| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.commons.collections4.functors; |
| |
| import java.io.Serializable; |
| |
| import org.apache.commons.collections4.Predicate; |
| |
| /** |
| * Predicate implementation that always returns false. |
| * |
| * @since 3.0 |
| */ |
| public final class FalsePredicate<T> implements Predicate<T>, Serializable { |
| |
| /** Serial version UID */ |
| private static final long serialVersionUID = 7533784454832764388L; |
| |
| /** Singleton predicate instance */ |
| @SuppressWarnings("rawtypes") // the static instance works for all types |
| public static final Predicate INSTANCE = new FalsePredicate<>(); |
| |
| /** |
| * Get a typed instance. |
| * |
| * @param <T> the type that the predicate queries |
| * @return the singleton instance |
| * @since 4.0 |
| */ |
| public static <T> Predicate<T> falsePredicate() { |
| return INSTANCE; |
| } |
| |
| /** |
| * Restricted constructor. |
| */ |
| private FalsePredicate() { |
| } |
| |
| /** |
| * Evaluates the predicate returning false always. |
| * |
| * @param object the input object |
| * @return false always |
| */ |
| @Override |
| public boolean evaluate(final T object) { |
| return false; |
| } |
| |
| private Object readResolve() { |
| return INSTANCE; |
| } |
| |
| } |