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    
021    package org.sonar.squid.text;
022    
023    public 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    }