/*******************************************************************************
 * Copyright (c) 2014, 2018 Willink Transformations and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v2.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v20.html
 *
 * Contributors:
 *     R.Dvorak and others - QVTo debugger framework
 *     E.D.Willink - revised API for OCL debugger framework
 *******************************************************************************/
package org.eclipse.ocl.examples.debug.evaluator;

import java.util.Set;

import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.jdt.annotation.NonNull;
import org.eclipse.ocl.pivot.PivotPackage;
import org.eclipse.ocl.pivot.Type;
import org.eclipse.ocl.pivot.evaluation.AbstractModelManager;
import org.eclipse.ocl.pivot.internal.manager.MetamodelManagerInternal;
import org.eclipse.ocl.pivot.internal.utilities.EnvironmentFactoryInternal.EnvironmentFactoryInternalExtension;
import org.eclipse.ocl.pivot.utilities.ClassUtil;
import org.eclipse.ocl.pivot.utilities.ParserException;

/**
 * OCL Domain Manager is the class responsible for managing the OCL virtual
 * machine meta-models and models.
 * A OCL Domain Manager object encapsulates the domain information need to
 * modify the domains's models.
 */
public class OCLVMModelManager extends AbstractModelManager
{
	protected final @NonNull EnvironmentFactoryInternalExtension environmentFactory;
	/**
	 * The types upon which execution of the transformation may invoke allInstances().
	 */
	//	private @NonNull Set<Type> allInstancesTypes;

	/**
	 * Instantiates a new OCL Domain Manager. Responsible for creating new
	 * instances of the middle model and the middle model EFactory.
	 */
	public OCLVMModelManager(@NonNull MetamodelManagerInternal metamodelManager) {
		this.environmentFactory = (EnvironmentFactoryInternalExtension) metamodelManager.getEnvironmentFactory();
		//	    super(metamodelManager);
		//	    this.allInstancesTypes = transformationAnalysis.getAllInstancesTypes();
	}

	@Override
	public @NonNull Set<@NonNull EObject> get(org.eclipse.ocl.pivot.@NonNull Class type) {
		throw new UnsupportedOperationException();
	}

	/**
	 * Implemented by subclasses to determine whether the specified element
	 * is an instance of the specified class, according to the metamodel
	 * semantics implemented by the environment that created this extent map.
	 *
	 * @param requiredType the type
	 * @param eObject a potential run-time (M0) instance of that class
	 * @return <code>true</code> if this element is an instance of the given
	 * class; <code>false</code> otherwise
	 */
	protected boolean isInstance(@NonNull Type requiredType, @NonNull EObject eObject) {
		EClass eClass = eObject.eClass();
		EPackage ePackage = eClass.getEPackage();
		Type objectType = null;
		if (ePackage == PivotPackage.eINSTANCE) {
			String name = ClassUtil.nonNullEMF(eClass.getName());
			objectType = environmentFactory.getASClass(name);
		}
		else {
			try {
				objectType = environmentFactory.getASOf(Type.class,  eClass);
			} catch (ParserException e) {
				// FIXME				if (!generatedErrorMessage) {
				//					generatedErrorMessage = true;
				//					logger.error("Failed to load an '" + eClass.getName() + "'", e);
				//				}
			}
		}
		return (objectType != null) && objectType.conformsTo(environmentFactory.getStandardLibrary(), requiredType);
	}
}