examples/org.eclipse.ocl.examples.impactanalyzer/src/org/eclipse/ocl/examples/impactanalyzer/instanceScope/unusedEvaluation/PartialEcoreEnvironmentFactoryNoAllInstances.java

/*******************************************************************************
 * Copyright (c) 2009, 2011 SAP AG 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:
 *     SAP AG - initial API and implementation
 ******************************************************************************/
package org.eclipse.ocl.examples.impactanalyzer.instanceScope.unusedEvaluation;

import java.util.Map;
import java.util.Set;

import org.eclipse.emf.common.notify.Notification;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EClassifier;
import org.eclipse.emf.ecore.EEnumLiteral;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.EOperation;
import org.eclipse.emf.ecore.EPackage;
import org.eclipse.emf.ecore.EParameter;
import org.eclipse.emf.ecore.EStructuralFeature;
import org.eclipse.ocl.Environment;
import org.eclipse.ocl.EvaluationEnvironment;
import org.eclipse.ocl.EvaluationVisitor;
import org.eclipse.ocl.ecore.CallOperationAction;
import org.eclipse.ocl.ecore.Constraint;
import org.eclipse.ocl.ecore.OCLExpression;
import org.eclipse.ocl.ecore.SendSignalAction;
import org.eclipse.ocl.ecore.opposites.DefaultOppositeEndFinder;
import org.eclipse.ocl.ecore.opposites.OppositeEndFinder;
import org.eclipse.ocl.examples.impactanalyzer.deltaPropagation.PartialEcoreEnvironmentFactory;



/**
 * Uses {@link PartialEvaluationVisitorImplNoAllInstances} as evaluation visitor which throws a
 * {@link NoAllInstancesDuringEvaluationForUnusedCheck} exception in case <code>allInstances()</code>
 * is to be evaluated.
 * 
 * @author Axel Uhl (D043530)
 *
 */
public class PartialEcoreEnvironmentFactoryNoAllInstances extends PartialEcoreEnvironmentFactory {
    /**
     * Uses a {@link DefaultOppositeEndFinder} for querying hidden opposites
     */
    public PartialEcoreEnvironmentFactoryNoAllInstances() {
        super();
    }

    /**
     * Taking a {@link Notification} object such that an evaluation performed with the {@link EvaluationVisitor} returned by this
     * factory's {@link #createEvaluationVisitor(Environment, EvaluationEnvironment, Map)} operation will be based on the state
     * <em>before</em> the notification. For example, if the notification indicates the removal of a reference from an element
     * <tt>e1</tt> to an element <tt>e2</tt> across reference <tt>r</tt> then when during partial evaluation <tt>r</tt> is
     * traversed starting from <tt>e1</tt> then <tt>e2</tt> will show in the results although in the current version of the model
     * it would not.<p>
     * 
     * Uses a {@link DefaultOppositeEndFinder} for navigating hidden opposites.
     */
    public PartialEcoreEnvironmentFactoryNoAllInstances(Notification atPre) {
        super(atPre);
    }
    
    public PartialEcoreEnvironmentFactoryNoAllInstances(Notification atPre, OppositeEndFinder oppositeEndFinder) {
        super(atPre);
    }

    /**
     * Creates a visitor. The {@link #isEvaluationTracingEnabled()} result is ignored here. Unfortunately,
     * the <tt>TracingEvaluationVisitor</tt> class is not visible here. The {@link #sourceExpression}
     * and {@link #valueOfSourceExpression} are passed to the {@link PartialEvaluationVisitorImplNoAllInstances}
     * constructor and are nulled out before the constructor is called. As a consequence of this, subsequent
     * requests to this factory to create a visitor will result in visitors that don't treat the
     * source expression special anymore. This prevents incorrect use of the cached value during
     * recursions.
     */
    public PartialEvaluationVisitorImplNoAllInstances createEvaluationVisitor(
            Environment<EPackage, EClassifier, EOperation, EStructuralFeature, EEnumLiteral, EParameter, EObject, CallOperationAction, SendSignalAction, Constraint, EClass, EObject> env,
            EvaluationEnvironment<EClassifier, EOperation, EStructuralFeature, EClass, EObject> evalEnv,
            Map<? extends EClass, ? extends Set<? extends EObject>> extentMap) {
        OCLExpression localSourceExpression = getSourceExpression();
        setSourceExpression(null);
        Object localValueOfSourceExpression = getValueOfSourceExpression();
        setValueOfSourceExpression(null);
        return new PartialEvaluationVisitorImplNoAllInstances(env, evalEnv, extentMap, localSourceExpression, localValueOfSourceExpression, getAtPre());
    }

}