| /******************************************************************************* |
| * Copyright (c) 2008, 2010 Oracle. All rights reserved. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v1.0, which accompanies this distribution |
| * and is available at http://www.eclipse.org/legal/epl-v10.html. |
| * |
| * Contributors: |
| * Oracle - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.jpt.common.utility.internal; |
| |
| /** |
| * Straightforward definition of an object pairing. |
| * The key is immutable. |
| */ |
| public interface Association<K, V> { |
| |
| /** |
| * Return the association's key. |
| */ |
| K getKey(); |
| |
| /** |
| * Return the association's value. |
| */ |
| V getValue(); |
| |
| /** |
| * Set the association's value. |
| * Return the previous value. |
| */ |
| V setValue(V value); |
| |
| /** |
| * Return true if the associations' keys and values |
| * are equal. |
| */ |
| boolean equals(Object o); |
| |
| /** |
| * Return a hash code based on the association's |
| * key and value. |
| */ |
| int hashCode(); |
| |
| } |