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 */
020
021package org.sonar.squid.text;
022
023public class LiteralValueHandler extends LineContextHandler {
024
025  private final char delimiter;
026
027  public LiteralValueHandler(char delimiter) {
028    this.delimiter = delimiter;
029  }
030
031  @Override
032  boolean matchToEnd(Line line, StringBuilder pendingLine) {
033    return matchEndOfString(pendingLine, delimiter) && evenNumberOfBackSlashBeforeDelimiter(pendingLine);
034  }
035
036  private boolean evenNumberOfBackSlashBeforeDelimiter(StringBuilder pendingLine) {
037    int numberOfBackSlashChar = 0;
038    for (int index = pendingLine.length() - 2; index >= 0; index--) {
039      if (pendingLine.charAt(index) == '\\') {
040        numberOfBackSlashChar++;
041      } else {
042        break;
043      }
044    }
045    return numberOfBackSlashChar % 2 == 0;
046  }
047
048  @Override
049  boolean matchToBegin(Line line, StringBuilder pendingLine) {
050    if (matchEndOfString(pendingLine, delimiter)) {
051      return true;
052    }
053    return false;
054  }
055
056  @Override
057  boolean matchWithEndOfLine(Line line, StringBuilder pendingLine) {
058    return true; //see http://jira.codehaus.org/browse/SONAR-1555
059  }
060}