Coverage Report - org.jaxen.expr.IdentitySet
 
Classes in this File Line Coverage Branch Coverage Complexity
IdentitySet
100%
8/8
N/A
1
IdentitySet$IdentityWrapper
100%
6/6
100%
1/1
1
 
 1  
 /*
 2  
  $Id$
 3  
 
 4  
  Copyright 2005 Elliotte Rusty Harold. 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 are
 8  
 met:
 9  
 
 10  
   * Redistributions of source code must retain the above copyright
 11  
     notice, 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 the name of the Jaxen Project nor the names of its
 18  
     contributors may be used to endorse or promote products derived 
 19  
     from this software without specific prior written permission.
 20  
 
 21  
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 22  
 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 23  
 TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 24  
 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 25  
 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 26  
 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 27  
 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 28  
 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 29  
 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 30  
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 31  
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 32  
 
 33  
  */
 34  
 package org.jaxen.expr;
 35  
 
 36  
 import java.util.HashSet;
 37  
 
 38  
 
 39  
 /**
 40  
  * <p>
 41  
  *  This is a set that uses identity rather than equality semantics.
 42  
  * </p>
 43  
  * 
 44  
  * @author Elliotte Rusty Harold
 45  
  *
 46  
  */
 47  
 final class IdentitySet {
 48  
 
 49  1542
     private HashSet contents = new HashSet();
 50  
     
 51  
     IdentitySet() {
 52  1542
         super();
 53  1542
     }
 54  
 
 55  
     void add(Object object) {
 56  40960
         IdentityWrapper wrapper = new IdentityWrapper(object);
 57  40960
         contents.add(wrapper);
 58  40960
     }
 59  
 
 60  
     public boolean contains(Object object) {
 61  42690
         IdentityWrapper wrapper = new IdentityWrapper(object);
 62  42690
         return contents.contains(wrapper);
 63  
     }
 64  
     
 65  
     private static class IdentityWrapper {
 66  
 
 67  
         private Object object;
 68  
         
 69  83650
         IdentityWrapper(Object object) {
 70  83650
             this.object = object;
 71  83650
         }
 72  
         
 73  
         public boolean equals(Object o) {
 74  34
             IdentityWrapper w = (IdentityWrapper) o;
 75  34
             return object == w.object;
 76  
         }
 77  
 
 78  
         public int hashCode() {
 79  83650
             return System.identityHashCode(object);
 80  
         }
 81  
 
 82  
     }
 83  
 
 84  
 
 85  
 }