001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2011 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.colorizer;
021    
022    import java.util.List;
023    
024    import org.sonar.channel.Channel;
025    import org.sonar.channel.CodeReader;
026    
027    public class TokenizerDispatcher {
028    
029      private Channel[] tokenizers;
030    
031      public TokenizerDispatcher(Channel<HtmlCodeBuilder>... tokenizers) {
032        this.tokenizers = tokenizers;
033      }
034    
035      public TokenizerDispatcher(List<Channel<HtmlCodeBuilder>> tokenizers) {
036        this.tokenizers = tokenizers.toArray(new Channel[0]); // NOSONAR performance is not an issue here
037      }
038    
039      public final String colorize(String code) {
040        HtmlCodeBuilder colorizedCode = new HtmlCodeBuilder();
041        colorize(new CodeReader(code), colorizedCode);
042        return colorizedCode.toString();
043      }
044    
045      public final void colorize(CodeReader code, HtmlCodeBuilder colorizedCode) {
046        cloneNotThreadSafeTokenizers();
047        nextChar: while (code.peek() != -1) {
048          for (Channel<HtmlCodeBuilder> codeTokenizer : tokenizers) {
049            if (codeTokenizer.consume(code, colorizedCode)) {
050              continue nextChar;
051            }
052          }
053          colorizedCode.append((char) code.pop());
054        }
055      }
056    
057      private void cloneNotThreadSafeTokenizers() {
058        for (int i = 0; i < tokenizers.length; i++) {
059          if (tokenizers[i] instanceof NotThreadSafeTokenizer) {
060            tokenizers[i] = ((NotThreadSafeTokenizer) tokenizers[i]).clone();
061          }
062        }
063      }
064    }