Examples of ptolemy.kernel.Entity

ptolemy.kernel.Entity
An Entity is a vertex in a generalized graph. It is an aggregation of ports. The ports can be linked to relations. The relations thus represent connections between ports, and hence, connections between entities. To add a port to an entity, simply set its container to the entity. To remove it, set its container to null, or to some other entity.
Entities are intended for flat graphs. Derived classes support hierarchy (clustered graphs) by defining entities that aggregate other entities.
An Entity can contain any instance of Port. Derived classes may wish to constrain to a subclass of Port. To do this, subclasses should override the public method newPort() to create a port of the appropriate subclass, and the protected method _addPort() to throw an exception if its argument is a port that is not of the appropriate subclass.
An Entity is created within a workspace. If the workspace is not specified as a constructor argument, then the default workspace is used. The workspace is used to synchronize simultaneous accesses to a topology from multiple threads. The workspace is immutable (it cannot be changed during the lifetime of the Entity). @author John S. Davis II, Edward A. Lee @version $Id: Entity.java,v 1.125 2007/12/06 21:57:05 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (johnr) @see ptolemy.kernel.Port @see ptolemy.kernel.Relation

        if (transition == null) {
            throw new IllegalActionException(this,
                    "Action has no container transition.");
        }


        Entity fsm = (Entity) transition.getContainer();


        if (fsm == null) {
            throw new IllegalActionException(this, transition,
                    "Transition has no container.");
        }


        IOPort port = (IOPort) fsm.getPort(name);


        if (port == null) {
            // No port found.  Try for a variable.
            Attribute variable = fsm.getAttribute(name);


            if (variable == null) {
                // Try for a refinement variable.
                int period = name.indexOf(".");


                if (period > 0) {
                    String refinementName = name.substring(0, period);
                    String entryName = name.substring(period + 1);


                    // FIXME: Look in the container of the fsm???
                    // Below we look for an attribute only in the fsm
                    // itself.
                    Nameable fsmContainer = fsm.getContainer();


                    if (fsmContainer instanceof CompositeEntity) {
                        Entity refinement = ((CompositeEntity) fsmContainer)
                                .getEntity(refinementName);


                        if (refinement != null) {
                            Attribute entry = refinement
                                    .getAttribute(entryName);


                            if (entry instanceof Variable) {
                                return entry;
                            }

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            } else if (getName().equals(routeTo) || (hops == 0)) {
                // Change the color of the icon to green.
                _circle2.fillColor.setToken("{0.0, 1.0, 0.0, 1.0}");


                CompositeEntity container = (CompositeEntity) getContainer();
                Entity destNode = container.getEntity(destination);
                Locatable destLocation = (Locatable) destNode.getAttribute(
                        "_location", Locatable.class);
                Locatable myLocation = (Locatable) this.getAttribute(
                        "_location", Locatable.class);


                if ((destLocation == null) || (myLocation == null)) {
                    throw new IllegalActionException(
                            "Cannot determine location for node "
                                    + destNode.getName() + ".");
                }


                Iterator nodes = _connectedNodes.iterator();
                double minDistance = _distanceBetween(destLocation, myLocation);
                String to = " ";
                boolean multi = ((BooleanToken) doublePath.getToken())
                        .booleanValue();
                double nextMinDistance = _distanceBetween(destLocation,
                        myLocation);
                String to2 = " ";


                while (nodes.hasNext()) {
                    Entity node = (Entity) nodes.next();
                    Locatable location = (Locatable) node.getAttribute(
                            "_location", Locatable.class);


                    if (location == null) {
                        throw new IllegalActionException(
                                "Cannot determine location for node "
                                        + node.getName() + ".");
                    }


                    double d = _distanceBetween(destLocation, location);


                    if (multi) {
                        if (d < minDistance) {
                            nextMinDistance = minDistance;
                            to2 = to;
                            minDistance = d;
                            to = node.getName();
                        } else if (d < nextMinDistance) {
                            nextMinDistance = d;
                            to2 = node.getName();
                        }
                    } else {
                        if (d < minDistance) {
                            minDistance = d;
                            to = node.getName();
                        }
                    }
                }


                // Request refiring after a certain amount of time specified

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            List result = new LinkedList();
            CompositeEntity container = (CompositeEntity) getContainer();
            Iterator entities = container.entityList().iterator();


            while (entities.hasNext()) {
                Entity entity = (Entity) entities.next();
                Iterator ports = entity.portList().iterator();


                while (ports.hasNext()) {
                    Port port = (Port) ports.next();


                    if (port instanceof WirelessIOPort) {

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            List result = new LinkedList();
            CompositeEntity container = (CompositeEntity) getContainer();
            Iterator entities = container.entityList().iterator();


            while (entities.hasNext()) {
                Entity entity = (Entity) entities.next();
                Iterator ports = entity.portList().iterator();


                while (ports.hasNext()) {
                    Port port = (Port) ports.next();


                    if (port instanceof WirelessIOPort) {

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     *  @return The location of the port.
     *  @exception IllegalActionException If a valid location attribute cannot
     *   be found.
     */
    protected double[] _locationOf(IOPort port) throws IllegalActionException {
        Entity container = (Entity) port.getContainer();
        Locatable location = null;


        if (container == getContainer()) {
            location = (Locatable) port.getAttribute(LOCATION_ATTRIBUTE_NAME,
                    Locatable.class);
        } else {
            location = (Locatable) container.getAttribute(
                    LOCATION_ATTRIBUTE_NAME, Locatable.class);
        }


        if (location == null) {
            throw new IllegalActionException(

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            String theChannelName) throws IllegalActionException {
        List result = new LinkedList();
        Iterator entities = container.entityList().iterator();


        while (entities.hasNext()) {
            Entity entity = (Entity) entities.next();
            Iterator ports = entity.portList().iterator();


            while (ports.hasNext()) {
                Port port = (Port) ports.next();


                if (port instanceof WirelessIOPort) {

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     *  @exception IllegalActionException If a valid location attribute cannot
     *   be found.
     */
    public static double[] locationOf(IOPort port)
            throws IllegalActionException {
        Entity portContainer = (Entity) port.getContainer();
        Locatable location = null;


        //FIXME: What should I do here...
        //if (portContainer == container) {
        //    location = (Locatable)port.getAttribute(LOCATION_ATTRIBUTE_NAME,
        //            Locatable.class);
        //} else {
        location = (Locatable) portContainer.getAttribute(
                LOCATION_ATTRIBUTE_NAME, Locatable.class);


        //}
        if (location == null) {
            throw new IllegalActionException(

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            String theChannelName) throws IllegalActionException {
        List result = new LinkedList();
        Iterator entities = container.entityList().iterator();


        while (entities.hasNext()) {
            Entity entity = (Entity) entities.next();
            Iterator ports = entity.portList().iterator();


            while (ports.hasNext()) {
                Port port = (Port) ports.next();


                if (port instanceof WirelessIOPort) {

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            protected void _execute() throws KernelException {
                Iterator entities = entityToFiringsPerIteration.keySet()
                        .iterator();


                while (entities.hasNext()) {
                    Entity entity = (Entity) entities.next();
                    int firingCount = ((Integer) entityToFiringsPerIteration
                            .get(entity)).intValue();
                    DFUtilities.setOrCreate(entity, "firingsPerIteration",
                            firingCount);


                    if (_debugging) {
                        _debug("Adding firingsPerIteration parameter to "
                                + entity.getName() + " with value "
                                + firingCount);
                    }
                }
            }
        };

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            if (port.isOutput() && port instanceof WirelessIOPort) {
                // Found the port.
                foundOne = true;


                Entity container = (Entity) (port.getContainer());
                String channelName = ((WirelessIOPort) port).outsideChannel
                        .stringValue();
                CompositeEntity container2 = (CompositeEntity) container
                        .getContainer();


                if (container2 == null) {
                    throw new IllegalActionException(this,
                            "The port's container does not have a container.");
                }


                Entity channel = container2.getEntity(channelName);


                if (channel instanceof WirelessChannel) {
                    // Cache it here, so no need to do it again in wrapup().
                    _outputWirelessChannel = (WirelessChannel) channel;
                    _wirelessOutputPort = (WirelessIOPort) port;
                    ((WirelessChannel) channel).registerPropertyTransformer(
                            this, (WirelessIOPort) port);
                } else {
                    throw new IllegalActionException(this,
                            "The connected output port does not refer to a "
                                    + "valid channel.");
                }
            }
        }


        //register this property transformer for the connected wireless
        //input port. It assumes there is only one.
        Iterator connectedInputPorts = input.sourcePortList().iterator();


        while (connectedInputPorts.hasNext()) {
            //register this property transformer for the connected wireless
            //output port. It assumes there is only one.
            IOPort port = (IOPort) connectedInputPorts.next();


            if (port.isInput() && port instanceof WirelessIOPort) {
                // Found the port.
                foundOne = true;


                Entity container = (Entity) (port.getContainer());
                String channelName = ((WirelessIOPort) port).outsideChannel
                        .stringValue();
                CompositeEntity container2 = (CompositeEntity) container
                        .getContainer();


                if (container2 == null) {
                    throw new IllegalActionException(this,
                            "The port's container does not have a container.");
                }


                Entity channel = container2.getEntity(channelName);


                if (channel instanceof WirelessChannel) {
                    // Cache it here, so no need to do it again in wrapup().
                    _inputWirelessChannel = (WirelessChannel) channel;
                    _wirelessInputPort = (WirelessIOPort) port;

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