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.squid.text; 021 022 public class LiteralValueHandler extends LineContextHandler { 023 024 private final char delimiter; 025 026 public LiteralValueHandler(char delimiter) { 027 this.delimiter = delimiter; 028 } 029 030 @Override 031 boolean matchToEnd(Line line, StringBuilder pendingLine) { 032 if (matchEndOfString(pendingLine, delimiter) && evenNumberOfBackSlashBeforeDelimiter(pendingLine)) { 033 return true; 034 } 035 return false; 036 } 037 038 private boolean evenNumberOfBackSlashBeforeDelimiter(StringBuilder pendingLine) { 039 int numberOfBackSlashChar = 0; 040 for (int index = pendingLine.length() - 2; index >= 0; index--) { 041 if (pendingLine.charAt(index) == '\\') { 042 numberOfBackSlashChar++; 043 } else { 044 break; 045 } 046 } 047 return numberOfBackSlashChar % 2 == 0; 048 } 049 050 @Override 051 boolean matchToBegin(Line line, StringBuilder pendingLine) { 052 if (matchEndOfString(pendingLine, delimiter)) { 053 return true; 054 } 055 return false; 056 } 057 058 @Override 059 boolean matchWithEndOfLine(Line line, StringBuilder pendingLine) { 060 throw new IllegalStateException("String should have been ended before the end of line. line = '" + pendingLine + "'"); 061 } 062 }