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.wiki.WikiPage;
024    import 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     */
036    public 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    }