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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
✍: FYIcenter.com
⏎ org/apache/commons/collections4/functors/SwitchClosure.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.functors; import java.io.Serializable; import java.util.Map; import org.apache.commons.collections4.Closure; import org.apache.commons.collections4.Predicate; /** * Closure implementation calls the closure whose predicate returns true, * like a switch statement. * * @since 3.0 */ public class SwitchClosure<E> implements Closure<E>, Serializable { /** Serial version UID */ private static final long serialVersionUID = 3518477308466486130L; /** The tests to consider */ private final Predicate<? super E>[] iPredicates; /** The matching closures to call */ private final Closure<? super E>[] iClosures; /** The default closure to call if no tests match */ private final Closure<? super E> iDefault; /** * Factory method that performs validation and copies the parameter arrays. * * @param <E> the type that the closure acts on * @param predicates array of predicates, cloned, no nulls * @param closures matching array of closures, cloned, no nulls * @param defaultClosure the closure to use if no match, null means nop * @return the <code>chained</code> closure * @throws NullPointerException if array is null * @throws NullPointerException if any element in the array is null * @throws IllegalArgumentException if the array lengths of predicates and closures do not match */ @SuppressWarnings("unchecked") public static <E> Closure<E> switchClosure(final Predicate<? super E>[] predicates, final Closure<? super E>[] closures, final Closure<? super E> defaultClosure) { FunctorUtils.validate(predicates); FunctorUtils.validate(closures); if (predicates.length != closures.length) { throw new IllegalArgumentException("The predicate and closure arrays must be the same size"); } if (predicates.length == 0) { return (Closure<E>) (defaultClosure == null ? NOPClosure.<E>nopClosure(): defaultClosure); } return new SwitchClosure<>(predicates, closures, defaultClosure); } /** * Create a new Closure that calls one of the closures depending * on the predicates. * <p> * The Map consists of Predicate keys and Closure values. A closure * is called if its matching predicate returns true. Each predicate is evaluated * until one returns true. If no predicates evaluate to true, the default * closure is called. The default closure is set in the map with a * null key. The ordering is that of the iterator() method on the entryset * collection of the map. * * @param <E> the type that the closure acts on * @param predicatesAndClosures a map of predicates to closures * @return the <code>switch</code> closure * @throws NullPointerException if the map is null * @throws NullPointerException if any closure in the map is null * @throws ClassCastException if the map elements are of the wrong type */ @SuppressWarnings("unchecked") public static <E> Closure<E> switchClosure(final Map<Predicate<E>, Closure<E>> predicatesAndClosures) { if (predicatesAndClosures == null) { throw new NullPointerException("The predicate and closure map must not be null"); } // convert to array like this to guarantee iterator() ordering final Closure<? super E> defaultClosure = predicatesAndClosures.remove(null); final int size = predicatesAndClosures.size(); if (size == 0) { return (Closure<E>) (defaultClosure == null ? NOPClosure.<E>nopClosure() : defaultClosure); } final Closure<E>[] closures = new Closure[size]; final Predicate<E>[] preds = new Predicate[size]; int i = 0; for (final Map.Entry<Predicate<E>, Closure<E>> entry : predicatesAndClosures.entrySet()) { preds[i] = entry.getKey(); closures[i] = entry.getValue(); i++; } return new SwitchClosure<>(false, preds, closures, defaultClosure); } /** * Hidden constructor for the use by the static factory methods. * * @param clone if {@code true} the input arguments will be cloned * @param predicates array of predicates, no nulls * @param closures matching array of closures, no nulls * @param defaultClosure the closure to use if no match, null means nop */ @SuppressWarnings("unchecked") private SwitchClosure(final boolean clone, final Predicate<? super E>[] predicates, final Closure<? super E>[] closures, final Closure<? super E> defaultClosure) { super(); iPredicates = clone ? FunctorUtils.copy(predicates) : predicates; iClosures = clone ? FunctorUtils.copy(closures) : closures; iDefault = (Closure<? super E>) (defaultClosure == null ? NOPClosure.<E>nopClosure() : defaultClosure); } /** * Constructor that performs no validation. * Use <code>switchClosure</code> if you want that. * * @param predicates array of predicates, cloned, no nulls * @param closures matching array of closures, cloned, no nulls * @param defaultClosure the closure to use if no match, null means nop */ public SwitchClosure(final Predicate<? super E>[] predicates, final Closure<? super E>[] closures, final Closure<? super E> defaultClosure) { this(true, predicates, closures, defaultClosure); } /** * Executes the closure whose matching predicate returns true * * @param input the input object */ @Override public void execute(final E input) { for (int i = 0; i < iPredicates.length; i++) { if (iPredicates[i].evaluate(input) == true) { iClosures[i].execute(input); return; } } iDefault.execute(input); } /** * Gets the predicates. * * @return a copy of the predicates * @since 3.1 */ public Predicate<? super E>[] getPredicates() { return FunctorUtils.<E>copy(iPredicates); } /** * Gets the closures. * * @return a copy of the closures * @since 3.1 */ public Closure<? super E>[] getClosures() { return FunctorUtils.<E>copy(iClosures); } /** * Gets the default closure. * * @return the default closure * @since 3.1 */ public Closure<? super E> getDefaultClosure() { return iDefault; } }
⏎ org/apache/commons/collections4/functors/SwitchClosure.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, 113173👍, 0💬
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