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/*******************************************************************************
* Copyright (c) 2003, 2010 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
* Rob Harrop - SpringSource Inc. (bug 247522)
*******************************************************************************/
package org.eclipse.osgi.internal.resolver;
import java.util.*;
import org.eclipse.osgi.service.resolver.*;
import org.osgi.framework.BundleException;
/**
* This implementation of State does a bookkeeping of all added/removed
*/
public class UserState extends StateImpl {
// TODO this is not an accurate way to record updates
private final Set<String> updated = Collections.synchronizedSet(new HashSet<String>());
public boolean removeBundle(BundleDescription description) {
if (description.getLocation() != null)
updated.remove(description.getLocation());
if (!super.removeBundle(description))
return false;
return true;
}
public boolean updateBundle(BundleDescription newDescription) {
if (!super.updateBundle(newDescription))
return false;
updated.add(newDescription.getLocation());
return true;
}
/**
* @throws BundleException
*/
public StateDelta compare(State baseState) throws BundleException {
BundleDescription[] current = this.getBundles();
StateDeltaImpl delta = new StateDeltaImpl(this);
// process additions and updates
for (int i = 0; i < current.length; i++) {
BundleDescription existing = baseState.getBundleByLocation(current[i].getLocation());
if (existing == null)
delta.recordBundleAdded((BundleDescriptionImpl) current[i]);
else if (updated.contains(current[i].getLocation()))
delta.recordBundleUpdated((BundleDescriptionImpl) current[i]);
}
// process removals
BundleDescription[] existing = baseState.getBundles();
for (int i = 0; i < existing.length; i++) {
BundleDescription local = getBundleByLocation(existing[i].getLocation());
if (local == null)
delta.recordBundleRemoved((BundleDescriptionImpl) existing[i]);
}
return delta;
}
}
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