fUML.Semantics.Actions.IntermediateActions.ClearStructuralFeatureActionActivation Maven / Gradle / Ivy

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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 ClearStructuralFeatureActionActivation
		extends
		fUML.Semantics.Actions.IntermediateActions.StructuralFeatureActionActivation {

	public void doAction() {
		// Get the value of the object input pin.
		// If the given feature is an association end, then
		// destroy all links that have the object input on the opposite end.
		// Otherwise, if the object input is a structured value, then
		// set the appropriate feature of the input value to be empty.

		ClearStructuralFeatureAction action = (ClearStructuralFeatureAction) (this.node);
		StructuralFeature feature = action.structuralFeature;
		Association association = this.getAssociation(feature);

		Value value = this.takeTokens(action.object).getValue(0);

		if (association != null) {
			LinkList links = this.getMatchingLinks(association, feature, value);
			for (int i = 0; i < links.size(); i++) {
				Link link = links.getValue(i);
				link.destroy();
			}
		} else if (value instanceof StructuredValue) {
			// If the value is a data value, then it must be copied before
			// any change is made.
			if (!(value instanceof Reference)) {
				value = value.copy();
			}

			((StructuredValue) value).setFeatureValue(action.structuralFeature,
					new ValueList(), 0);
		}

		if (action.result != null) {
			this.putToken(action.result, value);
		}
	} // doAction

} // ClearStructuralFeatureActionActivation