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/*******************************************************************************
* Copyright (c) 2011, 2012 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.runtime.stepper.stepper;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.tcf.te.runtime.interfaces.properties.IPropertiesContainer;
import org.eclipse.tcf.te.runtime.stepper.StepperAttributeUtil;
import org.eclipse.tcf.te.runtime.stepper.interfaces.IStepContext;
import org.eclipse.tcf.te.runtime.stepper.interfaces.IContextManipulator;
import org.eclipse.tcf.te.runtime.stepper.interfaces.IStepper;
import org.eclipse.tcf.te.runtime.stepper.interfaces.IFullQualifiedId;
/**
* A stepper implementation capable of handling multiple contexts.
* <p>
* The multi context stepper will sequential loop all configured contexts and invoke a single
* context stepper for each context.
*/
public class MultiContextStepper extends SingleContextStepper {
private List<IStepper> steppers = new ArrayList<IStepper>();
public static final String CONTEXT_COUNT = "contextCount"; //$NON-NLS-1$
public static final String CONTEXT_INDEX = "contextIndex"; //$NON-NLS-1$
/**
* Constructor.
*/
public MultiContextStepper() {
super();
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.stepper.extensions.AbstractStepper#onInitialize(org.eclipse.tcf.te.runtime.interfaces.properties.IPropertiesContainer, org.eclipse.tcf.te.runtime.stepper.interfaces.IFullQualifiedId, org.eclipse.core.runtime.IProgressMonitor)
*/
@Override
protected void onInitialize(IPropertiesContainer data, IFullQualifiedId fullQualifiedId, IProgressMonitor monitor) {
super.onInitialize(data, fullQualifiedId, monitor);
IStepContext[] contexts = getContexts();
for (IStepContext context : contexts) {
if (context == null) continue;
// Get the stepper to be used for this context object
IStepper stepper = getStepper(context);
Assert.isNotNull(stepper);
// Build up a new fully qualified id
IFullQualifiedId id = fullQualifiedId.createChildId(ID_TYPE_STEPPER_ID,
(stepper.getId() != null ? stepper.getId() : "org.eclipse.tcf.te.runtime.stepper.singleContext"), //$NON-NLS-1$
"" + steppers.size()); //$NON-NLS-1$
// Initialize the stepper
stepper.initialize(data, id, monitor);
// Associate the context and context id with the calculated id
StepperAttributeUtil.setProperty(IContextManipulator.CONTEXT, id, data, context);
StepperAttributeUtil.setProperty(IContextManipulator.CONTEXT_ID, id, data, context.getId());
// Add the stepper to the list
steppers.add(stepper);
}
data.setProperty("MULTI_CONTEXT", Boolean.toString(steppers.size() > 1)); //$NON-NLS-1$
}
/**
* Returns the stepper to be used for the given target context.
* <p>
* <b>Note:</b> The default implementation does always return a new single context stepper
* instance.
*
* @param context The context. Must not be <code>null</code>.
* @return The stepper instance.
*/
protected IStepper getStepper(IStepContext context) {
Assert.isNotNull(context);
return new SingleContextStepper();
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.stepper.extensions.AbstractStepper#internalExecute(java.util.List)
*/
@Override
protected void internalExecute(List<IStatus> statusContainer) throws CoreException {
int i = 0;
StepperAttributeUtil.setProperty(CONTEXT_COUNT, null, getData(), steppers.size());
for (IStepper stepper : steppers) {
StepperAttributeUtil.setProperty(CONTEXT_INDEX, null, getData(), i++);
try {
stepper.execute();
}
catch (CoreException e) {
if (isCancelable() && getMonitor() != null && getMonitor().isCanceled()) {
throw e;
}
statusContainer.add(e.getStatus());
}
}
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.runtime.stepper.extensions.AbstractStepper#cleanup()
*/
@Override
public void cleanup() {
super.cleanup();
for (IStepper stepper : steppers) {
stepper.cleanup();
}
steppers.clear();
}
}
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