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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
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⏎ org/apache/commons/collections4/QueueUtils.java
/* * 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; import java.util.LinkedList; import java.util.Queue; import org.apache.commons.collections4.queue.PredicatedQueue; import org.apache.commons.collections4.queue.SynchronizedQueue; import org.apache.commons.collections4.queue.TransformedQueue; import org.apache.commons.collections4.queue.UnmodifiableQueue; /** * Provides utility methods and decorators for {@link Queue} instances. * * @since 4.0 */ public class QueueUtils { /** * An empty unmodifiable queue. */ @SuppressWarnings("rawtypes") // OK, empty queue is compatible with any type public static final Queue EMPTY_QUEUE = UnmodifiableQueue.unmodifiableQueue(new LinkedList<>()); /** * <code>QueueUtils</code> should not normally be instantiated. */ private QueueUtils() {} //----------------------------------------------------------------------- /** * Returns a synchronized (thread-safe) queue backed by the given queue. * In order to guarantee serial access, it is critical that all access to the * backing queue is accomplished through the returned queue. * <p> * It is imperative that the user manually synchronize on the returned queue * when iterating over it: * * <pre> * Queue queue = QueueUtils.synchronizedQueue(new CircularFifoQueue()); * ... * synchronized(queue) { * Iterator i = queue.iterator(); // Must be in synchronized block * while (i.hasNext()) * foo(i.next()); * } * } * </pre> * * Failure to follow this advice may result in non-deterministic behavior. * * @param <E> the element type * @param queue the queue to synchronize, must not be null * @return a synchronized queue backed by that queue * @throws NullPointerException if the queue is null * @since 4.2 */ public static <E> Queue<E> synchronizedQueue(final Queue<E> queue) { return SynchronizedQueue.synchronizedQueue(queue); } /** * Returns an unmodifiable queue backed by the given queue. * * @param <E> the type of the elements in the queue * @param queue the queue to make unmodifiable, must not be null * @return an unmodifiable queue backed by that queue * @throws NullPointerException if the queue is null */ public static <E> Queue<E> unmodifiableQueue(final Queue<? extends E> queue) { return UnmodifiableQueue.unmodifiableQueue(queue); } /** * Returns a predicated (validating) queue backed by the given queue. * <p> * Only objects that pass the test in the given predicate can be added to the queue. * Trying to add an invalid object results in an IllegalArgumentException. * It is important not to use the original queue after invoking this method, * as it is a backdoor for adding invalid objects. * * @param <E> the type of the elements in the queue * @param queue the queue to predicate, must not be null * @param predicate the predicate used to evaluate new elements, must not be null * @return a predicated queue * @throws NullPointerException if the queue or predicate is null */ public static <E> Queue<E> predicatedQueue(final Queue<E> queue, final Predicate<? super E> predicate) { return PredicatedQueue.predicatedQueue(queue, predicate); } /** * Returns a transformed queue backed by the given queue. * <p> * Each object is passed through the transformer as it is added to the * Queue. It is important not to use the original queue after invoking this * method, as it is a backdoor for adding untransformed objects. * <p> * Existing entries in the specified queue will not be transformed. * If you want that behaviour, see {@link TransformedQueue#transformedQueue}. * * @param <E> the type of the elements in the queue * @param queue the queue to predicate, must not be null * @param transformer the transformer for the queue, must not be null * @return a transformed queue backed by the given queue * @throws NullPointerException if the queue or transformer is null */ public static <E> Queue<E> transformingQueue(final Queue<E> queue, final Transformer<? super E, ? extends E> transformer) { return TransformedQueue.transformingQueue(queue, transformer); } /** * Get an empty <code>Queue</code>. * * @param <E> the type of the elements in the queue * @return an empty {@link Queue} */ @SuppressWarnings("unchecked") // OK, empty queue is compatible with any type public static <E> Queue<E> emptyQueue() { return EMPTY_QUEUE; } }
⏎ org/apache/commons/collections4/QueueUtils.java
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 Download
⇒ Download and Install commons-collections4-4.2-bin.zip
⇐ What Is commons-collections4-4.4.jar
2020-12-15, 107350👍, 0💬
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