    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}