Examples of ptolemy.kernel.util.StringAttribute

ptolemy.kernel.util.StringAttribute
An attribute that has a string value. Use setExpression() to define the value, as in for example
```
 attribute.setExpression("xxx"); 
```
The default value of the string contained by this attribute is the empty string.
By default, an instance of this class is fully visible in a user interface. The visibility is indicated to the user interface when the user interface calls the getVisibility() method of this class and the value Settable.FULL is returned to the userInterface.
Note that the string value within StringAttribute cannot reference other StringAttributes or Parameters, so if an actor has a public StringAttribute, then one cannot make the value of that attribute dependent on a value higher in the hierarchy. Usually, actors have public ptolemy.data.expr.Parameters instead of public StringAttributes so that the value can reference other parameters. The primary reason to use StringAttribute is if you want a string that will not be parsed and you do not want to type a leading a trailing double quote. @see Settable#FULL @author Edward A. Lee @version $Id: StringAttribute.java,v 1.57 2006/09/16 11:20:46 eal Exp $ @since Ptolemy II 1.0 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (cxh)

        } else {
            commands = new LinkedList();
            String applicationName = null;


            try {
                StringAttribute applicationNameAttribute = (StringAttribute) _configuration
                        .getAttribute("_applicationName", StringAttribute.class);


                if (applicationNameAttribute != null) {
                    applicationName = applicationNameAttribute.getExpression();
                }
            } catch (Throwable throwable) {
                // Ignore and use the default applicationName: "",
                // which means we look in doc.codeDoc.
            }

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            throws IllegalActionException, NameDuplicationException {
        super(container, name);


        // Don't use StringParameter here because variable
        // substitution would be strange.
        text = new StringAttribute(this, "text");
        text.setExpression("Double click to edit text.");


        TextStyle style = new TextStyle(text, "_style");
        style.height.setExpression("20");
        style.width.setExpression("80");

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        // conflict error messages and have to change this
        // to match.
        control.setExpression("true");
        ParameterPort port = control.getPort();
        // Put the control input on the bottom of the actor.
        StringAttribute controlCardinal = new StringAttribute(port, "_cardinal");
        controlCardinal.setExpression("SOUTH");


        // Create the default refinement.
        // NOTE: We do not use a TransitionRefinement because we don't
        // want the sibling input ports that come with output ports.
        _default = new Refinement(this, "default");

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        address.setTypeEquals(BaseType.INT);
        data = new TypedIOPort(this, "data", true, false);
        data.setMultiport(true);
        data.setTypeEquals(BaseType.DOUBLE);


        pathName = new StringAttribute(this, "pathName");
        pathName.setExpression("outfile.wav");


        sampleRate = new Parameter(this, "sampleRate", new IntToken(8000));
        sampleRate.setTypeEquals(BaseType.INT);

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    public AudioWriter(CompositeEntity container, String name)
            throws IllegalActionException, NameDuplicationException {
        super(container, name);
        input.setTypeEquals(BaseType.DOUBLE);


        pathName = new StringAttribute(this, "pathName");
        pathName.setExpression("outfile.wav");


        sampleRate = new Parameter(this, "sampleRate", new IntToken(8000));
        sampleRate.setTypeEquals(BaseType.INT);

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    public Comparator(CompositeEntity container, String name)
            throws NameDuplicationException, IllegalActionException {
        super(container, name);


        // Parameters
        comparison = new StringAttribute(this, "comparison");
        comparison.setExpression(">");


        tolerance = new Parameter(this, "tolerance");
        tolerance.setExpression("0.0");

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    public LogicFunction(CompositeEntity container, String name)
            throws NameDuplicationException, IllegalActionException {
        super(container, name);


        // Parameters
        function = new StringAttribute(this, "function");
        function.setExpression("and");
        _function = _AND;
        _negate = false;


        // Ports

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    public AudioReadBuffer(CompositeEntity container, String name)
            throws NameDuplicationException, IllegalActionException {
        super(container, name);
        output.setTypeEquals(BaseType.DOUBLE);
        output.setMultiport(true);
        sourceURL = new StringAttribute(this, "sourceURL");
        bufferLength = new Parameter(this, "bufferLength", new IntToken(8000));
        sourceURL.setExpression("file:///tmp/test.wav");
    }

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        control = new TypedIOPort(this, "control", true, false);
        control.setTypeEquals(BaseType.INT);


        // Put the control input on the bottom of the actor.
        StringAttribute controlCardinal = new StringAttribute(control,
                "_cardinal");
        controlCardinal.setExpression("SOUTH");
    }

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    public Expression(CompositeEntity container, String name)
            throws NameDuplicationException, IllegalActionException {
        super(container, name);


        output = new TypedIOPort(this, "output", false, true);
        expression = new StringAttribute(this, "expression");
        expression.setExpression("");


        Parameter hide = new Parameter(expression, "_hide");
        hide.setExpression("true");

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