Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
WhileGenerate |
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| 3.0;3 | ||||
WhileGenerate$1 |
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| 3.0;3 |
1 | /* | |
2 | * Licensed to the Apache Software Foundation (ASF) under one or more | |
3 | * contributor license agreements. See the NOTICE file distributed with | |
4 | * this work for additional information regarding copyright ownership. | |
5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | |
6 | * (the "License"); you may not use this file except in compliance with | |
7 | * the License. You may obtain a copy of the License at | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
11 | * Unless required by applicable law or agreed to in writing, software | |
12 | * distributed under the License is distributed on an "AS IS" BASIS, | |
13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 | * See the License for the specific language governing permissions and | |
15 | * limitations under the License. | |
16 | */ | |
17 | package org.apache.commons.functor.generator; | |
18 | ||
19 | import org.apache.commons.functor.UnaryPredicate; | |
20 | import org.apache.commons.functor.UnaryProcedure; | |
21 | ||
22 | /** | |
23 | * Wrap another {@link Generator} such that {@link #run(UnaryProcedure)} continues | |
24 | * as long as a condition is true (test before). | |
25 | * | |
26 | * @version $Revision: 1156802 $ $Date: 2011-08-11 22:13:34 +0200 (Thu, 11 Aug 2011) $ | |
27 | */ | |
28 | 8 | public class WhileGenerate<E> extends BaseGenerator<E> { |
29 | private final UnaryPredicate<? super E> test; | |
30 | ||
31 | /** | |
32 | * Create a new WhileGenerate. | |
33 | * @param test {@link UnaryPredicate} | |
34 | * @param wrapped {@link Generator} | |
35 | */ | |
36 | public WhileGenerate(UnaryPredicate<? super E> test, Generator<? extends E> wrapped) { | |
37 | 2 | super(wrapped); |
38 | 2 | if (wrapped == null) { |
39 | 0 | throw new IllegalArgumentException("Generator argument was null"); |
40 | } | |
41 | 2 | if (test == null) { |
42 | 0 | throw new IllegalArgumentException("UnaryPredicate argument was null"); |
43 | } | |
44 | 2 | this.test = test; |
45 | 2 | } |
46 | ||
47 | /** | |
48 | * {@inheritDoc} | |
49 | */ | |
50 | public void run(final UnaryProcedure<? super E> proc) { | |
51 | 2 | getWrappedGenerator().run(new UnaryProcedure<E>() { |
52 | public void run(E obj) { | |
53 | 8 | if (!test.test(obj)) { |
54 | 2 | getWrappedGenerator().stop(); |
55 | } else { | |
56 | 6 | proc.run(obj); |
57 | } | |
58 | 8 | } |
59 | }); | |
60 | 2 | } |
61 | ||
62 | /** | |
63 | * {@inheritDoc} | |
64 | */ | |
65 | @SuppressWarnings("unchecked") | |
66 | @Override | |
67 | protected Generator<? extends E> getWrappedGenerator() { | |
68 | 4 | return (Generator<? extends E>) super.getWrappedGenerator(); |
69 | } | |
70 | ||
71 | /** | |
72 | * {@inheritDoc} | |
73 | */ | |
74 | public boolean equals(Object obj) { | |
75 | 0 | if (obj == this) { |
76 | 0 | return true; |
77 | } | |
78 | 0 | if (!(obj instanceof WhileGenerate<?>)) { |
79 | 0 | return false; |
80 | } | |
81 | 0 | WhileGenerate<?> other = (WhileGenerate<?>) obj; |
82 | 0 | return other.getWrappedGenerator().equals(getWrappedGenerator()) && other.test.equals(test); |
83 | } | |
84 | ||
85 | /** | |
86 | * {@inheritDoc} | |
87 | */ | |
88 | public int hashCode() { | |
89 | 0 | int result = "WhileGenerate".hashCode(); |
90 | 0 | result <<= 2; |
91 | 0 | Generator<?> gen = getWrappedGenerator(); |
92 | 0 | result ^= gen == null ? 0 : gen.hashCode(); |
93 | 0 | result <<= 2; |
94 | 0 | result ^= test == null ? 0 : test.hashCode(); |
95 | 0 | return result; |
96 | } | |
97 | } |