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/*****************************************************************************
* Copyright (c) 2009 Atos Origin.
*
*
* 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:
* Tristan Faure (Atos Origin) tristan.faure@atosorigin.com - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.resource.migration.controller;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import org.eclipse.emf.codegen.ecore.genmodel.GenModel;
import org.eclipse.emf.codegen.ecore.genmodel.GenPackage;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EPackage;
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.emf.ecore.util.EcoreUtil;
import org.eclipse.papyrus.resource.ResourcePackage;
import org.eclipse.papyrus.resource.migration.controller.exceptions.URINotValidException;
/**
* This class makes comaptible a genmodel with Resource meta model
*
* @author tristan.faure@atosorigin.com
*
*/
public class GenModelUpdater {
/**
* The URI for Resource Genmodel
*/
private static final URI uriForResourceGenModel = URI
.createURI("platform:/plugin/org.eclipse.papyrus.resource/model/resource.genmodel");
/**
* The URI for Resource Ecore meta model
*/
private static final URI uriForEclassResourceEObject = URI
.createURI("platform:/plugin/org.eclipse.papyrus.resource/model/resource.ecore#//ResourceEObject");
/**
* instance of resource package used to reference usedGenpackage in the original genmodel
*/
private ResourcePackage resourcePackage = ResourcePackage.eINSTANCE;
/**
* Eclass for resource Eobject
*/
private EClass resourceEObjectEClass = null;
/**
* current Epackage for the meta model corresponding to the current genmodel
*/
private EPackage currentEPackage = null;
/**
* Transform the genmodel sotred at the given URI to link it with Resource Meta model
*
* @param uri
* @throws URINotValidException
* @throws IOException
*/
public void transform(URI uri) throws URINotValidException, IOException {
if(uri == null) {
throw new URINotValidException("uri is null");
}
ResourceSet set = new ResourceSetImpl();
try {
Resource resource = set.getResource(uri, true);
if(resource != null) {
EObject e = resource.getContents().get(0);
if(e instanceof GenModel) {
GenModel genmodel = (GenModel)e;
Resource toSave = update(genmodel);
if(toSave != null) {
resource.save(Collections.EMPTY_MAP);
toSave.save(Collections.EMPTY_MAP);
}
} else {
throw new URINotValidException("uri " + uri.toString() + "doesn't reference a genmodel");
}
}
// we have to unload the resource to free the memory
for(Resource r : set.getResources()) {
if(r.isLoaded()) {
try {
r.unload();
} catch (Exception e) {
// to prevent unload exception
}
}
}
} catch (RuntimeException e) {
throw new URINotValidException("uri " + uri.toString() + "not valid");
}
}
/**
* update the genmodel to reference Resource Meta model
*
* @param genmodel
* @return true if the resource has to be saved
*/
private Resource update(GenModel genmodel) {
// does the genmodel already contain the resource ?
Resource result = null;
boolean found = false;
for(GenPackage p : genmodel.getUsedGenPackages()) {
found |= resourcePackage.equals(p.getEcorePackage());
}
if(!found) {
// we load the Resource GenModel
Resource resourceForResourceGenmodel = genmodel.eResource().getResourceSet().getResource(
uriForResourceGenModel, true);
if(resourceForResourceGenmodel != null) {
EObject root = resourceForResourceGenmodel.getContents().get(0);
if(root instanceof GenModel) {
GenModel model = (GenModel)root;
// Resource Genmodel is a used gen package for the current genmodel
genmodel.getUsedGenPackages().add(model.getGenPackages().get(0));
// load the eclass resource eobject
Resource resourceResource = genmodel.eResource().getResourceSet().getResource(
uriForEclassResourceEObject.trimFragment(), true);
if(resourceResource != null) {
// we get the ResourceEObject EClass
EObject resourceEObjectEobject = resourceResource.getEObject(uriForEclassResourceEObject
.fragment());
if(resourceEObjectEobject instanceof EClass) {
resourceEObjectEClass = (EClass)resourceEObjectEobject;
result = addResourceEobjectInheritance(genmodel);
}
}
}
}
}
// if not found we have to save
return result;
}
/**
* add the inheritance to each EObject
*
* @param genmodel
*/
private Resource addResourceEobjectInheritance(GenModel genmodel) {
// we resolve to have access to all the eobjects
EcoreUtil.resolveAll(genmodel.eResource().getResourceSet());
Resource result = null;
List<GenPackage> packages = genmodel.getGenPackages();
if(packages.size() > 0) {
GenPackage genPackage = packages.get(0);
currentEPackage = genPackage.getEcorePackage();
result = currentEPackage.eResource();
manageEPackage(currentEPackage);
}
return result;
}
/**
* Recursive method to browse EPackages
*
* @param currentEPackage2
*/
private void manageEPackage(EPackage currentEPackage2) {
for(EClassifier eclassifier : currentEPackage2.getEClassifiers()) {
if(eclassifier instanceof EClass) {
EClass eClass = (EClass)eclassifier;
manageEClass(eClass);
}
}
for(EPackage ePackage : currentEPackage2.getESubpackages()) {
manageEPackage(ePackage);
}
}
/**
* Recursive method to manage hierarchy tree
*
* @param eClass
*/
private void manageEClass(EClass eClass) {
if(eClass != resourceEObjectEClass) {
if(eClass.getESuperTypes().size() == 0) {
if(isACorrectEPackage(eClass.getEPackage())) {
eClass.getESuperTypes().add(resourceEObjectEClass);
}
} else {
boolean toAdd = true;
for(EClass eClass2 : eClass.getESuperTypes()) {
toAdd &= !isACorrectEPackage(eClass2.getEPackage());
manageEClass(eClass2);
}
if(toAdd) {
eClass.getESuperTypes().add(resourceEObjectEClass);
}
}
}
}
/**
* determine if the ePackage given in parameter is a children of the current Epackage
*
* @param ePackage
* @return
*/
private boolean isACorrectEPackage(EPackage ePackage) {
EPackage current = ePackage;
while(current != null && current != currentEPackage) {
current = current.getESuperPackage();
}
return current == currentEPackage;
}
}
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