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.Attachment;
022import org.apache.wiki.api.core.Page;
023
024import java.io.IOException;
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 extends WikiTagBase {
037
038    private static final long serialVersionUID = 0L;
039    
040    private String m_type;
041
042    @Override
043    public void initTag() {
044        super.initTag();
045        m_type = null;
046    }
047
048    public void setType( final String arg )
049    {
050        m_type = arg.toLowerCase();
051    }
052
053    @Override
054    public final int doWikiStartTag() throws IOException {
055        final Page page = m_wikiContext.getPage();
056        if( page != null ) {
057            if( m_type.equals( "attachment" ) && page instanceof Attachment ) {
058                return EVAL_BODY_INCLUDE;
059            }
060            if( m_type.equals( "page" ) && !( page instanceof Attachment ) ) {
061                return EVAL_BODY_INCLUDE;
062            }
063            if( m_type.equals( "weblogentry" ) && !( page instanceof Attachment ) && page.getName().contains( "_blogentry_" ) ) {
064                return EVAL_BODY_INCLUDE;
065            }
066        }
067
068        return SKIP_BODY;
069    }
070}