org.magicwerk.brownies.collections.ImmutableMapEntry Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of brownies-collections Show documentation

Brownies Collections complements the Java Collections Framework. GapList combines the strengths of both ArrayList and LinkedList. BigList is a list optimized for storing large number of elements. There are specialized List implementations for all primitive data types (IntGapList, IntBigList, IntObjGapList, IntObjBigList). The key collection classes offer support for keys and constraints for lists and collections (KeyList, KeyCollection, KeySet, Key1List, Key1Collection, Key1Set, Key2List, Key2Collection, Key2Set).

There is a newer version: 0.9.16

Show newest version

/*
 * Copyright 2015 by Thomas Mauch
 *
 * Licensed 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.
 *
 * $Id: ImmutableMapEntry.java 2927 2015-09-04 13:07:01Z origo $
 */
package org.magicwerk.brownies.collections;

import java.util.Map.Entry;

/**
 * Read-only implementation of Map.Entry.
 *
 * @author Thomas Mauch
 * @version $Id: ImmutableMapEntry.java 2927 2015-09-04 13:07:01Z origo $
 */
public class ImmutableMapEntry implements Entry {
	private K key;
	private E value;

	/**
	 * Constructor of an immutable map entry.
	 * 
	 * @param key	key
	 * @param value	value
	 */
	public ImmutableMapEntry(K key, E value) {
		this.key = key;
		this.value = value;
	}

	@Override
	public K getKey() {
		return key;
	}

	@Override
	public E getValue() {
		return value;
	}

	/**
	 * {@inheritDoc}
	 * 
	 * Note that this method fails with an AssertionError because the object is read only.
	 * 
	 */
	@Override
	public E setValue(E value) {
		throw new AssertionError();
	}

	@Override
	public String toString() {
		return "MapEntry [key=" + key + ", value=" + value + "]";
	}

}