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annotate org.eclipse.core.commands/src/org/eclipse/core/commands/common/NamedHandleObjectComparator.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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bc29606a740c Added dwt-addons in original directory structure of eclipse.org
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1 /*******************************************************************************
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2 * Copyright (c) 2005, 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
bc29606a740c Added dwt-addons in original directory structure of eclipse.org
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module org.eclipse.core.commands.common.NamedHandleObjectComparator;
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14
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15 import org.eclipse.core.commands.common.NotDefinedException;
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16 import org.eclipse.core.commands.common.NamedHandleObject;
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17 import org.eclipse.core.internal.commands.util.Util;
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18 import java.lang.all;
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19 /**
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20 * Comparator for instances of <code>NamedHandleObject</code> for display to
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21 * an end user. The comparison is based on the name of the instances.
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22 *
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23 * @since 3.2
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24 */
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25 public class NamedHandleObjectComparator /+: Comparator+/ {
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26
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27 /**
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28 * Compares to instances of NamedHandleObject based on their names. This is
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29 * useful is they are display to an end user.
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30 *
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31 * @param left
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32 * The first obect to compare; may be <code>null</code>.
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33 * @param right
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34 * The second object to compare; may be <code>null</code>.
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35 * @return <code>-1</code> if <code>left</code> is <code>null</code>
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36 * and <code>right</code> is not <code>null</code>;
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37 * <code>0</code> if they are both <code>null</code>;
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38 * <code>1</code> if <code>left</code> is not <code>null</code>
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39 * and <code>right</code> is <code>null</code>. Otherwise, the
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40 * result of <code>left.compareTo(right)</code>.
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41 */
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42 public final int compare(Object left, Object right) {
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43 NamedHandleObject a = cast(NamedHandleObject) left;
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44 NamedHandleObject b = cast(NamedHandleObject) right;
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45
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46 String aName = null;
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47 try {
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48 aName = a.getName();
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49 } catch (NotDefinedException e) {
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50 // Leave aName as null.
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51 }
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52 String bName = null;
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53 try {
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54 bName = b.getName();
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55 } catch (NotDefinedException e) {
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56 // Leave bName as null.
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57 }
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58
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59 return Util.compare(aName, bName);
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60 }
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61 }