/*******************************************************************************
* Copyright (c) 2011 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.tm.te.runtime.stepper.internal.extensions;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.eclipse.core.runtime.Assert;
import org.eclipse.tm.te.runtime.extensions.AbstractExtensionPointManager;
import org.eclipse.tm.te.runtime.extensions.ExecutableExtensionProxy;
import org.eclipse.tm.te.runtime.stepper.interfaces.IContextStep;
/**
* Step extension point manager implementation.
*/
public class StepExtensionPointManager extends AbstractExtensionPointManager<IContextStep> {
/* (non-Javadoc)
* @see org.eclipse.tm.te.runtime.extensions.AbstractExtensionPointManager#getExtensionPointId()
*/
@Override
protected String getExtensionPointId() {
return "org.eclipse.tm.te.runtime.stepper.steps"; //$NON-NLS-1$
}
/* (non-Javadoc)
* @see org.eclipse.tm.te.runtime.extensions.AbstractExtensionPointManager#getConfigurationElementName()
*/
@Override
protected String getConfigurationElementName() {
return "step"; //$NON-NLS-1$
}
/**
* Returns the list of all contributed steps.
*
* @param unique If <code>true</code>, the method returns new instances for each
* contributed step.
*
* @return The list of contributed steps, or an empty array.
*/
public IContextStep[] getSteps(boolean unique) {
List<IContextStep> contributions = new ArrayList<IContextStep>();
Collection<ExecutableExtensionProxy<IContextStep>> delegates = getExtensions().values();
for (ExecutableExtensionProxy<IContextStep> delegate : delegates) {
IContextStep instance = unique ? delegate.newInstance() : delegate.getInstance();
if (instance != null && !contributions.contains(instance)) {
contributions.add(instance);
}
}
return contributions.toArray(new IContextStep[contributions.size()]);
}
/**
* Returns the step identified by its unique id. If no step with the specified id is registered,
* <code>null</code> is returned.
*
* @param id The unique id of the step or <code>null</code>
* @param unique If <code>true</code>, the method returns new instances of the step contribution.
*
* @return The step instance or <code>null</code>.
*/
public IContextStep getStep(String id, boolean unique) {
Assert.isNotNull(id);
IContextStep contribution = null;
if (getExtensions().containsKey(id)) {
ExecutableExtensionProxy<IContextStep> proxy = getExtensions().get(id);
// Get the extension instance
contribution = unique ? proxy.newInstance() : proxy.getInstance();
}
return contribution;
}
}