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/*******************************************************************************
* Copyright (c) 2000, 2013 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.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 IConfigurationElementConstants
*/
public class LaunchConfigurationComparator implements Comparator<Object> {
private IConfigurationElement fConfigurationElement;
private Comparator<Object> fDelegate;
/**
* Constructs a new resolver on the given configuration element
*
* @param element configuration element
*/
public LaunchConfigurationComparator(IConfigurationElement element) {
fConfigurationElement = element;
}
/**
* Returns the {@link Comparator} delegate
*
* @return the {@link Comparator}
*/
@SuppressWarnings("unchecked")
protected Comparator<Object> getComparator() {
if (fDelegate == null) {
try {
fDelegate = (Comparator<Object>) fConfigurationElement.createExecutableExtension(IConfigurationElementConstants.CLASS);
} catch (CoreException e) {
DebugPlugin.log(e);
}
}
return fDelegate;
}
/**
* @see Comparator#compare(Object, Object)
*/
@Override
public int compare(Object o1, Object o2) {
return getComparator().compare(o1, o2);
}
/**
* @see Object#equals(Object)
*/
@Override
public boolean equals(Object obj) {
return getComparator().equals(obj);
}
@Override
public int hashCode() {
return getComparator().hashCode();
}
}
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