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    import java.util.Collection;
023    import javax.servlet.jsp.PageContext;
024    
025    /**
026     *  If there have been no search results, then outputs the body text.
027     *
028     *  @since 2.0
029     */
030    public class IfNoSearchResultsTag
031        extends WikiTagBase
032    {
033        private static final long serialVersionUID = 0L;
034        
035        public final int doWikiStartTag()
036            throws IOException
037        {
038            Collection list = (Collection)pageContext.getAttribute( "searchresults",
039                                                                    PageContext.REQUEST_SCOPE );
040            if( list == null || list.size() == 0 )
041            {   
042                return EVAL_BODY_INCLUDE;
043            }
044    
045            return SKIP_BODY;
046        }
047    }