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.Engine; 022import org.apache.wiki.api.core.Page; 023import org.apache.wiki.api.exceptions.ProviderException; 024import org.apache.wiki.pages.PageManager; 025 026import java.io.IOException; 027 028/** 029 * Includes the body in case there is no such page available. 030 * 031 * @since 2.0 032 */ 033public class NoSuchPageTag extends WikiTagBase { 034 035 private static final long serialVersionUID = 0L; 036 037 private String m_pageName; 038 039 @Override 040 public void initTag() { 041 super.initTag(); 042 m_pageName = null; 043 } 044 045 public void setPage( final String name ) 046 { 047 m_pageName = name; 048 } 049 050 public String getPage() 051 { 052 return m_pageName; 053 } 054 055 @Override 056 public int doWikiStartTag() throws IOException, ProviderException { 057 final Engine engine = m_wikiContext.getEngine(); 058 final Page page; 059 060 if( m_pageName == null ) { 061 page = m_wikiContext.getPage(); 062 } else { 063 page = engine.getManager( PageManager.class ).getPage( m_pageName ); 064 } 065 066 if( page != null && engine.getManager( PageManager.class ).wikiPageExists( page.getName(), page.getVersion() ) ) { 067 return SKIP_BODY; 068 } 069 070 return EVAL_BODY_INCLUDE; 071 } 072}