| /******************************************************************************* |
| * Copyright (c) 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.osgi.internal.resolver; |
| |
| import java.util.*; |
| |
| import org.eclipse.osgi.service.resolver.*; |
| import org.osgi.framework.Bundle; |
| |
| public class StateDeltaImpl implements StateDelta { |
| private State state; |
| private Map changes = new HashMap(); |
| public StateDeltaImpl(State state) { |
| this.state = state; |
| } |
| public BundleDelta[] getChanges() { |
| return (BundleDelta[]) changes.values().toArray(new BundleDelta[changes.size()]); |
| } |
| public BundleDelta[] getChanges(int mask, boolean exact) { |
| List result = new ArrayList(); |
| for (Iterator changesIter = changes.values().iterator(); changesIter.hasNext();) { |
| BundleDelta change = (BundleDelta) changesIter.next(); |
| if (change.getType() == mask || (!exact && (change.getType() & mask) == mask)) |
| result.add(change); |
| } |
| return (BundleDelta[]) result.toArray(new BundleDelta[result.size()]); |
| } |
| public State getState() { |
| return state; |
| } |
| void recordBundleAdded(BundleDescriptionImpl added) { |
| Object key = added.getKey(); |
| BundleDeltaImpl change = (BundleDeltaImpl) changes.get(key); |
| if (change != null) { |
| if ((change.getType() & BundleDelta.REMOVED) != 0) |
| change.setType(BundleDelta.UPDATED | (change.getType() & ~BundleDelta.REMOVED)); |
| else |
| throw new IllegalStateException(); |
| } else |
| changes.put(key, new BundleDeltaImpl(added, BundleDelta.ADDED)); |
| |
| } |
| void recordBundleRemoved(BundleDescriptionImpl removed) { |
| Object key = removed.getKey(); |
| BundleDeltaImpl change = (BundleDeltaImpl) changes.get(key); |
| if (change != null) { |
| if ((change.getType() & BundleDelta.ADDED) != 0) { |
| changes.remove(key); |
| return; |
| } |
| change.setType(change.getType() | BundleDelta.REMOVED); |
| } else |
| changes.put(key, new BundleDeltaImpl(removed, BundleDelta.REMOVED)); |
| } |
| void recordConstraintResolved(BundleDescriptionImpl changedLinkage, boolean optional) { |
| Object key = changedLinkage.getKey(); |
| BundleDeltaImpl change = (BundleDeltaImpl) changes.get(key); |
| int newType = optional ? BundleDelta.OPTIONAL_LINKAGE_CHANGED : BundleDelta.LINKAGE_CHANGED; |
| // LINKAGE_CHANGED overrides OPTIONAL_LINKAGE_CHANGED, but nothing else |
| if (change == null || (newType == BundleDelta.LINKAGE_CHANGED && change.getType() == BundleDelta.OPTIONAL_LINKAGE_CHANGED)) |
| changes.put(key, new BundleDeltaImpl(changedLinkage, newType)); |
| } |
| void recordBundleResolved(BundleDescriptionImpl resolved, int status) { |
| Object key = resolved.getKey(); |
| BundleDeltaImpl change = (BundleDeltaImpl) changes.get(key); |
| int newType = status == Bundle.RESOLVED ? BundleDelta.RESOLVED : BundleDelta.UNRESOLVED; |
| if (change == null) { |
| change = new BundleDeltaImpl(resolved, newType); |
| changes.put(key, change); |
| return; |
| } |
| int currentType = change.getType(); |
| if ((newType == BundleDelta.RESOLVED && currentType == BundleDelta.UNRESOLVED) || (newType == BundleDelta.UNRESOLVED && currentType == BundleDelta.RESOLVED)) { |
| changes.remove(key); |
| return; |
| } |
| // new type will have only one of RESOLVED|UNRESOLVED bits set |
| newType = newType | (currentType & ~(BundleDelta.RESOLVED | BundleDelta.UNRESOLVED)); |
| change.setType(newType); |
| } |
| } |