| /******************************************************************************* |
| * 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.utility.internal; |
| |
| /** |
| * Implement some of the methods in {@link Association} that can |
| * be defined in terms of the other methods. |
| */ |
| public abstract class AbstractAssociation<K, V> |
| implements Association<K, V> |
| { |
| |
| /** |
| * Default constructor. |
| */ |
| protected AbstractAssociation() { |
| super(); |
| } |
| |
| @Override |
| public synchronized boolean equals(Object o) { |
| if ( ! (o instanceof Association<?, ?>)) { |
| return false; |
| } |
| Association<?, ?> other = (Association<?, ?>) o; |
| return (this.key() == null ? |
| other.key() == null : this.key().equals(other.key())) |
| && (this.value() == null ? |
| other.value() == null : this.value().equals(other.value())); |
| } |
| |
| @Override |
| public synchronized int hashCode() { |
| return (this.key() == null ? 0 : this.key().hashCode()) |
| ^ (this.value() == null ? 0 : this.value().hashCode()); |
| } |
| |
| @Override |
| public synchronized String toString() { |
| return this.key() + " => " + this.value(); //$NON-NLS-1$ |
| } |
| |
| } |