001/*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2012 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 */
020package org.sonar.colorizer;
021
022import org.sonar.channel.CodeReader;
023import org.sonar.channel.EndMatcher;
024
025/**
026 * Detect Java constant
027 */
028public class JavaConstantTokenizer extends Tokenizer {
029
030  private final String tagBefore;
031  private final String tagAfter;
032  private static final int DOT = '.';
033
034  public JavaConstantTokenizer(String tagBefore, String tagAfter) {
035    this.tagBefore = tagBefore;
036    this.tagAfter = tagAfter;
037  }
038
039  private boolean hasNextToken(CodeReader code) {
040    int lastChar = code.lastChar();
041    if (isJavaConstantStart(code.peek()) && !Character.isJavaIdentifierPart(lastChar) && !Character.isJavaIdentifierStart(lastChar)
042        && lastChar != DOT) {
043      String constant = code.peekTo(endTokenMatcher);
044      int nextCharAfterConstant = code.peek(constant.length() + 1)[constant.length()];
045      if (nextCharAfterConstant != 0 && Character.isJavaIdentifierPart(nextCharAfterConstant)) {
046        return false;
047      }
048      return true;
049    }
050    return false;
051  }
052
053  @Override
054  public boolean consume(CodeReader code, HtmlCodeBuilder codeBuilder) {
055    if (hasNextToken(code)) {
056      codeBuilder.appendWithoutTransforming(tagBefore);
057      code.popTo(endTokenMatcher, codeBuilder);
058      codeBuilder.appendWithoutTransforming(tagAfter);
059      return true;
060    } else {
061      return false;
062    }
063  }
064
065  private boolean isJavaConstantStart(int character) {
066    return Character.isUpperCase(character);
067  }
068
069  private boolean isJavaConstantPart(int character) {
070    return Character.isUpperCase(character) || character == '_' || character == '-' || Character.isDigit(character);
071  }
072
073  private EndMatcher endTokenMatcher = new EndMatcher() {
074
075    public boolean match(int endFlag) {
076      return !isJavaConstantPart(endFlag);
077    }
078  };
079
080}