Coverage Report - org.jaxen.expr.IdentitySet

Classes in this File Line Coverage Branch Coverage Complexity
IdentitySet
100% 
100% 
1

 1  
 /*
 2  
  $Id$
 3  
 
 4  
  Copyright 2005 Elliotte Rusty Harold. All Rights Reserved.
 5  
  
 6  
  Redistribution and use of this software and associated documentation
 7  
  ("Software"), with or without modification, are permitted provided
 8  
  that the following conditions are met:
 9  
 
 10  
  1. Redistributions of source code must retain copyright
 11  
     statements and notices.  Redistributions must also contain a
 12  
     copy of this document.
 13  
  
 14  
  2. Redistributions in binary form must reproduce the
 15  
     above copyright notice, this list of conditions and the
 16  
     following disclaimer in the documentation and/or other
 17  
     materials provided with the distribution.
 18  
  
 19  
  3. The name "jaxen" must not be used to endorse or promote
 20  
     products derived from this Software without prior written
 21  
     permission of The Werken Company.  For written permission,
 22  
     please contact bob@werken.com.
 23  
  
 24  
  4. Products derived from this Software may not be called "jaxen"
 25  
     nor may "jaxen" appear in their names without prior written
 26  
     permission of The Werken Company. "jaxen" is a registered
 27  
     trademark of The Werken Company.
 28  
  
 29  
  5. Due credit should be given to The Werken Company.
 30  
     (http://jaxen.werken.com/).
 31  
  
 32  
  THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS
 33  
  ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 34  
  NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 35  
  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 36  
  THE WERKEN COMPANY OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 37  
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 38  
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 39  
  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 40  
  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 41  
  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 42  
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 43  
  OF THE POSSIBILITY OF SUCH DAMAGE.
 44  
 
 45  
  */
 46  
 package org.jaxen.expr;
 47  
 
 48  
 import java.util.HashSet;
 49  
 
 50  
 
 51  
 /**
 52  
  * <p>
 53  
  *  This is a set that uses identity rather than equality semantics.
 54  
  * </p>
 55  
  * 
 56  
  * @author Elliotte Rusty Harold
 57  
  *
 58  
  */
 59  
 final class IdentitySet {
 60  
 
 61  4452
     private HashSet contents = new HashSet();
 62  
     
 63  
     IdentitySet() {
 64  4452
         super();
 65  4452
     }
 66  
 
 67  
     void add(Object object) {
 68  134136
         IdentityWrapper wrapper = new IdentityWrapper(object);
 69  134136
         contents.add(wrapper);
 70  134136
     }
 71  
 
 72  
     public boolean contains(Object object) {
 73  139308
         IdentityWrapper wrapper = new IdentityWrapper(object);
 74  139308
         return contents.contains(wrapper);
 75  
     }
 76  
     
 77  
     private static class IdentityWrapper {
 78  
 
 79  
         private Object object;
 80  
         
 81  273444
         IdentityWrapper(Object object) {
 82  273444
             this.object = object;
 83  273444
         }
 84  
         
 85  
         public boolean equals(Object o) {
 86  84
             IdentityWrapper w = (IdentityWrapper) o;
 87  84
             return object == w.object;
 88  
         }
 89  
 
 90  
         public int hashCode() {
 91  273444
             return System.identityHashCode(object);
 92  
         }
 93  
 
 94  
     }
 95  
 
 96  
 
 97  
 }