| Clover coverage report - PLT Utilities Test Coverage (plt-20120304-r5436) |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| IntersectionRelation.java | - | 0% | 0% | 0% |
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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.collect; | |
| 36 | ||
| 37 | import edu.rice.cs.plt.iter.IterUtil; | |
| 38 | ||
| 39 | /** | |
| 40 | * The intersection of two relations, lazily constructed and updated dynamically. This improves on | |
| 41 | * a general {@code FilteredRelation} by taking advantage of the fact that the predicate used for | |
| 42 | * filtering is also a relation. | |
| 43 | */ | |
| 44 | public class IntersectionRelation<T1, T2> extends FilteredRelation<T1, T2> { | |
| 45 | ||
| 46 | /** | |
| 47 | * For best performance of {@link #iterator}, {@link #size}, and {@link #isEmpty}, {@code set2} | |
| 48 | * should be the smaller of the two sets (this is not handled automatically because calculating | |
| 49 | * sizes may be expensive). | |
| 50 | */ | |
| 51 | 0 | public IntersectionRelation(Relation<? super T1, ? super T2> rel1, Relation<T1, T2> rel2) { |
| 52 | 0 | super(rel2, rel1); |
| 53 | } | |
| 54 | ||
| 55 | 0 | @Override public PredicateSet<T2> matchFirst(T1 first) { |
| 56 | // cast is valid but current rules don't allow it | |
| 57 | 0 | @SuppressWarnings("unchecked") |
| 58 | Relation<? super T1, ? super T2> rel1 = (Relation<? super T1, ? super T2>) _pred; | |
| 59 | 0 | return new IntersectionSet<T2>(rel1.matchFirst(first), _rel.matchFirst(first)); |
| 60 | } | |
| 61 | ||
| 62 | 0 | @Override public PredicateSet<T1> matchSecond(T2 second) { |
| 63 | // cast is valid but current rules don't allow it | |
| 64 | 0 | @SuppressWarnings("unchecked") |
| 65 | Relation<? super T1, ? super T2> rel1 = (Relation<? super T1, ? super T2>) _pred; | |
| 66 | 0 | return new IntersectionSet<T1>(rel1.matchSecond(second), _rel.matchSecond(second)); |
| 67 | } | |
| 68 | ||
| 69 | 0 | public boolean isInfinite() { |
| 70 | 0 | return ((Relation<?, ?>) _pred).isInfinite() && IterUtil.isInfinite(_rel); |
| 71 | } | |
| 72 | ||
| 73 | 0 | public boolean hasFixedSize() { |
| 74 | 0 | return ((Relation<?, ?>) _pred).hasFixedSize() && IterUtil.hasFixedSize(_rel); |
| 75 | } | |
| 76 | ||
| 77 | 0 | public boolean isStatic() { |
| 78 | 0 | return ((Relation<?, ?>) _pred).isStatic() && IterUtil.isStatic(_rel); |
| 79 | } | |
| 80 | ||
| 81 | 0 | @Override public boolean isEmpty() { |
| 82 | 0 | return ((Relation<?, ?>) _pred).isEmpty() || (_rel != _pred && super.isEmpty()); |
| 83 | } | |
| 84 | ||
| 85 | } |
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