| Clover coverage report - PLT Utilities Test Coverage (plt-20130623-r5436) |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| IdentityWrapper.java | 50% | 81.8% | 100% | 81.8% |
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| 1 | /*BEGIN_COPYRIGHT_BLOCK* | |
| 2 | ||
| 3 | PLT Utilities BSD License | |
| 4 | ||
| 5 | Copyright (c) 2007-2010 JavaPLT group at Rice University | |
| 6 | All rights reserved. | |
| 7 | ||
| 8 | Developed by: Java Programming Languages Team | |
| 9 | Rice University | |
| 10 | http://www.cs.rice.edu/~javaplt/ | |
| 11 | ||
| 12 | Redistribution and use in source and binary forms, with or without modification, are permitted | |
| 13 | provided that the following conditions are met: | |
| 14 | ||
| 15 | - Redistributions of source code must retain the above copyright notice, this list of conditions | |
| 16 | and the following disclaimer. | |
| 17 | - Redistributions in binary form must reproduce the above copyright notice, this list of | |
| 18 | conditions and the following disclaimer in the documentation and/or other materials provided | |
| 19 | with the distribution. | |
| 20 | - Neither the name of the JavaPLT group, Rice University, nor the names of the library's | |
| 21 | contributors may be used to endorse or promote products derived from this software without | |
| 22 | specific prior written permission. | |
| 23 | ||
| 24 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR | |
| 25 | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 26 | FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND | |
| 27 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 28 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 29 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
| 30 | IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
| 31 | OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 | ||
| 33 | *END_COPYRIGHT_BLOCK*/ | |
| 34 | ||
| 35 | package edu.rice.cs.plt.tuple; | |
| 36 | ||
| 37 | import java.io.Serializable; | |
| 38 | import edu.rice.cs.plt.lambda.Lambda; | |
| 39 | ||
| 40 | /** | |
| 41 | * A wrapper that defines {@link #equals} and {@link #hashCode} in terms of its value's | |
| 42 | * identity ({@code ==}) instead of equality (@code equals}) | |
| 43 | */ | |
| 44 | public class IdentityWrapper<T> extends Wrapper<T> { | |
| 45 | ||
| 46 | 560 | public IdentityWrapper(T value) { super(value); } |
| 47 | ||
| 48 | /** | |
| 49 | * @return {@code true} iff {@code this} is of the same class as {@code o}, and the | |
| 50 | * wrapped values are identical (according to {@code ==}) | |
| 51 | */ | |
| 52 | 917 | public boolean equals(Object o) { |
| 53 | 0 | if (this == o) { return true; } |
| 54 | 0 | else if (o == null || !getClass().equals(o.getClass())) { return false; } |
| 55 | else { | |
| 56 | 917 | Wrapper<?> cast = (Wrapper<?>) o; |
| 57 | 917 | return _value == cast._value; |
| 58 | } | |
| 59 | } | |
| 60 | ||
| 61 | 558 | protected int generateHashCode() { |
| 62 | 558 | return System.identityHashCode(_value) ^ getClass().hashCode(); |
| 63 | } | |
| 64 | ||
| 65 | /** Call the constructor (allows {@code T} to be inferred) */ | |
| 66 | 11 | public static <T> IdentityWrapper<T> make(T value) { return new IdentityWrapper<T>(value); } |
| 67 | ||
| 68 | /** Produce a lambda that invokes the constructor */ | |
| 69 | 182 | @SuppressWarnings("unchecked") public static <T> Lambda<T, Wrapper<T>> factory() { |
| 70 | 182 | return (Factory<T>) Factory.INSTANCE; |
| 71 | } | |
| 72 | ||
| 73 | private static final class Factory<T> implements Lambda<T, Wrapper<T>>, Serializable { | |
| 74 | public static final Factory<Object> INSTANCE = new Factory<Object>(); | |
| 75 | 9 | private Factory() {} |
| 76 | 547 | public Wrapper<T> value(T val) { return new IdentityWrapper<T>(val); } |
| 77 | } | |
| 78 | ||
| 79 | } |
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