org.summer.sdt.internal.debug.ui.jres.JREsEnvironmentComparator.java Source code

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Here is the source code for org.summer.sdt.internal.debug.ui.jres.JREsEnvironmentComparator.java

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/*******************************************************************************
 * Copyright (c) 2005, 2012 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.summer.sdt.internal.debug.ui.jres;

import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.summer.sdt.launching.IVMInstall;
import org.summer.sdt.launching.environments.IExecutionEnvironment;

/**
 * Sorts execution environments.
 * 
 * @since 3.3
 */
public class JREsEnvironmentComparator extends ViewerComparator {

    IExecutionEnvironment fEnvironment;

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ViewerSorter#category(java.lang.Object)
     */
    @Override
    public int category(Object element) {
        if (fEnvironment == null) {
            return super.category(element);
        }
        if (fEnvironment.isStrictlyCompatible((IVMInstall) element)) {
            return 0;
        }
        return 1;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ViewerSorter#compare(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
     */
    @Override
    public int compare(Viewer viewer, Object e1, Object e2) {
        fEnvironment = (IExecutionEnvironment) viewer.getInput();
        int result = super.compare(viewer, e1, e2);
        fEnvironment = null;
        return result;
    }

}