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.colorizer;
021    
022    import java.util.Collections;
023    import java.util.HashSet;
024    import java.util.Set;
025    
026    /**
027     * Detect case-sensitive keywords
028     */
029    public class KeywordsTokenizer extends Tokenizer {
030    
031      private Set<String> keywords = new HashSet<String>();
032    
033      public KeywordsTokenizer(String tagBefore, String tagAfter, Set<String> keywords) {
034        super(tagBefore, tagAfter);
035        this.keywords = keywords;
036      }
037    
038      public KeywordsTokenizer(String tagBefore, String tagAfter, String... keywords) {
039        super(tagBefore, tagAfter);
040        Collections.addAll(this.keywords, keywords);
041      }
042    
043      @Override
044      public boolean hasNextToken(CodeReader code) {
045        int lastChar = code.lastChar();
046        int firstChar = code.peek();
047        if (Character.isLetter(firstChar) && !Character.isJavaIdentifierPart(lastChar)) {
048          String word = code.peekTo(endTokenMatcher);
049          for (String keyword : keywords) {
050            if (checkKeyword(word, keyword)) {
051              return true;
052            }
053          }
054        }
055        return false;
056      }
057    
058      protected boolean checkKeyword(String word, String keyword) {
059        return word.equals(keyword);
060      }
061    
062      @Override
063      public String nextToken(CodeReader code) {
064        return code.popTo(endTokenMatcher);
065      }
066    
067      private EndTokenMatcher endTokenMatcher = new EndTokenMatcher() {
068    
069        public boolean match(int endFlag) {
070          return !Character.isJavaIdentifierPart(endFlag);
071        }
072      };
073    
074    }