Coverage Report - net.sf.jmatchparser.util.RegexQuoter
 
Classes in this File Line Coverage Branch Coverage Complexity
RegexQuoter
80%
12/15
83%
5/6
2,333
 
 1  
 /*
 2  
  * Copyright (c) 2006 - 2011 Michael Schierl
 3  
  * 
 4  
  * All rights reserved.
 5  
  * 
 6  
  * Redistribution and use in source and binary forms, with or without
 7  
  * modification, are permitted provided that the following conditions
 8  
  * are met:
 9  
  * 
 10  
  * - Redistributions of source code must retain the above copyright notice,
 11  
  *   this list of conditions and the following disclaimer.
 12  
  *   
 13  
  * - Redistributions in binary form must reproduce the above copyright
 14  
  *   notice, this list of conditions and the following disclaimer in the
 15  
  *   documentation and/or other materials provided with the distribution.
 16  
  *   
 17  
  * - Neither name of the copyright holders nor the names of its
 18  
  *   contributors may be used to endorse or promote products derived from
 19  
  *   this software without specific prior written permission.
 20  
  *   
 21  
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND THE CONTRIBUTORS
 22  
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 23  
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 24  
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 25  
  * HOLDERS OR THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 26  
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 27  
  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 28  
  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 29  
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 30  
  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 31  
  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 32  
  */
 33  
 package net.sf.jmatchparser.util;
 34  
 
 35  
 import java.util.regex.Pattern;
 36  
 
 37  
 /**
 38  
  * Utility class for quoting regular expressions for matching literal text.
 39  
  * 
 40  
  * This class was very useful in Java 1.4, where {@link Pattern#quote(String)}
 41  
  * did not exist yet. Nowadays, only its {@link #quotePartially(String)}
 42  
  * function is useful.
 43  
  */
 44  0
 public class RegexQuoter {
 45  
 
 46  
         /**
 47  
          * Quote an expression.
 48  
          * 
 49  
          * @param expression
 50  
          *            any text
 51  
          * @return a regular expression that matches exactly the input text
 52  
          * @deprecated as of Java 1.5, use {@link Pattern#quote(String)} instead
 53  
          */
 54  
         @Deprecated
 55  
         public static String quote(String expression) {
 56  0
                 return Pattern.quote(expression);
 57  
         }
 58  
 
 59  
         /**
 60  
          * Quote an expression partially. Parts between « and » are not
 61  
          * quoted, but left inside the expression.
 62  
          */
 63  
         public static String quotePartially(String expression) {
 64  2
                 return quotePartially(expression, "«", "»");
 65  
         }
 66  
 
 67  
         /**
 68  
          * Quote an expression partially. Parts between <i>startDelimiter</i> and
 69  
          * <i>endDelimiter</i> are not quoted, but left inside the expression.
 70  
          */
 71  
         public static String quotePartially(String expression, String startDelimiter, String endDelimiter) {
 72  2
                 StringBuilder sb = new StringBuilder();
 73  
                 int pos;
 74  6
                 while ((pos = expression.indexOf(startDelimiter)) != -1) {
 75  4
                         sb.append(Pattern.quote(expression.substring(0, pos))).append("(");
 76  4
                         expression = expression.substring(pos + startDelimiter.length());
 77  4
                         pos = expression.indexOf(endDelimiter);
 78  4
                         if (pos == -1)
 79  0
                                 throw new RuntimeException("Missing delimiter");
 80  4
                         if (pos == 0)
 81  1
                                 sb.append(".*?");
 82  4
                         sb.append(expression.substring(0, pos)).append(")");
 83  4
                         expression = expression.substring(pos + endDelimiter.length());
 84  
                 }
 85  2
                 return sb.append(Pattern.quote(expression)).toString();
 86  
         }
 87  
 }