001/* 
002    Licensed to the Apache Software Foundation (ASF) under one
003    or more contributor license agreements.  See the NOTICE file
004    distributed with this work for additional information
005    regarding copyright ownership.  The ASF licenses this file
006    to you under the Apache License, Version 2.0 (the
007    "License"); you may not use this file except in compliance
008    with the License.  You may obtain a copy of the License at
009
010       http://www.apache.org/licenses/LICENSE-2.0
011
012    Unless required by applicable law or agreed to in writing,
013    software distributed under the License is distributed on an
014    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015    KIND, either express or implied.  See the License for the
016    specific language governing permissions and limitations
017    under the License.  
018 */
019package org.apache.wiki.tags;
020
021import java.io.IOException;
022
023import org.apache.wiki.WikiPage;
024
025/**
026 *  Writes the version of the current page.  If this is
027 *  marked as the current version, then includes body as text instead of
028 *  version number.
029 *
030 *  @since 2.0
031 */
032public class PageVersionTag
033    extends WikiTagBase
034{
035    private static final long serialVersionUID = 0L;
036    
037    public final int doWikiStartTag()
038        throws IOException
039    {
040        WikiPage   page   = m_wikiContext.getPage();
041
042        if( page != null )
043        {
044            int version = page.getVersion();
045
046            if( version > 0 )
047            {
048                pageContext.getOut().print( Integer.toString(version) );
049                return SKIP_BODY;
050            }
051        }
052
053        return EVAL_BODY_INCLUDE;
054    }
055}