| Clover coverage report - PLT Utilities Test Coverage (plt-20120304-r5436) |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| Tuple.java | 100% | 100% | 100% | 100% |
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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 java.io.ObjectInputStream; | |
| 39 | import java.io.IOException; | |
| 40 | ||
| 41 | /** | |
| 42 | * <p>Abstract parent of all tuple classes, providing lazy evaluation of the hash code. See the | |
| 43 | * package documentation for general discussion of the tuple classes.</p> | |
| 44 | * | |
| 45 | * <p>As a wrapper for arbitrary objects, instances of this class will serialize without error | |
| 46 | * only if the wrapped objects are serializable.</p> | |
| 47 | */ | |
| 48 | public abstract class Tuple implements Serializable { | |
| 49 | ||
| 50 | private transient int _hashCode; | |
| 51 | private transient boolean _validHashCode; | |
| 52 | ||
| 53 | 3327 | protected Tuple() { |
| 54 | 3327 | _validHashCode = false; |
| 55 | // _hashCode's value doesn't matter yet | |
| 56 | } | |
| 57 | ||
| 58 | protected abstract int generateHashCode(); | |
| 59 | ||
| 60 | 4150 | public int hashCode() { |
| 61 | 1835 | if (!_validHashCode) { _hashCode = generateHashCode(); _validHashCode = true; } |
| 62 | 4150 | return _hashCode; |
| 63 | } | |
| 64 | ||
| 65 | 60 | private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { |
| 66 | 60 | stream.defaultReadObject(); |
| 67 | 60 | _validHashCode = false; |
| 68 | // _hashCode's value doesn't matter yet | |
| 69 | } | |
| 70 | ||
| 71 | } |
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