/* * Copyright (C) 2017 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.deskclock; /** * A Predicate can determine a true or false value for any input of its * parameterized type. For example, a {@code RegexPredicate} might implement * {@code Predicate}, and return true for any String that matches its * given regular expression. *

*

* Implementors of Predicate which may cause side effects upon evaluation are * strongly encouraged to state this fact clearly in their API documentation. */ public interface Predicate { boolean apply(T t); /** * An implementation of the predicate interface that always returns true. */ Predicate TRUE = new Predicate() { @Override public boolean apply(Object o) { return true; } }; /** * An implementation of the predicate interface that always returns false. */ Predicate FALSE = new Predicate() { @Override public boolean apply(Object o) { return false; } }; }