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.core;
18
19 import org.apache.commons.functor.BinaryPredicate;
20 import org.apache.commons.functor.Predicate;
21 import org.apache.commons.functor.adapter.RightBoundPredicate;
22
23 /**
24 * {@link #test Tests} the reference (!=) inequality of its arguments.
25 *
26 * @param <L> the left argument type.
27 * @param <R> the right argument type.
28 * @version $Revision: 1537906 $ $Date: 2013-11-01 12:47:33 +0100 (Fr, 01 Nov 2013) $
29 */
30 public final class IsNotSame<L, R> implements BinaryPredicate<L, R> {
31 // static attributes
32 // ------------------------------------------------------------------------
33 /**
34 * Basic IsNotSame<Object, Object> instance.
35 */
36 public static final IsNotSame<Object, Object> INSTANCE = IsNotSame.<Object, Object>instance();
37
38 // constructor
39 // ------------------------------------------------------------------------
40 /**
41 * Create a new IsNotSame.
42 */
43 public IsNotSame() {
44 }
45
46 // predicate interface
47 // ------------------------------------------------------------------------
48 /**
49 * {@inheritDoc}
50 */
51 public boolean test(L left, R right) {
52 return left != right;
53 }
54
55 /**
56 * {@inheritDoc}
57 */
58 @Override
59 public boolean equals(Object that) {
60 return that instanceof IsNotSame<?, ?>;
61 }
62
63 /**
64 * {@inheritDoc}
65 */
66 @Override
67 public int hashCode() {
68 return "IsNotSame".hashCode();
69 }
70
71 /**
72 * {@inheritDoc}
73 */
74 @Override
75 public String toString() {
76 return "IsNotSame";
77 }
78
79 // static methods
80 // ------------------------------------------------------------------------
81 /**
82 * Get an IsNotSame instance.
83 * @param <L> the left argument type.
84 * @param <R> the right argument type.
85 * @return IsNotSame
86 */
87 public static <L, R> IsNotSame<L, R> instance() {
88 return new IsNotSame<L, R>();
89 }
90
91 /**
92 * Get an IsNotSame Predicate.
93 * @param <L> the left argument type.
94 * @param <R> the right argument type.
95 * @param object bound comparison object
96 * @return Predicate<L>
97 */
98 public static <L, R> Predicate<L> as(R object) {
99 return new RightBoundPredicate<L>(new IsNotSame<L, R>(), object);
100 }
101 }