| /******************************************************************************* |
| * Copyright (c) 2011 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.common.utility.internal; |
| |
| import java.io.Serializable; |
| import java.text.Collator; |
| import java.util.Comparator; |
| |
| /** |
| * This collator simply wraps the default Java collator and implements a |
| * {@link String} {@link Comparator} (instead of an {@link Object} |
| * {@link Comparator}, which is what {@link Collator} does, possibly for |
| * backward-compatibility reasons(?)). |
| * |
| * @see Collator#getInstance() |
| */ |
| public class StringCollator |
| implements Comparator<String>, Serializable |
| { |
| // singleton |
| private static final StringCollator INSTANCE = new StringCollator(); |
| |
| /** |
| * Return the singleton. |
| */ |
| public static Comparator<String> instance() { |
| return INSTANCE; |
| } |
| |
| /** |
| * Ensure single instance. |
| */ |
| private StringCollator() { |
| super(); |
| } |
| |
| public int compare(String string1, String string2) { |
| return Collator.getInstance().compare(string1, string2); |
| } |
| |
| @Override |
| public String toString() { |
| return this.getClass().getSimpleName(); |
| } |
| |
| private static final long serialVersionUID = 1L; |
| private Object readResolve() { |
| // replace this object with the singleton |
| return INSTANCE; |
| } |
| } |