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This open source software is a reference implementation, consisting of software and related files, for the OMG specification called the Semantics of a Foundational Subset for Executable UML Models (fUML). The reference implementation is intended to implement the execution semantics of UML activity models, accepting an XMI file from a conformant UML model as its input and providing an execution trace of the selected activity model(s) as its output. The core execution engine, which is directly generated from the normative syntactic and semantic models for fUML, may also be used as a library implementation of fUML in other software.

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/*
 * Initial version copyright 2008 Lockheed Martin Corporation, except  
 * as stated in the file entitled Licensing-Information. 
 * 
 * All modifications copyright 2009-2012 Data Access Technologies, Inc.
 *
 * Licensed under the Academic Free License version 3.0 
 * (http://www.opensource.org/licenses/afl-3.0.php), except as stated 
 * in the file entitled Licensing-Information. 
 */

package fUML.Semantics.Actions.IntermediateActions;

import fUML.Debug;
import UMLPrimitiveTypes.*;

import fUML.Syntax.*;
import fUML.Syntax.Classes.Kernel.*;
import fUML.Syntax.CommonBehaviors.BasicBehaviors.*;
import fUML.Syntax.CommonBehaviors.Communications.*;
import fUML.Syntax.Activities.IntermediateActivities.*;
import fUML.Syntax.Actions.BasicActions.*;
import fUML.Syntax.Actions.IntermediateActions.*;

import fUML.Semantics.*;
import fUML.Semantics.Classes.Kernel.*;
import fUML.Semantics.CommonBehaviors.BasicBehaviors.*;
import fUML.Semantics.Activities.IntermediateActivities.*;
import fUML.Semantics.Actions.BasicActions.*;
import fUML.Semantics.Loci.*;

public class DestroyObjectActionActivation extends
		fUML.Semantics.Actions.BasicActions.ActionActivation {

	public void doAction() {
		// Get the value on the target input pin.
		// If the value is not a reference, then the action has no effect.
		// Otherwise, do the following.
		// If isDestroyLinks is true, destroy all links in which the referent
		// participates.
		// If isDestroyOwnedObjects is true, destroy all objects owned by the
		// referent via composition links.
		// Destroy the referent object.

		DestroyObjectAction action = (DestroyObjectAction) (this.node);
		Value value = this.takeTokens(action.target).getValue(0);

		this.destroyObject(value, action.isDestroyLinks,
				action.isDestroyOwnedObjects);

	} // doAction

	public void destroyObject(fUML.Semantics.Classes.Kernel.Value value,
			boolean isDestroyLinks, boolean isDestroyOwnedObjects) {
		// If the given value is a reference, then destroy the referenced
		// object, per the given destroy action attribute values.

		// Debug.println("[destroyObject] object = " + value.objectId());

		if (value instanceof Reference) {
			Reference reference = (Reference) value;

			if (isDestroyLinks | isDestroyOwnedObjects) {
				Debug.println("[destroyObject] Destroying links...");
				ExtensionalValueList extensionalValues = this
						.getExecutionLocus().extensionalValues;
				for (int i = 0; i < extensionalValues.size(); i++) {
					ExtensionalValue extensionalValue = extensionalValues
							.getValue(i);
					if (extensionalValue instanceof Link) {
						Link link = (Link) extensionalValue;
						if (this.valueParticipatesInLink(reference, link)) {
							if (isDestroyLinks
									| this.objectIsComposite(reference, link)) {
								// Debug.println("[destroyObject] Destroying link "
								// + link.objectId());
								link.destroy();
							}
						}
					}
				}
			}

			if (isDestroyOwnedObjects) {
				Debug.println("[destroyObject] Destroying owned objects...");
				FeatureValueList objectFeatureValues = reference
						.getFeatureValues();
				for (int i = 0; i < objectFeatureValues.size(); i++) {
					FeatureValue featureValue = objectFeatureValues.getValue(i);
					if (((Property) featureValue.feature).aggregation == AggregationKind.composite) {
						ValueList values = featureValue.values;
						for (int j = 0; j < values.size(); j++) {
							Value ownedValue = values.getValue(j);
							this.destroyObject(ownedValue, isDestroyLinks,
									isDestroyOwnedObjects);
						}
					}
				}
			}

			reference.destroy();
		}
	} // destroyObject

	public boolean objectIsComposite(
			fUML.Semantics.Classes.Kernel.Reference reference,
			fUML.Semantics.Classes.Kernel.Link link) {
		// Test whether the given reference participates in the given link as a
		// composite.

		FeatureValueList linkFeatureValues = link.getFeatureValues();

		boolean isComposite = false;
		int i = 1;
		while (!isComposite & i <= linkFeatureValues.size()) {
			FeatureValue featureValue = linkFeatureValues.getValue(i - 1);
			if (!featureValue.values.getValue(0).equals(reference)
					& ((Property) featureValue.feature).aggregation == AggregationKind.composite) {
				isComposite = true;
			}
			i = i + 1;
		}

		return isComposite;

	} // objectIsComposite

} // DestroyObjectActionActivation