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.lang3.function;
19
20 import java.util.function.Consumer;
21 import java.util.function.Function;
22
23 /**
24 * Provides {@link Consumer} instances.
25 *
26 * @since 3.13.0
27 */
28 public class Consumers {
29
30 /** NOP singleton. */
31 @SuppressWarnings("rawtypes")
32 private static final Consumer NOP = Function.identity()::apply;
33
34 /**
35 * Gets the NOP Consumer singleton.
36 *
37 * @param <T> type type to consume.
38 * @return the NOP Consumer singleton..
39 */
40 @SuppressWarnings("unchecked")
41 public static <T> Consumer<T> nop() {
42 return NOP;
43 }
44
45 private Consumers() {
46 // No instances.
47 }
48
49 }