Copyright (c) 2000, 2013 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.debug.internal.core;


import java.util.Comparator;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;

import org.eclipse.debug.core.DebugPlugin;

Proxy to a runtime classpath entry resolver extension.
See Also:
IConfigurationElementConstants/**
 * Proxy to a runtime classpath entry resolver extension.
 *
 * @see IConfigurationElementConstants
 */
public class LaunchConfigurationComparator implements Comparator<Object> {

	private IConfigurationElement fConfigurationElement;

	private Comparator<Object> fDelegate;

	
Constructs a new resolver on the given configuration element
Params:
element – configuration element/**
	 * Constructs a new resolver on the given configuration element
	 *
	 * @param element configuration element
	 */
	public LaunchConfigurationComparator(IConfigurationElement element) {
		fConfigurationElement = element;
	}

	
Returns the Comparator delegate 
Returns:
the Comparator/**
	 * Returns the {@link Comparator} delegate
	 *
	 * @return the {@link Comparator}
	 */
	protected Comparator<Object> getComparator() {
		if (fDelegate == null) {
			try {
				@SuppressWarnings("unchecked")
				Comparator<Object> delegate = (Comparator<Object>) fConfigurationElement.createExecutableExtension(IConfigurationElementConstants.CLASS);
				fDelegate = delegate;
			} catch (CoreException e) {
				DebugPlugin.log(e);
			}
		}
		return fDelegate;
	}


	
See Also:
compare.compare(Object, Object)/**
	 * @see Comparator#compare(Object, Object)
	 */
	@Override
	public int compare(Object o1, Object o2) {
		return getComparator().compare(o1, o2);
	}

	
See Also:
equals.equals(Object)/**
	 * @see Object#equals(Object)
	 */
	@Override
	public boolean equals(Object obj) {
		return getComparator().equals(obj);
	}

	@Override
	public int hashCode() {
		return getComparator().hashCode();
	}
}