001 /* 002 * Copyright 1999,2004 The Apache Software Foundation. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017 package org.apache.commons.feedparser; 018 019 import java.util.Iterator; 020 import java.util.List; 021 022 import org.jaxen.jdom.JDOMXPath; 023 import org.jdom.Element; 024 025 /** 026 * Handles parsing Blogger.com changes.xml files. 027 * 028 * @author <a href="mailto:burton@apache.org">Kevin A. Burton (burtonator)</a> 029 * @version $Id: ChangesFeedParser.java 373614 2006-01-30 22:31:21Z mvdb $ 030 */ 031 public class ChangesFeedParser { 032 033 /** 034 * Parse this feed. 035 * 036 * 037 */ 038 public static void parse( FeedParserListener listener, 039 org.jdom.Document doc ) throws FeedParserException { 040 041 try { 042 043 FeedParserState state = new FeedParserState(); 044 045 FeedVersion v = new FeedVersion(); 046 v.isChanges = true; 047 listener.onFeedVersion( v ); 048 049 listener.init(); 050 051 FeedDirectoryParserListener fdpl = (FeedDirectoryParserListener)listener; 052 053 //this should be the root directory. 054 JDOMXPath xpath = new JDOMXPath( "/weblogUpdates/weblog" ); 055 List list = xpath.selectNodes( doc ); 056 057 Iterator i = list.iterator(); 058 while ( i.hasNext() ) { 059 060 Element child = (Element)i.next(); 061 onWeblog( fdpl, state, child ); 062 063 } 064 065 listener.finished(); 066 067 } catch ( Throwable t ) { throw new FeedParserException( t ); } 068 069 } 070 071 private static void onWeblog( FeedDirectoryParserListener listener, 072 FeedParserState state, 073 Element current ) throws Exception { 074 075 String weblog = current.getAttributeValue( "url" ); 076 String description = current.getAttributeValue( "name" ); 077 String title = description; 078 String feed = null; 079 080 if ( weblog == null ) 081 weblog = feed; 082 083 listener.onItem( state, title, weblog, description, feed ); 084 085 } 086 087 } 088