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.WikiEngine;
024    import org.apache.wiki.WikiPage;
025    import org.apache.wiki.i18n.InternationalizationManager;
026    import org.apache.wiki.parser.MarkupParser;
027    import org.apache.wiki.parser.WikiDocument;
028    import org.apache.wiki.preferences.Preferences;
029    import org.apache.wiki.render.RenderingManager;
030    import org.apache.wiki.util.TextUtil;
031    
032    /**
033     *  Writes the author name of the current page, including a link to that page,
034     *  if that page exists.
035     *
036     *  @since 2.0
037     */
038    public class AuthorTag
039        extends WikiTagBase
040    {
041        private static final long serialVersionUID = 0L;
042        
043        /**
044         *  {@inheritDoc}
045         */
046        @Override
047        public final int doWikiStartTag()
048            throws IOException
049        {
050            WikiEngine engine = m_wikiContext.getEngine();
051            WikiPage   page   = m_wikiContext.getPage();
052    
053            String author = page.getAuthor();
054    
055            if( author != null && author.length() > 0 )
056            {
057                author = TextUtil.replaceEntities(author);
058                if( engine.pageExists(author) )
059                {
060                    // FIXME: It's very boring to have to do this.
061                    //        Slow, too.
062    
063                    RenderingManager mgr = engine.getRenderingManager();
064                    
065                    MarkupParser p = mgr.getParser( m_wikiContext, "["+author+"|"+author+"]" );
066    
067                    WikiDocument d = p.parse();
068                    
069                    author = mgr.getHTML( m_wikiContext, d );
070                }
071    
072                pageContext.getOut().print( author );
073            }
074            else
075            {
076                pageContext.getOut().print( Preferences.getBundle( m_wikiContext, InternationalizationManager.CORE_BUNDLE )
077                                                       .getString( "common.unknownauthor" ) );
078            }
079    
080            return SKIP_BODY;
081        }
082    }