Coverage Report - net.sourceforge.pebble.dao.file.XmlStringFilter
 
Classes in this File Line Coverage Branch Coverage Complexity
XmlStringFilter
96%
26/27
89%
25/28
9.5
 
 1  
 /*
 2  
  * Copyright (c) 2003-2011, Simon Brown
 3  
  * All rights reserved.
 4  
  *
 5  
  * Redistribution and use in source and binary forms, with or without
 6  
  * modification, are permitted provided that the following conditions are met:
 7  
  *
 8  
  *   - Redistributions of source code must retain the above copyright
 9  
  *     notice, this list of conditions and the following disclaimer.
 10  
  *
 11  
  *   - Redistributions in binary form must reproduce the above copyright
 12  
  *     notice, this list of conditions and the following disclaimer in
 13  
  *     the documentation and/or other materials provided with the
 14  
  *     distribution.
 15  
  *
 16  
  *   - Neither the name of Pebble nor the names of its contributors may
 17  
  *     be used to endorse or promote products derived from this software
 18  
  *     without specific prior written permission.
 19  
  *
 20  
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 21  
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 22  
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 23  
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 24  
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 25  
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 26  
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 27  
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 28  
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 29  
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 30  
  * POSSIBILITY OF SUCH DAMAGE.
 31  
  */
 32  
 
 33  
 package net.sourceforge.pebble.dao.file;
 34  
 
 35  
 import java.util.BitSet;
 36  
 
 37  
 /**
 38  
  * Filters strings in XML so that they don't contain any illegal characters
 39  
  *
 40  
  * @author James Roper
 41  
  */
 42  0
 public class XmlStringFilter {
 43  
 
 44  
   private static final BitSet LEGAL_CONTROL_CHARACTERS;
 45  
 
 46  
   static {
 47  4
     LEGAL_CONTROL_CHARACTERS = new BitSet(32);
 48  4
     LEGAL_CONTROL_CHARACTERS.set('\t');
 49  4
     LEGAL_CONTROL_CHARACTERS.set('\n');
 50  4
     LEGAL_CONTROL_CHARACTERS.set('\r');
 51  4
   }
 52  
 
 53  
   private static boolean isLegal(char c) {
 54  
     // A character is legal if it's a low or high surrogate, if it's not a
 55  
     // control character, or if it's a legal control character
 56  15956
     return Character.isLowSurrogate(c) || Character.isHighSurrogate(c) ||
 57  
         c >= 32 || c < 0 || LEGAL_CONTROL_CHARACTERS.get(c);
 58  
   }
 59  
 
 60  
   public static String filter(String s) {
 61  1752
     if (s.isEmpty()) {
 62  292
       return s;
 63  
     }
 64  
 
 65  1460
     StringBuilder result = null;
 66  1460
     int start = 0;
 67  
     int pos;
 68  
 
 69  17416
     for (pos = 0; pos < s.length(); pos++) {
 70  15956
       if (!isLegal(s.charAt(pos))) {
 71  60
         if (pos > start) {
 72  28
           if (result == null) {
 73  20
             result = new StringBuilder(s.substring(start, pos));
 74  
           } else {
 75  8
             result.append(s.substring(start, pos));
 76  
           }
 77  
         }
 78  60
         start = pos + 1;
 79  
       }
 80  
     }
 81  
 
 82  1460
     if (start == 0) {
 83  1428
       return s;
 84  32
     } else if (pos > start) {
 85  8
       if (result == null) {
 86  4
         return s.substring(start, pos);
 87  
       } else {
 88  4
         result.append(s.substring(start, pos));
 89  
       }
 90  
     }
 91  28
     if (result != null) {
 92  20
       return result.toString();
 93  
     } else {
 94  8
       return "";
 95  
     }
 96  
   }
 97  
 }