| /******************************************************************************* |
| * Copyright (c) 2006, 2007 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.ui.internal.selection; |
| |
| import org.eclipse.jpt.core.internal.IJpaContentNode; |
| |
| |
| public class Selection |
| { |
| public static Selection NULL_SELECTION = new Selection(); |
| |
| private IJpaContentNode selectedNode; |
| |
| |
| /* Used internally - only for NULL_SELECTION */ |
| private Selection() { |
| super(); |
| } |
| |
| public Selection(IJpaContentNode selectedNode) { |
| if (selectedNode == null) { |
| throw new NullPointerException("A 'selectedNode' is required; otherwise use NULL_SELECTION."); |
| } |
| this.selectedNode = selectedNode; |
| } |
| |
| public IJpaContentNode getSelectedNode() { |
| return selectedNode; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (! (obj instanceof Selection)) { |
| return false; |
| } |
| |
| if ((this == NULL_SELECTION) && (obj == NULL_SELECTION)) { |
| return true; |
| } |
| |
| if ((this == NULL_SELECTION) || (obj == NULL_SELECTION)) { |
| return false; |
| } |
| |
| return this.selectedNode.equals(((Selection) obj).selectedNode); |
| } |
| |
| @Override |
| public int hashCode() { |
| return (this == NULL_SELECTION) ? |
| super.hashCode() |
| : |
| this.selectedNode.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return (this == NULL_SELECTION) ? |
| "NULL_SELECTION" |
| : |
| selectedNode.toString(); |
| } |
| |
| } |