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/*******************************************************************************
* Copyright (c) 2011, 2013 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.comparator;
import java.text.Collator;
import java.util.Comparator;
import java.util.Locale;
import org.eclipse.jpt.common.utility.internal.ObjectTools;
/**
* This collator simply wraps a Java text 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
*/
public class StringCollator
implements Comparator<String>
{
private final Collator collator;
/**
* Wrap the default collator.
* @see Collator#getInstance()
*/
public StringCollator() {
this(Collator.getInstance());
}
/**
* Wrap the collator for the specified locale.
* @see Collator#getInstance(Locale)
*/
public StringCollator(Locale locale) {
this(Collator.getInstance(locale));
}
/**
* Wrap the specified collator.
*/
public StringCollator(Collator collator) {
super();
if (collator == null) {
throw new NullPointerException();
}
this.collator = collator;
}
public int compare(String string1, String string2) {
return this.collator.compare(string1, string2);
}
@Override
public String toString() {
return ObjectTools.toString(this, this.collator);
}
}
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