| /******************************************************************************* |
| * Copyright (c) 2006 IBM Corporation and others. |
| * 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: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.jface.internal.databinding.provisional.observable.value; |
| |
| import org.eclipse.jface.internal.databinding.provisional.observable.Diffs; |
| import org.eclipse.jface.internal.databinding.provisional.observable.IDiff; |
| |
| /** |
| * @since 1.0 |
| * |
| */ |
| public abstract class ValueDiff implements IDiff { |
| |
| /** |
| * Creates a value diff. |
| */ |
| public ValueDiff() { |
| } |
| |
| /** |
| * @return the old value |
| */ |
| public abstract Object getOldValue(); |
| |
| /** |
| * @return the new value |
| */ |
| public abstract Object getNewValue(); |
| |
| public boolean equals(Object obj) { |
| if (obj instanceof ValueDiff) { |
| ValueDiff val = (ValueDiff) obj; |
| |
| return Diffs.equals(val.getNewValue(), getNewValue()) |
| && Diffs.equals(val.getOldValue(), getOldValue()); |
| |
| } |
| return false; |
| } |
| |
| /** |
| * @see java.lang.Object#toString() |
| */ |
| public String toString() { |
| StringBuffer buffer = new StringBuffer(); |
| buffer |
| .append(getClass().getName()) |
| .append("{oldValue [") //$NON-NLS-1$ |
| .append(getOldValue() != null ? getOldValue().toString() : "null") //$NON-NLS-1$ |
| .append("], newValue [") //$NON-NLS-1$ |
| .append(getNewValue() != null ? getNewValue().toString() : "null") //$NON-NLS-1$ |
| .append("]}"); //$NON-NLS-1$ |
| |
| return buffer.toString(); |
| } |
| } |