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.collections4.functors;
18
19 import java.io.Serializable;
20 import java.util.Objects;
21
22 import org.apache.commons.collections4.Predicate;
23
24 /**
25 * Predicate implementation that returns true if either of the predicates return true.
26 *
27 * @param <T> the type of the input to the predicate.
28 * @since 3.0
29 */
30 public final class OrPredicate<T> extends AbstractPredicate<T> implements PredicateDecorator<T>, Serializable {
31
32 /** Serial version UID */
33 private static final long serialVersionUID = -8791518325735182855L;
34
35 /**
36 * Creates the predicate.
37 *
38 * @param <T> the type that the predicate queries
39 * @param predicate1 the first predicate to check, not null
40 * @param predicate2 the second predicate to check, not null
41 * @return the {@code and} predicate
42 * @throws NullPointerException if either predicate is null
43 */
44 public static <T> Predicate<T> orPredicate(final Predicate<? super T> predicate1,
45 final Predicate<? super T> predicate2) {
46 return new OrPredicate<>(Objects.requireNonNull(predicate1, "predicate1"),
47 Objects.requireNonNull(predicate2, "predicate2"));
48 }
49 /** The array of predicates to call */
50 private final Predicate<? super T> iPredicate1;
51
52 /** The array of predicates to call */
53 private final Predicate<? super T> iPredicate2;
54
55 /**
56 * Constructor that performs no validation.
57 * Use {@code orPredicate} if you want that.
58 *
59 * @param predicate1 the first predicate to check, not null
60 * @param predicate2 the second predicate to check, not null
61 */
62 public OrPredicate(final Predicate<? super T> predicate1, final Predicate<? super T> predicate2) {
63 iPredicate1 = predicate1;
64 iPredicate2 = predicate2;
65 }
66
67 /**
68 * Gets the two predicates being decorated as an array.
69 *
70 * @return the predicates
71 * @since 3.1
72 */
73 @Override
74 @SuppressWarnings("unchecked")
75 public Predicate<? super T>[] getPredicates() {
76 return new Predicate[] {iPredicate1, iPredicate2};
77 }
78
79 /**
80 * Evaluates the predicate returning true if either predicate returns true.
81 *
82 * @param object the input object
83 * @return true if either decorated predicate returns true
84 */
85 @Override
86 public boolean test(final T object) {
87 return iPredicate1.test(object) || iPredicate2.test(object);
88 }
89
90 }