| /******************************************************************************* |
| * Copyright (c) 2005, 2007 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.core.commands.common; |
| |
| import java.util.Comparator; |
| |
| import org.eclipse.core.internal.commands.util.Util; |
| |
| /** |
| * Comparator for instances of <code>NamedHandleObject</code> for display to |
| * an end user. The comparison is based on the name of the instances. |
| * |
| * @since 3.2 |
| */ |
| public class NamedHandleObjectComparator implements Comparator { |
| |
| /** |
| * Compares to instances of NamedHandleObject based on their names. This is |
| * useful is they are display to an end user. |
| * |
| * @param left |
| * The first obect to compare; may be <code>null</code>. |
| * @param right |
| * The second object to compare; may be <code>null</code>. |
| * @return <code>-1</code> if <code>left</code> is <code>null</code> |
| * and <code>right</code> is not <code>null</code>; |
| * <code>0</code> if they are both <code>null</code>; |
| * <code>1</code> if <code>left</code> is not <code>null</code> |
| * and <code>right</code> is <code>null</code>. Otherwise, the |
| * result of <code>left.compareTo(right)</code>. |
| */ |
| public final int compare(final Object left, final Object right) { |
| final NamedHandleObject a = (NamedHandleObject) left; |
| final NamedHandleObject b = (NamedHandleObject) right; |
| |
| String aName = null; |
| try { |
| aName = a.getName(); |
| } catch (final NotDefinedException e) { |
| // Leave aName as null. |
| } |
| String bName = null; |
| try { |
| bName = b.getName(); |
| } catch (final NotDefinedException e) { |
| // Leave bName as null. |
| } |
| |
| return Util.compare(aName, bName); |
| } |
| } |
| |