| /******************************************************************************* |
| * Copyright (c) 2006, 2008 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.jpa.ui.internal.selection; |
| |
| import org.eclipse.jpt.jpa.core.JpaStructureNode; |
| |
| /** |
| * Straightforward implementation of the JpaSelection interface. |
| */ |
| public class DefaultJpaSelection |
| implements JpaSelection |
| { |
| private final JpaStructureNode selectedNode; |
| |
| |
| public DefaultJpaSelection(JpaStructureNode selectedNode) { |
| super(); |
| if (selectedNode == null) { |
| throw new NullPointerException("A 'selectedNode' is required; otherwise use NULL_SELECTION."); |
| } |
| this.selectedNode = selectedNode; |
| } |
| |
| public JpaStructureNode getSelectedNode() { |
| return this.selectedNode; |
| } |
| |
| public boolean isEmpty() { |
| // by definition, this selection is never empty |
| // use IJpaSelection.NULL_SELECTION for empty selections |
| return false; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (! (obj instanceof JpaSelection)) { |
| return false; |
| } |
| JpaSelection other = (JpaSelection) obj; |
| return ( ! other.isEmpty()) && this.selectedNode.equals(other.getSelectedNode()); |
| } |
| |
| @Override |
| public int hashCode() { |
| return this.selectedNode.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return this.selectedNode.toString(); |
| } |
| |
| } |