Examples of ptolemy.data.Token

ptolemy.data.Token
Token is the base class for data capsules. Tokens are immutable, meaning that their value cannot change after construction. They have a set of polymorphic methods providing a set of basic arithmetic and logical operations. Generally, derived classes should override the methods to implement type specific operations that make sense for a given type. For operations that are non-sensical for a given type, such as division of matrices, the implementation of this base class can be used, which simply throws an exception.
Generally, it is painful to implement both the operation and operationReverse methods of this class. It is also painful to implement tokens that are automatically converted to other tokens in a consistent fashion. As such, there are several subclasses of this class that implement these methods and provide a somewhat nicer abstraction. The ScalarToken derived class is useful for many types that are losslessly convertible to other types and may be associated with units, such as IntToken. The MatrixToken derived class is useful for implementing matrices of ScalarTokens, such as IntMatrixToken. The AbstractNotConvertible derived class is useful for implementing tokens that are not losslessly convertible to a token in implemented in another class, such as ArrayToken. Lastly, AbstractConvertibleToken is useful for implementing tokens that are losslessly convertible to a token in another class, but don't have units, such as BooleanToken.
Instances of this base class *should not* be used to represent pure events, i.e., to indicate that an event is present. To represent pure events, it is better to use the EventToken class. The reasoning is that the type BaseType.GENERAL is reserved to represent types which the type system cannot represent exactly. Using the EventToken class, and the type BaseType.EVENT allows typesafe use of pure events.
Nil, null or missing tokens are common in analytical systems like R and SAS where they are used to handle sparsely populated data sources. This class has support for such tokens, see {@link #NIL} for details. @author Neil Smyth, Yuhong Xiong, Edward A. Lee, Christopher Brooks,Steve Neuendorffer @version $Id: Token.java,v 1.142 2007/12/07 06:31:37 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Yellow (cxh) @Pt.AcceptedRating Red (cxh) nil token code @see ScalarToken @see AbstractConvertibleToken @see AbstractNotConvertibleToken @see MatrixToken

            RendezvousReceiver next = (RendezvousReceiver) zeroInDegreeIterator
                    .next();
            zeroInDegreeIterator.remove();


            if (next._symmetricPutReceivers != null) {
                Token token = next._token;
                Receiver[][] putReceivers = next._symmetricPutReceivers;


                // Delete the out-edges.
                if (next._getConditional) {
                    for (int i = 0; i < putReceivers.length; i++) {

View Full Code Here


        if (input.hasToken(0)) {
            if (_queue.size() < c) {
                _queue.add(input.get(0));
            } else {
                Token token = input.get(0);
                dropped.broadcast(token);
            }
        } else {
            output.broadcast((Token) _queue.removeFirst());
        }

View Full Code Here

                NamedObj nextDestination = (NamedObj) destinations.next();


                // Need to get the next channel even if it's not used.
                Integer channel = (Integer) channels.next();
                ASTPtRootNode parseTree = (ASTPtRootNode) parseTrees.next();
                Token token;


                // In MultirateFSMDirector, the initial transition from
                // the initial state is taken during preinitialize() if
                // the initial state does not have a refinement, therefore
                // _scope need to be initialized here. -- Gang

View Full Code Here

     */
    public void fire() throws IllegalActionException {
        super.fire();


        if (payload.hasToken(0)) {
            Token inputValue = payload.get(0);


            if (_debugging) {
                _debug("Input data received: " + inputValue.toString());
            }


            if (properties.hasToken(0)) {
                Token propertiesValue = properties.get(0);


                // The following will throw an exception if the value is
                // not a RecordToken.
                output.outsideTransmitProperties.setToken(propertiesValue);
            } else {

View Full Code Here

            throws IllegalActionException {
        double range = Double.POSITIVE_INFINITY;
        boolean rangeIsSet = false;


        if (properties != null) {
            Token field = properties.get("range");


            if (field instanceof ScalarToken) {
                // NOTE: This may throw a NotConvertibleException, if,
                // example, a Complex or a Long is given.
                range = ((ScalarToken) field).doubleValue();
                rangeIsSet = true;
            }
        }


        if (!rangeIsSet) {
            // Type constraints in the constructor make the casts safe.
            RecordToken defaultPropertiesValue = (RecordToken) defaultProperties
                    .getToken();


            // Type of the field must be convertible to double, but
            // need not actually be a double.
            ScalarToken field = (ScalarToken) defaultPropertiesValue
                    .get("range");
            range = field.doubleValue();
        }


        boolean result = (_distanceBetween(source, destination) <= range);


        if (result) {

View Full Code Here


                double timeValue = getDirector().getModelTime()
                        .getDoubleValue();
                Token[] values = { new ArrayToken(locationArray),
                        new DoubleToken(timeValue), new IntToken(0) };
                Token result = new RecordToken(labels, values);


                output.send(0, result);
            } else {
                // It is the pursuer. Send its parent info to the pursuer.
                if (_timeValue > 0.0) {
                    String[] labels = { "location", "time", "depth" };


                    Token[] values = { new ArrayToken(_parentLocation),
                            new DoubleToken(_timeValue),
                            new IntToken(_parentDepth) };
                    Token result = new RecordToken(labels, values);


                    output.send(0, result);
                }
            }
        }

View Full Code Here


        if (temporaryAttribute == null) {
            return 1;
        } else if (temporaryAttribute instanceof Variable) {
            Variable weightAttribute = (Variable) temporaryAttribute;
            Token weightToken = weightAttribute.getToken();


            if (weightToken instanceof ScalarToken) {
                ScalarToken weightScalarToken = (ScalarToken) weightToken;
                return weightScalarToken.intValue();
            }

View Full Code Here

     *   to this container.
     */
    public void attributeChanged(Attribute attribute)
            throws IllegalActionException {
        if (attribute == defaultProperties) {
            Token value = defaultProperties.getToken();


            if ((value != null) && !(value instanceof RecordToken)) {
                throw new IllegalActionException(this,
                        "Expected a record for defaultProperties but got: "
                                + value);

View Full Code Here

     */
    public RecordToken transformProperties(RecordToken properties,
            WirelessIOPort source, WirelessIOPort destination)
            throws IllegalActionException {
        RecordToken result = properties;
        Token defaultPropertiesValue = defaultProperties.getToken();


        if (defaultPropertiesValue instanceof RecordToken) {
            if (properties != null) {
                result = RecordToken.merge(properties,
                        (RecordToken) defaultPropertiesValue);

View Full Code Here


        if (token != null) {
            if (receiver.hasRoom()) {
                WirelessIOPort destination = (WirelessIOPort) receiver
                        .getContainer();
                Token newToken = destination.convert(token);


                // Transform the properties.
                Token transformedProperties = transformProperties(properties,
                        sender, destination);
                receiver.put(newToken, transformedProperties);
                // Notify any channel listeners after the transmission occurs.
                channelNotify(properties, token, sender, destination);
            }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of ptolemy.data.Token

ptolemy.actor.Director

ptolemy.actor.gt.GraphAnalyzer

ptolemy.actor.gt.GraphMatcher

ptolemy.actor.gt.GraphTransformer

ptolemy.actor.gt.GTParameter$Evaluator

ptolemy.actor.gt.GTParameter$Scope

ptolemy.actor.gt.ingredients.criteria.AttributeCriterion

ptolemy.actor.gt.ingredients.operations.AttributeOperation

ptolemy.actor.gt.NamedObjToken

ptolemy.actor.gui.ExpressionShellTableau

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.