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
18 package org.apache.commons.io.function;
19
20 /**
21 * Defines package-private constants.
22 */
23 final class Constants {
24
25 /**
26 * No-op singleton.
27 */
28 @SuppressWarnings("rawtypes")
29 static final IOBiConsumer IO_BI_CONSUMER = (t, u) -> {
30 // noop
31 };
32
33 /**
34 * No-op singleton.
35 */
36 static final IORunnable IO_RUNNABLE = () -> {
37 // noop
38 };
39
40 /**
41 * No-op singleton.
42 */
43 @SuppressWarnings("rawtypes")
44 static final IOBiFunction IO_BI_FUNCTION = (t, u) -> null;
45
46 /**
47 * No-op singleton.
48 */
49 @SuppressWarnings("rawtypes")
50 static final IOFunction IO_FUNCTION_ID = t -> t;
51
52 /**
53 * Always false.
54 */
55 static final IOPredicate<Object> IO_PREDICATE_FALSE = t -> false;
56
57 /**
58 * Always true.
59 */
60 static final IOPredicate<Object> IO_PREDICATE_TRUE = t -> true;
61
62 /**
63 * No-op singleton.
64 */
65 @SuppressWarnings("rawtypes")
66 static final IOTriConsumer IO_TRI_CONSUMER = (t, u, v) -> {
67 // noop
68 };
69
70 private Constants() {
71 // We don't want instances
72 }
73
74 }