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;
024import org.apache.wiki.attachment.Attachment;
025
026/**
027 *  Includes the body, if the current page is of proper type.
028 *
029 *  <B>Attributes</B>
030 *  <UL>
031 *   <LI>type - either "page", "attachment" or "weblogentry"
032 *  </UL>
033 *
034 *  @since 2.0
035 */
036public class PageTypeTag
037    extends WikiTagBase
038{
039    private static final long serialVersionUID = 0L;
040    
041    private String m_type;
042
043    public void initTag()
044    {
045        super.initTag();
046        m_type = null;
047    }
048
049    public void setType( String arg )
050    {
051        m_type = arg.toLowerCase();
052    }
053
054    public final int doWikiStartTag()
055        throws IOException
056    {
057        WikiPage   page   = m_wikiContext.getPage();
058
059        if( page != null )
060        {
061            if( m_type.equals("attachment") && page instanceof Attachment )
062            {
063                return EVAL_BODY_INCLUDE;
064            }
065            
066            if( m_type.equals("page") && !(page instanceof Attachment) )
067            {
068                return EVAL_BODY_INCLUDE;
069            }
070
071            if( m_type.equals("weblogentry") && !(page instanceof Attachment) && page.getName().indexOf("_blogentry_") != -1 )
072            {
073                return EVAL_BODY_INCLUDE;
074            }
075        }
076
077        return SKIP_BODY;
078    }
079}