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/*******************************************************************************
* Copyright (c) 2007, 2009 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.provisional.p2.engine;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.p2.engine.ActionManager;
import org.eclipse.equinox.internal.p2.engine.EngineActivator;
import org.eclipse.osgi.util.NLS;
public abstract class PhaseSet {
private final Phase[] phases;
public PhaseSet(Phase[] phases) {
if (phases == null)
throw new IllegalArgumentException(Messages.null_phases);
this.phases = phases;
}
public final MultiStatus perform(ActionManager actionManager, EngineSession session, IProfile profile, Operand[] operands, ProvisioningContext context, IProgressMonitor monitor) {
MultiStatus status = new MultiStatus(EngineActivator.ID, IStatus.OK, null, null);
int[] weights = getProgressWeights(operands);
int totalWork = getTotalWork(weights);
SubMonitor pm = SubMonitor.convert(monitor, totalWork);
try {
for (int i = 0; i < phases.length; i++) {
if (pm.isCanceled()) {
status.add(Status.CANCEL_STATUS);
return status;
}
Phase phase = phases[i];
phase.actionManager = actionManager;
try {
phase.perform(status, session, profile, operands, context, pm.newChild(weights[i]));
} catch (OperationCanceledException e) {
// propagate operation cancellation
status.add(new Status(IStatus.CANCEL, EngineActivator.ID, e.getMessage(), e));
} catch (RuntimeException e) {
// "perform" calls user code and might throw an unchecked exception
// we catch the error here to gather information on where the problem occurred.
status.add(new Status(IStatus.ERROR, EngineActivator.ID, e.getMessage(), e));
} catch (LinkageError e) {
// Catch linkage errors as these are generally recoverable but let other Errors propagate (see bug 222001)
status.add(new Status(IStatus.ERROR, EngineActivator.ID, e.getMessage(), e));
} finally {
phase.actionManager = null;
}
if (status.matches(IStatus.CANCEL)) {
MultiStatus result = new MultiStatus(EngineActivator.ID, IStatus.CANCEL, Messages.Engine_Operation_Canceled_By_User, null);
result.merge(status);
return result;
} else if (status.matches(IStatus.ERROR)) {
MultiStatus result = new MultiStatus(EngineActivator.ID, IStatus.ERROR, phase.getProblemMessage(), null);
result.add(new Status(IStatus.ERROR, EngineActivator.ID, session.getContextString(), null));
result.merge(status);
return result;
}
}
} finally {
pm.done();
}
return status;
}
public final IStatus validate(ActionManager actionManager, IProfile profile, Operand[] operands, ProvisioningContext context, IProgressMonitor monitor) {
Set missingActions = new HashSet();
for (int i = 0; i < phases.length; i++) {
Phase phase = phases[i];
phase.actionManager = actionManager;
try {
for (int j = 0; j < operands.length; j++) {
Operand operand = operands[j];
try {
if (!phase.isApplicable(operand))
continue;
ProvisioningAction[] actions = phase.getActions(operand);
if (actions == null)
continue;
for (int k = 0; k < actions.length; k++) {
ProvisioningAction action = actions[k];
if (action instanceof MissingAction)
missingActions.add(action);
}
} catch (RuntimeException e) {
// "perform" calls user code and might throw an unchecked exception
// we catch the error here to gather information on where the problem occurred.
return new Status(IStatus.ERROR, EngineActivator.ID, e.getMessage() + " " + getContextString(profile, phase, operand), e); //$NON-NLS-1$
} catch (LinkageError e) {
// Catch linkage errors as these are generally recoverable but let other Errors propagate (see bug 222001)
return new Status(IStatus.ERROR, EngineActivator.ID, e.getMessage() + " " + getContextString(profile, phase, operand), e); //$NON-NLS-1$
}
}
} finally {
phase.actionManager = null;
}
}
if (!missingActions.isEmpty()) {
MissingAction[] missingActionsArray = (MissingAction[]) missingActions.toArray(new MissingAction[missingActions.size()]);
MissingActionsException exception = new MissingActionsException(missingActionsArray);
return (new Status(IStatus.ERROR, EngineActivator.ID, exception.getMessage(), exception));
}
return Status.OK_STATUS;
}
private String getContextString(IProfile profile, Phase phase, Operand operand) {
return NLS.bind(Messages.session_context, new Object[] {profile.getProfileId(), phase.getClass().getName(), operand.toString(), ""}); //$NON-NLS-1$
}
private int getTotalWork(int[] weights) {
int sum = 0;
for (int i = 0; i < weights.length; i++)
sum += weights[i];
return sum;
}
private int[] getProgressWeights(Operand[] operands) {
int[] weights = new int[phases.length];
for (int i = 0; i < phases.length; i += 1) {
if (operands.length > 0)
//alter weights according to the number of operands applicable to that phase
weights[i] = (phases[i].weight * countApplicable(phases[i], operands) / operands.length);
else
weights[i] = phases[i].weight;
}
return weights;
}
private int countApplicable(Phase phase, Operand[] operands) {
int count = 0;
for (int i = 0; i < operands.length; i++) {
if (phase.isApplicable(operands[i]))
count++;
}
return count;
}
public Phase[] getPhases() {
return phases;
}
}
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