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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 2009-2017 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.Activities.IntermediateActivities;

import fUML.Debug;
import fUML.Syntax.Activities.IntermediateActivities.*;
import fUML.Semantics.Classes.Kernel.*;
import fUML.Semantics.CommonBehaviors.BasicBehaviors.*;

public class ActivityExecution extends
		fUML.Semantics.CommonBehaviors.BasicBehaviors.Execution {

	public fUML.Semantics.Activities.IntermediateActivities.ActivityNodeActivationGroup activationGroup = null;

	public void execute() {
		// Execute the activity for this execution by creating an activity node
		// activation group and activating all the activity nodes in the
		// activity.
		// When this is complete, copy the values on the tokens offered by
		// output parameter nodes to the corresponding output parameters.

		Activity activity = (Activity) (this.getTypes().getValue(0));

		Debug.println("[execute] Activity " + activity.name + "...");
		// Debug.println("[execute] context = " + this.context.objectId());
		Debug.println("[event] Execute activity=" + activity.name);

		this.activationGroup = new ActivityNodeActivationGroup();
		this.activationGroup.activityExecution = this;
		this.activationGroup.activate(activity.node, activity.edge);

		// Debug.println("[execute] Getting output parameter node activations...");

		ActivityParameterNodeActivationList outputActivations = this.activationGroup
				.getOutputParameterNodeActivations();

		// Debug.println("[execute] There are " + outputActivations.size() +
		// " output parameter node activations.");

		for (int i = 0; i < outputActivations.size(); i++) {
			ActivityParameterNodeActivation outputActivation = outputActivations
					.getValue(i);

			ParameterValue parameterValue = new ParameterValue();
			parameterValue.parameter = ((ActivityParameterNode) (outputActivation.node)).parameter;

			TokenList tokens = outputActivation.getTokens();
			for (int j = 0; j < tokens.size(); j++) {
				Token token = tokens.getValue(j);
				Value value = ((ObjectToken) token).value;
				if (value != null) {
					parameterValue.values.addValue(value);
					Debug.println("[event] Output activity=" + activity.name
							+ " parameter=" + parameterValue.parameter.name
							+ " value=" + value);
				}
			}

			this.setParameterValue(parameterValue);
		}

		Debug.println("[execute] Activity " + activity.name + " completed.");
	} // execute

	public fUML.Semantics.Classes.Kernel.Value copy() {
		// Create a new activity execution that is a copy of this execution.
		// [Note: This currently just returns a non-executing execution for the
		// same activity as this execution.]

		return super.copy();
	} // copy

	public fUML.Semantics.Classes.Kernel.Value new_() {
		// Create a new activity execution with empty properties.

		return new ActivityExecution();
	} // new_

	public void terminate() {
		// Terminate all node activations (which will ultimately result in the
		// activity execution completing).

		if (this.activationGroup != null) { 
			this.activationGroup.terminateAll();
		}
	} // terminate

} // ActivityExecution