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 org.apache.wiki.api.core.Page;
022
023import java.io.IOException;
024
025
026/**
027 * Writes the version of the current page.  If this is marked as the current version, then includes body as text instead of version number.
028 *
029 * @since 2.0
030 */
031public class PageVersionTag extends WikiTagBase {
032
033    private static final long serialVersionUID = 0L;
034
035    @Override
036    public final int doWikiStartTag() throws IOException {
037        final Page page = m_wikiContext.getPage();
038        if( page != null ) {
039            final int version = page.getVersion();
040            if( version > 0 ) {
041                pageContext.getOut().print( Integer.toString( version ) );
042                return SKIP_BODY;
043            }
044        }
045        return EVAL_BODY_INCLUDE;
046    }
047
048}