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    /**
023     * Detect Java constant
024     */
025    public class JavaConstantTokenizer extends Tokenizer {
026    
027      public JavaConstantTokenizer(String tagBefore, String tagAfter) {
028        super(tagBefore, tagAfter);
029      }
030    
031      @Override
032      public boolean hasNextToken(CodeReader code) {
033        int lastChar = code.lastChar();
034        if (isJavaConstantStart(code.peek()) && !Character.isJavaIdentifierPart(lastChar) && !Character.isJavaIdentifierStart(lastChar)) {
035          String constant = code.peekTo(endTokenMatcher);
036          int nextCharAfterConstant = code.peek(constant.length() + 1)[constant.length()];
037          if (nextCharAfterConstant != 0 && Character.isJavaIdentifierPart(nextCharAfterConstant)) {
038            return false;
039          }
040          return true;
041        }
042        return false;
043      }
044    
045      @Override
046      public String nextToken(CodeReader code) {
047        return code.popTo(endTokenMatcher);
048      }
049    
050      private boolean isJavaConstantStart(int character) {
051        return Character.isUpperCase(character);
052      }
053    
054      private boolean isJavaConstantPart(int character) {
055        return Character.isUpperCase(character) || character == '_' || character == '-' || Character.isDigit(character);
056      }
057    
058      private EndTokenMatcher endTokenMatcher = new EndTokenMatcher() {
059    
060        public boolean match(int endFlag) {
061          return !isJavaConstantPart(endFlag);
062        }
063      };
064    
065    }