| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
| IdentitySet |
|
| 1.0;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 | } |