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/*****************************************************************************
* Copyright (c) 2010 CEA LIST.
*
* 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:
* Camille Letavernier (CEA LIST) camille.letavernier@cea.fr - Initial API and implementation
*****************************************************************************/
package org.eclipse.papyrus.customization.properties.generation.generators;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.emf.common.util.BasicDiagnostic;
import org.eclipse.emf.common.util.Diagnostic;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.emf.ecore.resource.impl.ResourceSetImpl;
import org.eclipse.m2m.qvt.oml.BasicModelExtent;
import org.eclipse.m2m.qvt.oml.ExecutionContextImpl;
import org.eclipse.m2m.qvt.oml.ExecutionDiagnostic;
import org.eclipse.m2m.qvt.oml.ModelExtent;
import org.eclipse.m2m.qvt.oml.TransformationExecutor;
import org.eclipse.m2m.qvt.oml.util.WriterLog;
import org.eclipse.papyrus.customization.properties.generation.Activator;
import org.eclipse.papyrus.views.properties.contexts.Context;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
/**
* An Abstract generator based on QVTO transformations.
* Subclasses should specify the .qvto file and ModelExtents, as well as the
* SWT widgets allowing the user to chose the input models.
*
* @author Camille Letavernier
*/
public abstract class AbstractQVTGenerator implements IGenerator, Listener {
/**
* The Contexts created by the transformation.
*/
protected List<Context> generatedContexts;
/**
* The output ModelExtent
*/
protected ModelExtent out;
private Set<Listener> listeners = new HashSet<Listener>();
public List<Context> generate(URI targetURI) {
URI transformationURI = getTransformationURI();
TransformationExecutor executor = new TransformationExecutor(transformationURI);
Diagnostic diagnostic = executor.loadTransformation();
if(diagnostic.getSeverity() != Diagnostic.OK) {
Activator.log.warn("Cannot load the transformation : " + transformationURI);
return generatedContexts = null;
}
List<ModelExtent> extents = getModelExtents();
ExecutionContextImpl context = new ExecutionContextImpl();
context.setConfigProperty("keepModeling", true); //$NON-NLS-1$
context.setLog(new WriterLog(new OutputStreamWriter(System.out)));
ExecutionDiagnostic result = executor.execute(context, extents.toArray(new ModelExtent[0]));
if(result.getSeverity() == org.eclipse.emf.common.util.Diagnostic.OK) {
List<EObject> outObjects = getOutContextExtent().getContents();
Object objectResult = outObjects.get(0);
if(!(objectResult instanceof Context)) {
return null;
}
ResourceSet resourceSet = new ResourceSetImpl();
Resource contextResource = resourceSet.createResource(targetURI);
contextResource.getContents().addAll(outObjects);
return generatedContexts = getContexts(outObjects);
} else {
IStatus status = BasicDiagnostic.toIStatus(result);
Activator.log.warn(String.format("%s : %s", status.getPlugin(), status.getMessage()));
}
return generatedContexts = null;
}
/**
* @return the list of in/out/inout ModelExtents (including the OutContextExtent)
* Implementors should ensure they add the outContextExtent to the list.
*/
abstract protected List<ModelExtent> getModelExtents();
/**
* @return the ModelExtent containing the generated context
*/
protected ModelExtent getOutContextExtent() {
if(out == null) {
out = new BasicModelExtent();
}
return out;
}
/**
* @return the URI of the QVTO transformation file.
*/
abstract protected URI getTransformationURI();
/**
* Loads the EObject from the given URI.
*
* @param uri
* The URI from which the EObject is loaded
* @return
* The loaded EObject, or null if an error occured
* @throws IOException
* If the URI isn't a valid EObject
*/
protected EObject loadEMFModel(URI uri) throws IOException {
ResourceSet resourceSet = new ResourceSetImpl();
try {
Resource resource = resourceSet.getResource(uri, true);
if(resource != null) {
if(!resource.getContents().isEmpty()) {
return resource.getContents().get(0);
}
}
} catch (Exception ex) {
throw new IOException(ex.toString());
}
return null;
}
public void addListener(Listener listener) {
listeners.add(listener);
}
public void removeListener(Listener listener) {
listeners.remove(listener);
}
public void handleEvent(Event event) {
for(Listener listener : listeners) {
listener.handleEvent(event);
}
}
/**
* Return the generated Context from a list of EObjects
*
* @param outObjects
* The list of EObjects from which the context will be retrieved
* @return
* The main generated context
*/
protected List<Context> getContexts(List<EObject> outObjects) {
List<Context> result = new LinkedList<Context>();
for(Object objectResult : outObjects) {
if(objectResult instanceof Context) {
result.add((Context)objectResult);
}
}
return result;
}
}
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