001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2009 SonarSource SA
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.squid.text.colorizer;
021    
022    import java.util.Collections;
023    import java.util.HashSet;
024    import java.util.Set;
025    
026    import org.sonar.squid.text.CodeReader;
027    import org.sonar.squid.text.EndTokenMatcher;
028    
029    public class KeywordsTokenizer extends Tokenizer {
030    
031      private Set<String>     keywords        = new HashSet<String>();
032      private EndTokenMatcher endTokenMatcher = new EndTokenMatcher() {
033    
034                                                public boolean match(int endFlag) {
035                                                  return !Character.isJavaIdentifierPart(endFlag);
036                                                }
037                                              };
038    
039      public KeywordsTokenizer(String tagBefore, String tagAfter, Set<String> keywords) {
040        super(tagBefore, tagAfter);
041        this.keywords = keywords;
042      }
043    
044      public KeywordsTokenizer(String tagBefore, String tagAfter, String... keywords) {
045        super(tagBefore, tagAfter);
046        Collections.addAll(this.keywords, keywords);
047      }
048    
049      public KeywordsTokenizer(String keyword) {
050        this("", "", keyword);
051      }
052    
053      @Override
054      public boolean hasNextToken(CodeReader code) {
055        return Character.isJavaIdentifierStart(code.peek());
056      }
057    
058      @Override
059      public String nextToken(CodeReader code) {
060        String keyword = code.readTo(endTokenMatcher);
061        return keywords.contains(keyword) ? (tagBefore + keyword + tagAfter) : keyword;
062      }
063    
064    }