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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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/*
 * Copyright 2008 Lockheed Martin Corporation, except as stated in the file 
 * entitled Licensing-Information. 
 * All modifications copyright 2009-2011 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. 
 *
 * Contributors:
 *   MDS - initial API and implementation
 *
 */

package org.modeldriven.fuml.library.channel;

import org.modeldriven.fuml.library.common.Status;
import org.modeldriven.fuml.library.libraryclass.ImplementationObject;
import org.modeldriven.fuml.library.libraryclass.OperationExecution;

import fUML.Semantics.Classes.Kernel.BooleanValue;
import fUML.Semantics.Classes.Kernel.StringValue;

public abstract class ChannelObject extends ImplementationObject {
	
	// NOTE: Initial status is not set here because this.locus will not be
	// set when the object is first created.
	protected Status status = null;

    public abstract String getName();
    public abstract void open(Status errorStatus);
    public abstract void close(Status errorStatus);
    public abstract boolean isOpen();
    
    public Status getStatus() {
    	if (this.status == null) {
    		this.status = new Status(this.locus, "ChannelObject");
    	}
    	return this.status;
    }
    
    public void updateStatus(OperationExecution execution, Status status) {
        if (!status.isNormal()) {
        	execution.setParameterValue("errorStatus", status.getValue());
        }
        this.status = status;
    }

    public void execute(OperationExecution execution) {
        String name = execution.getOperationName();
        
        Status status = new Status(this.locus, "ChannelObject");

        if (name.equals("getName")) {
            StringValue nameValue = new StringValue();
            nameValue.value = this.getName();
            nameValue.type = this.locus.factory.getBuiltInType("String");
            execution.setReturnParameterValue(nameValue);
        } else if (name.equals("open")) {
            this.open(status);
            this.updateStatus(execution, status);
        } else if (name.equals("close")) {
            this.close(status);
            this.updateStatus(execution, status);
        } else if (name.equals("isOpen")) {
            BooleanValue isOpenValue = new BooleanValue();
            isOpenValue.value = this.isOpen();
            isOpenValue.type = this.locus.factory.getBuiltInType("Boolean");
            execution.setReturnParameterValue(isOpenValue);
        } else if (name.equals("getStatus")) {
        	Status result = this.getStatus();        	
            execution.setReturnParameterValue(result.getValue());
        }        
    }

} // ChannelObject