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/*******************************************************************************
* 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.context.base.IJpaContextNode;
@SuppressWarnings("nls")
public class JpaSelection
implements IJpaSelection
{
private IJpaContextNode selectedNode;
public JpaSelection(IJpaContextNode selectedNode) {
if (selectedNode == null) {
throw new NullPointerException("A 'selectedNode' is required; otherwise use NULL_SELECTION.");
}
this.selectedNode = selectedNode;
}
public IJpaContextNode getSelectedNode() {
return 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;
}
return this.selectedNode.equals(((JpaSelection) obj).selectedNode);
}
@Override
public int hashCode() {
return this.selectedNode.hashCode();
}
@Override
public String toString() {
return selectedNode.toString();
}
}
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