| /******************************************************************************* |
| * 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() {} |
| |
| public Selection(IJpaContentNode node) { |
| if (node == null) { |
| throw new IllegalArgumentException("Must have non-null node. Use NULL_SELECTION otherwise."); |
| } |
| |
| selectedNode = node; |
| } |
| |
| public IJpaContentNode getSelectedNode() { |
| return selectedNode; |
| } |
| |
| 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); |
| } |
| |
| public int hashCode() { |
| if (this == NULL_SELECTION) { |
| return super.hashCode(); |
| } |
| else { |
| return this.selectedNode.hashCode(); |
| } |
| } |
| |
| public String toString() { |
| if (this == NULL_SELECTION) { |
| return "NULL_SELECTION"; |
| } |
| else { |
| return selectedNode.toString(); |
| } |
| } |
| } |