commons-collections4-4.4-sources.jar - Apache Commons Collections

commons-collections4-4.4-sources.jar is the source JAR file for Apache Commons Collections 4.2, which provides additional collection handling functionalities on top of JDK library.

JAR File Size and Download Location:

JAR name: commons-collections4-4.4-sources.jar
Target JDK version: 8
Dependency: None
File size: 715,541 bytes
Release date: 05-Jul-2019
Download: Apache Commons Collections



 * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.apache.commons.collections4.functors;

import java.util.HashSet;
import java.util.Set;

import org.apache.commons.collections4.Predicate;

 * Predicate implementation that returns true the first time an object is
 * passed into the predicate.
 * @since 3.0
public final class UniquePredicate<T> implements Predicate<T>, Serializable {

    /** Serial version UID */
    private static final long serialVersionUID = -3319417438027438040L;

    /** The set of previously seen objects */
    private final Set<T> iSet = new HashSet<>();

     * Factory to create the predicate.
     * @param <T> the type that the predicate queries
     * @return the predicate
     * @throws IllegalArgumentException if the predicate is null
    public static <T> Predicate<T> uniquePredicate() {
        return new UniquePredicate<>();

     * Constructor that performs no validation.
     * Use <code>uniquePredicate</code> if you want that.
    public UniquePredicate() {

     * Evaluates the predicate returning true if the input object hasn't been
     * received yet.
     * @param object  the input object
     * @return true if this is the first time the object is seen
    public boolean evaluate(final T object) {
        return iSet.add(object);




Or download all of them as a single archive file:

File name: commons-collections4-4.4-sources.jar
File size: 715541 bytes
Release date: 2019-07-05


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