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/*
 * ModuleParserRSS2.java
 *
 * Created on November 20, 2005, 6:15 PM
 *
 * This library is provided under dual licenses. 
 * You may choose the terms of the Lesser General Public License or the Apache
 * License at your discretion.
 *
 *  Copyright (C) 2005  Robert Cooper, Temple of the Screaming Penguin
 *
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.   
 */

package com.sun.syndication.feed.module.cc.io;

import com.sun.syndication.feed.module.Module;
import com.sun.syndication.io.ModuleParser;
import com.sun.syndication.feed.module.cc.CreativeCommonsImpl;
import com.sun.syndication.feed.module.cc.types.License;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.jdom.Element;
import org.jdom.Namespace;

/**
 *
 * @version $Revision: 1.3 $
 * @author Robert "kebernet" Cooper
 */
public class ModuleParserRSS2 implements ModuleParser {
    
    private static final Namespace NS = Namespace.getNamespace( CreativeCommonsImpl.RSS2_URI );
    
    /** Creates a new instance of ModuleParserRSS2 */
    public ModuleParserRSS2() {
    }

    public Module parse(Element element) {
	CreativeCommonsImpl module = new CreativeCommonsImpl();
	//Do channel global
	{
	    Element root = element;
	    while( !root.getName().equals("channel") && !root.getName().equals("feed") )
		root = root.getParentElement();
	    ArrayList licenses = new ArrayList();
	    List items = null;
	    if( root.getName().equals("channel"))
		items = root.getChildren("item");
	    else
		items = root.getChildren("entry");
	    
	    Iterator iit = items.iterator();
	    while( iit.hasNext() ){
		Element item = (Element) iit.next();
		List licenseTags = item.getChildren( "license", NS );
		Iterator lit = licenseTags.iterator();
		while(lit.hasNext() ){
		    Element licenseTag = (Element) lit.next();
		    License license = License.findByValue( licenseTag.getTextTrim() );
		    if( !licenses.contains( license ));
			licenses.add( license );
		}
	    }
	    if( licenses.size() > 0 ){
		module.setAllLicenses( (License[]) licenses.toArray( new License[0] ) );
	    }
	}
	// do element local
	ArrayList licenses = new ArrayList();
	List licenseTags = element.getChildren( "license", NS );
	Iterator it = licenseTags.iterator();
	while( it.hasNext() ){
	    Element licenseTag = (Element) it.next();
	    licenses.add( License.findByValue(licenseTag.getTextTrim() ));
	}
	if( licenses.size() > 0 ){
	    module.setLicenses( (License[]) licenses.toArray( new License[0]));
	}
	
	if( module.getLicenses() != null && module.getAllLicenses() != null ){
	    return module;
	} else {
	    return null;
	}
    }

    public String getNamespaceUri() {
	return CreativeCommonsImpl.RSS2_URI;
    }
}