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commons-collections4-4.2-sources.jar - Apache Commons Collections
commons-collections4-4.2-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-collections4-4.2-sources.jar Target JDK version: 1.7 Dependency: None File size: 708,599 bytes Release date: 08-Jul-2018 Download: Apache Commons Collections
✍: FYIcenter.com
⏎ org/apache/commons/collections4/map/UnmodifiableEntrySet.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.map; import java.lang.reflect.Array; import java.util.Collection; import java.util.Iterator; import java.util.Map; import java.util.Set; import org.apache.commons.collections4.Unmodifiable; import org.apache.commons.collections4.iterators.AbstractIteratorDecorator; import org.apache.commons.collections4.keyvalue.AbstractMapEntryDecorator; import org.apache.commons.collections4.set.AbstractSetDecorator; /** * Decorates a map entry <code>Set</code> to ensure it can't be altered. * <p> * Attempts to modify it will result in an UnsupportedOperationException. * * @param <K> the type of the keys in the map * @param <V> the type of the values in the map * * @since 3.0 */ public final class UnmodifiableEntrySet<K, V> extends AbstractSetDecorator<Map.Entry<K, V>> implements Unmodifiable { /** Serialization version */ private static final long serialVersionUID = 1678353579659253473L; /** * Factory method to create an unmodifiable set of Map Entry objects. * * @param <K> the key type * @param <V> the value type * @param set the set to decorate, must not be null * @return a new unmodifiable entry set * @throws NullPointerException if set is null * @since 4.0 */ public static <K, V> Set<Map.Entry<K, V>> unmodifiableEntrySet(final Set<Map.Entry<K, V>> set) { if (set instanceof Unmodifiable) { return set; } return new UnmodifiableEntrySet<>(set); } //----------------------------------------------------------------------- /** * Constructor that wraps (not copies). * * @param set the set to decorate, must not be null * @throws NullPointerException if set is null */ private UnmodifiableEntrySet(final Set<Map.Entry<K, V>> set) { super(set); } //----------------------------------------------------------------------- @Override public boolean add(final Map.Entry<K, V> object) { throw new UnsupportedOperationException(); } @Override public boolean addAll(final Collection<? extends Map.Entry<K, V>> coll) { throw new UnsupportedOperationException(); } @Override public void clear() { throw new UnsupportedOperationException(); } @Override public boolean remove(final Object object) { throw new UnsupportedOperationException(); } @Override public boolean removeAll(final Collection<?> coll) { throw new UnsupportedOperationException(); } @Override public boolean retainAll(final Collection<?> coll) { throw new UnsupportedOperationException(); } //----------------------------------------------------------------------- @Override public Iterator<Map.Entry<K, V>> iterator() { return new UnmodifiableEntrySetIterator(decorated().iterator()); } @Override @SuppressWarnings("unchecked") public Object[] toArray() { final Object[] array = decorated().toArray(); for (int i = 0; i < array.length; i++) { array[i] = new UnmodifiableEntry((Map.Entry<K, V>) array[i]); } return array; } @Override @SuppressWarnings("unchecked") public <T> T[] toArray(final T[] array) { Object[] result = array; if (array.length > 0) { // we must create a new array to handle multi-threaded situations // where another thread could access data before we decorate it result = (Object[]) Array.newInstance(array.getClass().getComponentType(), 0); } result = decorated().toArray(result); for (int i = 0; i < result.length; i++) { result[i] = new UnmodifiableEntry((Map.Entry<K, V>) result[i]); } // check to see if result should be returned straight if (result.length > array.length) { return (T[]) result; } // copy back into input array to fulfill the method contract System.arraycopy(result, 0, array, 0, result.length); if (array.length > result.length) { array[result.length] = null; } return array; } //----------------------------------------------------------------------- /** * Implementation of an entry set iterator. */ private class UnmodifiableEntrySetIterator extends AbstractIteratorDecorator<Map.Entry<K, V>> { protected UnmodifiableEntrySetIterator(final Iterator<Map.Entry<K, V>> iterator) { super(iterator); } @Override public Map.Entry<K, V> next() { return new UnmodifiableEntry(getIterator().next()); } @Override public void remove() { throw new UnsupportedOperationException(); } } //----------------------------------------------------------------------- /** * Implementation of a map entry that is unmodifiable. */ private class UnmodifiableEntry extends AbstractMapEntryDecorator<K, V> { protected UnmodifiableEntry(final Map.Entry<K, V> entry) { super(entry); } @Override public V setValue(final V obj) { throw new UnsupportedOperationException(); } } }
⏎ org/apache/commons/collections4/map/UnmodifiableEntrySet.java
Or download all of them as a single archive file:
File name: commons-collections4-4.2-sources.jar File size: 708599 bytes Release date: 2018-07-08 Download
⇒ Download and Install commons-collections4-4.1-bin.zip
⇐ What Is commons-collections4-4.2.jar
2023-03-28, 5974👍, 0💬
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