| /******************************************************************************* |
| * 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 { |
| |
| @Override |
| 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); |
| } |
| |
| @Override |
| 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; |
| } |
| |
| } |