01: /*******************************************************************************
02: * Copyright (c) 2007 IBM Corporation and others.
03: * All rights reserved. This program and the accompanying materials
04: * are made available under the terms of the Eclipse Public License v1.0
05: * which accompanies this distribution, and is available at
06: * http://www.eclipse.org/legal/epl-v10.html
07: *
08: * Contributors:
09: * IBM Corporation - initial API and implementation
10: *******************************************************************************/package org.eclipse.pde.internal.ui.views.dependencies;
11:
12: import org.eclipse.jface.viewers.Viewer;
13: import org.eclipse.jface.viewers.ViewerComparator;
14: import org.eclipse.osgi.service.resolver.BundleDescription;
15: import org.eclipse.osgi.service.resolver.BundleSpecification;
16: import org.eclipse.osgi.service.resolver.ImportPackageSpecification;
17: import org.eclipse.pde.internal.ui.PDEPlugin;
18:
19: public class DependenciesViewComparator extends ViewerComparator {
20:
21: private static DependenciesViewComparator fComparator = null;
22:
23: private DependenciesViewComparator() {
24: super ();
25: }
26:
27: public int compare(Viewer viewer, Object e1, Object e2) {
28: return getId(e1).compareTo(getId(e2));
29: }
30:
31: private String getId(Object obj) {
32: BundleDescription desc = null;
33: if (obj instanceof ImportPackageSpecification) {
34: return ((ImportPackageSpecification) obj).getName();
35: } else if (obj instanceof BundleSpecification) {
36: desc = (BundleDescription) ((BundleSpecification) obj)
37: .getSupplier();
38: } else if (obj instanceof BundleDescription)
39: desc = (BundleDescription) obj;
40: if (desc != null)
41: return PDEPlugin.getDefault().getLabelProvider()
42: .getObjectText(desc);
43: return ""; //$NON-NLS-1$
44: }
45:
46: public static DependenciesViewComparator getViewerComparator() {
47: if (fComparator == null)
48: fComparator = new DependenciesViewComparator();
49: return fComparator;
50: }
51:
52: }
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