/*******************************************************************************
* Copyright (c) 2007, 2008 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.pde.internal.ui.views.dependencies;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.osgi.service.resolver.*;
import org.eclipse.pde.internal.ui.PDEPlugin;
public class DependenciesViewComparator extends ViewerComparator {
private static DependenciesViewComparator fComparator = null;
private DependenciesViewComparator() {
super();
}
public int compare(Viewer viewer, Object e1, Object e2) {
return getId(e1).compareTo(getId(e2));
}
private String getId(Object obj) {
BundleDescription desc = null;
if (obj instanceof ImportPackageSpecification) {
return ((ImportPackageSpecification) obj).getName();
} else if (obj instanceof BundleSpecification) {
desc = (BundleDescription) ((BundleSpecification) obj).getSupplier();
} else if (obj instanceof BundleDescription)
desc = (BundleDescription) obj;
if (desc != null)
return PDEPlugin.getDefault().getLabelProvider().getObjectText(desc);
return ""; //$NON-NLS-1$
}
public static DependenciesViewComparator getViewerComparator() {
if (fComparator == null)
fComparator = new DependenciesViewComparator();
return fComparator;
}
}
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