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 */ 019 package org.apache.wiki.tags; 020 021 import java.io.IOException; 022 023 import org.apache.commons.lang.StringUtils; 024 import org.apache.wiki.api.exceptions.ProviderException; 025 026 /** 027 * Includes body, if the request context matches. To understand more about 028 * RequestContexts, please look at the WikiContext class. 029 * 030 * @since 2.0 031 * @see org.apache.wiki.WikiContext 032 */ 033 public class CheckRequestContextTag 034 extends WikiTagBase 035 { 036 private static final long serialVersionUID = 0L; 037 038 private String m_context; 039 private String[] m_contextList = {}; 040 041 /** 042 * {@inheritDoc} 043 */ 044 @Override 045 public void initTag() 046 { 047 super.initTag(); 048 m_context = null; 049 m_contextList = new String[0]; 050 } 051 052 /** 053 * Returns the context. 054 * 055 * @return Return the context. 056 */ 057 public String getContext() 058 { 059 return m_context; 060 } 061 062 /** 063 * Set the context to check for. 064 * 065 * @param arg One of the RequestsContexts. 066 */ 067 public void setContext( String arg ) 068 { 069 m_context = arg; 070 071 m_contextList = StringUtils.split(arg,'|'); 072 } 073 074 /** 075 * {@inheritDoc} 076 */ 077 @Override 078 public final int doWikiStartTag() 079 throws IOException, 080 ProviderException 081 { 082 for(int i = 0; i < m_contextList.length; i++ ) 083 { 084 String ctx = m_wikiContext.getRequestContext(); 085 086 String checkedCtx = m_contextList[i]; 087 088 if( checkedCtx.length() > 0 ) 089 { 090 if( checkedCtx.charAt(0) == '!' ) 091 { 092 if( !ctx.equalsIgnoreCase(checkedCtx.substring(1) ) ) 093 { 094 return EVAL_BODY_INCLUDE; 095 } 096 } 097 else if( ctx.equalsIgnoreCase(m_contextList[i]) ) 098 { 099 return EVAL_BODY_INCLUDE; 100 } 101 } 102 } 103 104 return SKIP_BODY; 105 } 106 }