/*
 * 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
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package org.apache.commons.collections4.functors;

import java.io.Serializable;

import org.apache.commons.collections4.Predicate;

Predicate implementation that always returns true.
Since:3.0
/** * Predicate implementation that always returns true. * * @since 3.0 */
public final class TruePredicate<T> implements Predicate<T>, Serializable {
Serial version UID
/** Serial version UID */
private static final long serialVersionUID = 3374767158756189740L;
Singleton predicate instance
/** Singleton predicate instance */
@SuppressWarnings("rawtypes") public static final Predicate INSTANCE = new TruePredicate<>();
Factory returning the singleton instance.
Type parameters:
  • <T> – the type that the predicate queries
Returns:the singleton instance
Since:3.1
/** * Factory returning the singleton instance. * * @param <T> the type that the predicate queries * @return the singleton instance * @since 3.1 */
public static <T> Predicate<T> truePredicate() { return INSTANCE; }
Restricted constructor.
/** * Restricted constructor. */
private TruePredicate() { super(); }
Evaluates the predicate returning true always.
Params:
  • object – the input object
Returns:true always
/** * Evaluates the predicate returning true always. * * @param object the input object * @return true always */
@Override public boolean evaluate(final T object) { return true; } private Object readResolve() { return INSTANCE; } }