plugins/org.eclipse.emf.edapt.declaration/src/org/eclipse/emf/edapt/declaration/generalization/GeneralizeSuperType.java

package org.eclipse.emf.edapt.declaration.generalization;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.emf.edapt.declaration.EdaptConstraint;
import org.eclipse.emf.edapt.declaration.EdaptOperation;
import org.eclipse.emf.edapt.declaration.EdaptParameter;
import org.eclipse.emf.edapt.declaration.OperationImplementation;
import org.eclipse.emf.edapt.spi.migration.Instance;
import org.eclipse.emf.edapt.spi.migration.Metamodel;
import org.eclipse.emf.edapt.spi.migration.Model;

/**
 * {@description}
 *
 * @author herrmama
 * @author $Author$
 * @version $Rev$
 * @levd.rating YELLOW Hash: 46DEE928672A2762CB56899D0FE31BD0
 */
@EdaptOperation(identifier = "generalizeSuperType", label = "Generalize Super Type", description = "In the metamodel, the super type of a class is replaced by its super types. In the model, the values of the features that the class inherits from that super type (excluding its super types) are deleted.", breaking = true)
public class GeneralizeSuperType extends OperationImplementation {

	/** {@description} */
	@EdaptParameter(main = true, description = "The class of which the super type is replaced")
	public EClass eClass;

	/** {@description} */
	@EdaptParameter(description = "The super type to be replaced by its super types")
	public EClass superType;

	/** {@description} */
	@EdaptConstraint(restricts = "superType", description = "The super type to remove actually has to be a super type")
	public boolean checkSuperType(EClass superType) {
		return eClass.getESuperTypes().contains(superType);
	}

	/** {@inheritDoc} */
	@Override
	public void initialize(Metamodel metamodel) {
		if (!eClass.getESuperTypes().isEmpty()) {
			superType = eClass.getESuperTypes().get(0);
		}
	}

	/** {@inheritDoc} */
	@Override
	public void execute(Metamodel metamodel, Model model) {
		// metamodel adaptation
		eClass.getESuperTypes().remove(superType);
		eClass.getESuperTypes().addAll(superType.getESuperTypes());

		// model migration
		for (final Instance instance : model.getAllInstances(eClass)) {
			for (final EStructuralFeature feature : superType
				.getEStructuralFeatures()) {
				deleteFeatureValue(instance, feature);
			}
		}
	}
}