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/*******************************************************************************
* Copyright (c) 2000, 2010 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.equinox.internal.p2.ui.viewers;
import java.net.URI;
import org.eclipse.equinox.internal.p2.ui.ProvUI;
import org.eclipse.equinox.internal.p2.ui.model.*;
import org.eclipse.equinox.p2.engine.IProfile;
import org.eclipse.equinox.p2.metadata.IInstallableUnit;
import org.eclipse.jface.viewers.IElementComparer;
public class ProvElementComparer implements IElementComparer {
public boolean equals(Object a, Object b) {
// We treat category elements specially because this
// is one case where resolving down to an IU will lose identity
// differences. (category IU's with the same name and version number cannot be treated the same).
if (a instanceof CategoryElement || b instanceof CategoryElement)
return a.equals(b);
IInstallableUnit iu1 = getIU(a);
IInstallableUnit iu2 = getIU(b);
if (iu1 != null && iu2 != null)
return iu1.equals(iu2);
String p1 = getProfileId(a);
String p2 = getProfileId(b);
if (p1 != null && p2 != null)
return p1.equals(p2);
URI r1 = getRepositoryLocation(a);
URI r2 = getRepositoryLocation(b);
if (r1 != null && r2 != null)
return r1.equals(r2);
return a.equals(b);
}
public int hashCode(Object element) {
if (element instanceof CategoryElement)
return element.hashCode();
IInstallableUnit iu = getIU(element);
if (iu != null)
return iu.hashCode();
String profileId = getProfileId(element);
if (profileId != null)
return profileId.hashCode();
URI location = getRepositoryLocation(element);
if (location != null)
return location.hashCode();
return element.hashCode();
}
private IInstallableUnit getIU(Object obj) {
return ProvUI.getAdapter(obj, IInstallableUnit.class);
}
private String getProfileId(Object obj) {
if (obj instanceof ProfileElement)
return ((ProfileElement) obj).getLabel(obj);
IProfile profile = ProvUI.getAdapter(obj, IProfile.class);
if (profile == null)
return null;
return profile.getProfileId();
}
private URI getRepositoryLocation(Object obj) {
if (obj instanceof IRepositoryElement<?>)
return ((IRepositoryElement<?>) obj).getLocation();
return null;
}
}
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