001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.commons.lang3.function; 019 020import java.util.function.Consumer; 021import java.util.function.Function; 022 023/** 024 * Provides {@link Consumer} instances. 025 * 026 * @since 3.13.0 027 */ 028public class Consumers { 029 030 /** NOP singleton. */ 031 @SuppressWarnings("rawtypes") 032 private static final Consumer NOP = Function.identity()::apply; 033 034 /** 035 * Gets the NOP Consumer singleton. 036 * 037 * @param <T> type type to consume. 038 * @return the NOP Consumer singleton.. 039 */ 040 @SuppressWarnings("unchecked") 041 public static <T> Consumer<T> nop() { 042 return NOP; 043 } 044 045 private Consumers() { 046 // No instances. 047 } 048 049}