }
     *            org.osid.repository.RepositoryException#OPERATION_FAILED
     *            OPERATION_FAILED}, {@link }
     *            org.osid.repository.RepositoryException#PERMISSION_DENIED
     *            PERMISSION_DENIED}, {@link }
     *            org.osid.repository.RepositoryException#CONFIGURATION_ERROR
     *            CONFIGURATION_ERROR}, {@link }
     *            org.osid.repository.RepositoryException#UNIMPLEMENTED
     *            UNIMPLEMENTED}
     * 
     * @access public
     */
    function hasNext () { 
        return $this->_nodes->hasNext();
    }
    
    /**
     * Return the next Asset.
     *    
     * @return object Asset 
     * 
     * @throws object HierarchyException An exception with one of
     *            the following messages defined in
     *            org.osid.hierarchy.HierarchyException may be thrown:     {@link }
     *            org.osid.hierarchy.HierarchyException#OPERATION_FAILED
     *            OPERATION_FAILED}, {@link }
     *            org.osid.hierarchy.HierarchyException#PERMISSION_DENIED
     *            PERMISSION_DENIED}, {@link }
     *            org.osid.hierarchy.HierarchyException#CONFIGURATION_ERROR
     *            CONFIGURATION_ERROR}, {@link }
     *            org.osid.hierarchy.HierarchyException#UNIMPLEMENTED
     *            UNIMPLEMENTED}, {@link }
     *            org.osid.hierarchy.HierarchyException#NO_MORE_ITERATOR_ELEMENTS
     *            NO_MORE_ITERATOR_ELEMENTS}
     * 
     * @access public
     */
    function next () {
        $child =$this->_nodes->next();
        return $this->_repository->getAsset($child->getId());
    } 
 
}
 
?>