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) -> {/* No-op */}; 30 31 /** 32 * No-op singleton. 33 */ 34 static final IORunnable IO_RUNNABLE = () -> {/* No-op */}; 35 36 /** 37 * No-op singleton. 38 */ 39 @SuppressWarnings("rawtypes") 40 static final IOBiFunction IO_BI_FUNCTION = (t, u) -> null; 41 42 /** 43 * No-op singleton. 44 */ 45 @SuppressWarnings("rawtypes") 46 static final IOFunction IO_FUNCTION_ID = t -> t; 47 48 /** 49 * Always false. 50 */ 51 static final IOPredicate<Object> IO_PREDICATE_FALSE = t -> false; 52 53 /** 54 * Always true. 55 */ 56 static final IOPredicate<Object> IO_PREDICATE_TRUE = t -> true; 57 58 /** 59 * No-op singleton. 60 */ 61 @SuppressWarnings("rawtypes") 62 static final IOTriConsumer IO_TRI_CONSUMER = (t, u, v) -> {/* No-op */}; 63 64 private Constants() { 65 // We don't want instances 66 } 67 68 }