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)

     */
    public JAIMedianFilter(CompositeEntity container, String name)
            throws IllegalActionException, NameDuplicationException {
        super(container, name);


        shape = new StringAttribute(this, "shape");
        shape.setExpression("Square");
        _shape = MedianFilterDescriptor.MEDIAN_MASK_SQUARE;


        size = new Parameter(this, "size", new IntToken(3));
    }

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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.
        _default = newRefinement("default");


        // Create the director.

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                if (_columnNames.contains(ColumnNames.COL_DIRECTION)) {
                    // Look for a change in direction
                    String _direction = null;
                    String direction = (String) portInfo
                            .get(ColumnNames.COL_DIRECTION);
                    StringAttribute _cardinal = (StringAttribute) actualPort
                            .getAttribute("_cardinal");


                    if (_cardinal != null) {
                        _direction = _cardinal.getExpression().toUpperCase();
                    }


                    if (((_direction == null) && !direction.equals("DEFAULT"))
                            || ((_direction != null) && (!direction
                                    .equals(_direction)))) {

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


        input.setTypeEquals(BaseType.BOOLEAN);


        message = new StringAttribute(this, "message");
        message.setExpression("A model error.");
    }

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                    portInfo.put(ColumnNames.COL_NAME, p.getName());
                }


                if (_columnNames.contains(ColumnNames.COL_DIRECTION)) {
                    String _direction;
                    StringAttribute _cardinal = (StringAttribute) (p
                            .getAttribute("_cardinal"));


                    if (_cardinal != null) {
                        _direction = _cardinal.getExpression().toUpperCase();
                    } else {
                        _direction = "DEFAULT";
                    }


                    portInfo.put(ColumnNames.COL_DIRECTION, _direction);

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        suppressBlankLines = new Parameter(this, "suppressBlankLines");
        suppressBlankLines.setTypeEquals(BaseType.BOOLEAN);
        suppressBlankLines.setToken(BooleanToken.FALSE);


        title = new StringAttribute(this, "title");
        title.setExpression("");


        _attachText("_iconDescription", "<svg>\n"
                + "<rect x=\"-20\" y=\"-15\" " + "width=\"40\" height=\"30\" "
                + "style=\"fill:lightGrey\"/>\n" + "<rect x=\"-15\" y=\"-10\" "

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                                    tokenField.makeRef()), tokenLocal));
                    units.add(target);
                }
            }


            StringAttribute expressionAttribute = (StringAttribute) entity
                    .getAttribute("expression");
            String expression = expressionAttribute.getExpression();


            Local local = DataUtilities.generateExpressionCode(entity,
                    entityInstanceClass, expression, nameToField, nameToType,
                    body);

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        output = new TypedIOPort(this, "output", false, true);
        output.setTypeAtLeast(trueInput);
        output.setTypeAtLeast(falseInput);


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


        /** Make the icon show T, F, and C for trueInput, falseInput
         *  and control.
         */
        _attachText("_iconDescription", "<svg>\n"

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        confirmOverwrite = new Parameter(this, "confirmOverwrite");
        confirmOverwrite.setTypeEquals(BaseType.BOOLEAN);
        confirmOverwrite.setToken(BooleanToken.TRUE);


        fileType = new StringAttribute(this, "fileType");
        fileType.setExpression("QUICKTIME");
        _fileType = _QUICKTIME;
    }

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     */
    public VideoCamera(CompositeEntity container, String name)
            throws IllegalActionException, NameDuplicationException {
        super(container, name);


        formatName = new StringAttribute(this, "formatName");
        formatName.setExpression("RGB");


        deviceNumber = new Parameter(this, "deviceNumber", new IntToken(0));


        // FIXME: output should perhaps be named "video"?

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