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/*******************************************************************************
* Copyright (c) 2003, 2011 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
* Rob Harrop - SpringSource Inc. (bug 247522)
*******************************************************************************/
package org.eclipse.osgi.internal.resolver;
import java.util.*;
import org.eclipse.osgi.service.resolver.*;
/**
* This class is threadsafe.
*
*/
final class StateDeltaImpl implements StateDelta {
private final State state;
private final Map<BundleDescription, BundleDelta> changes = new HashMap<BundleDescription, BundleDelta>();
private ResolverHookException error;
public StateDeltaImpl(State state) {
this.state = state;
}
public BundleDelta[] getChanges() {
synchronized (this.changes) {
return changes.values().toArray(new BundleDelta[changes.size()]);
}
}
public BundleDelta[] getChanges(int mask, boolean exact) {
synchronized (this.changes) {
List<BundleDelta> result = new ArrayList<BundleDelta>();
for (Iterator<BundleDelta> changesIter = changes.values().iterator(); changesIter.hasNext();) {
BundleDelta change = changesIter.next();
if (mask == change.getType() || (!exact && (change.getType() & mask) != 0))
result.add(change);
}
return result.toArray(new BundleDelta[result.size()]);
}
}
public State getState() {
return state;
}
public ResolverHookException getResovlerHookException() {
return error;
}
void setResolverHookException(ResolverHookException error) {
this.error = error;
}
void recordBundleAdded(BundleDescriptionImpl added) {
synchronized (this.changes) {
BundleDeltaImpl change = (BundleDeltaImpl) changes.get(added);
if (change == null) {
changes.put(added, new BundleDeltaImpl(added, BundleDelta.ADDED));
return;
}
if (change.getType() == BundleDelta.REMOVED) {
changes.remove(added);
return;
}
int newType = change.getType();
if ((newType & BundleDelta.REMOVED) != 0)
newType &= ~BundleDelta.REMOVED;
change.setType(newType | BundleDelta.ADDED);
change.setBundle(added);
}
}
void recordBundleUpdated(BundleDescriptionImpl updated) {
synchronized (this.changes) {
BundleDeltaImpl change = (BundleDeltaImpl) changes.get(updated);
if (change == null) {
changes.put(updated, new BundleDeltaImpl(updated, BundleDelta.UPDATED));
return;
}
if ((change.getType() & (BundleDelta.ADDED | BundleDelta.REMOVED)) != 0)
return;
change.setType(change.getType() | BundleDelta.UPDATED);
change.setBundle(updated);
}
}
void recordBundleRemoved(BundleDescriptionImpl removed) {
synchronized (this.changes) {
BundleDeltaImpl change = (BundleDeltaImpl) changes.get(removed);
if (change == null) {
changes.put(removed, new BundleDeltaImpl(removed, BundleDelta.REMOVED));
return;
}
if (change.getType() == BundleDelta.ADDED) {
changes.remove(removed);
return;
}
int newType = change.getType();
if ((newType & BundleDelta.ADDED) != 0)
newType &= ~BundleDelta.ADDED;
change.setType(newType | BundleDelta.REMOVED);
}
}
void recordBundleRemovalPending(BundleDescriptionImpl removed) {
synchronized (this.changes) {
BundleDeltaImpl change = (BundleDeltaImpl) changes.get(removed);
if (change == null) {
changes.put(removed, new BundleDeltaImpl(removed, BundleDelta.REMOVAL_PENDING));
return;
}
int newType = change.getType();
if ((newType & BundleDelta.REMOVAL_COMPLETE) != 0)
newType &= ~BundleDelta.REMOVAL_COMPLETE;
change.setType(newType | BundleDelta.REMOVAL_PENDING);
}
}
void recordBundleRemovalComplete(BundleDescriptionImpl removed) {
synchronized (this.changes) {
BundleDeltaImpl change = (BundleDeltaImpl) changes.get(removed);
if (change == null) {
changes.put(removed, new BundleDeltaImpl(removed, BundleDelta.REMOVAL_COMPLETE));
return;
}
int newType = change.getType();
if ((newType & BundleDelta.REMOVAL_PENDING) != 0)
newType &= ~BundleDelta.REMOVAL_PENDING;
change.setType(newType | BundleDelta.REMOVAL_COMPLETE);
}
}
void recordBundleResolved(BundleDescriptionImpl resolved, boolean result) {
synchronized (this.changes) {
if (resolved.isResolved() == result)
return; // do not record anything if nothing has changed
BundleDeltaImpl change = (BundleDeltaImpl) changes.get(resolved);
int newType = result ? BundleDelta.RESOLVED : BundleDelta.UNRESOLVED;
if (change == null) {
change = new BundleDeltaImpl(resolved, newType);
changes.put(resolved, change);
return;
}
// new type will have only one of RESOLVED|UNRESOLVED bits set
newType = newType | (change.getType() & ~(BundleDelta.RESOLVED | BundleDelta.UNRESOLVED));
change.setType(newType);
change.setBundle(resolved);
}
}
}
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