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 number of the next version of the page. 027 * 028 * @since 2.2 029 */ 030public class NextVersionTag 031 extends WikiTagBase 032{ 033 private static final long serialVersionUID = 0L; 034 035 public final int doWikiStartTag() 036 throws IOException 037 { 038 WikiPage page = m_wikiContext.getPage(); 039 040 int version = page.getVersion(); 041 042 if( version == -1 ) 043 version = -1; 044 else 045 version++; 046 047 pageContext.getOut().print( version ); 048 049 return SKIP_BODY; 050 } 051}