Examples of ptolemy.actor.IOPort

ptolemy.actor.IOPort
This class supports exchanging data between entities via message passing. It can serve as an input port, an output port, or both. If it is an input port, then it contains some number of receivers, which are responsible for receiving data from remote entities. If it is an output port, then it can send data to remote receivers.
Its receivers are created by a director. It must therefore be contained by an actor that has a director. If it is not, then any attempt to read data or list the receivers will trigger an exception.
If this port is at the boundary of an composite actor, then it can have both inside and outside links, with corresponding inside and outside receivers if it opaque. The inside links are to relations inside the opaque composite actor, whereas the outside links are to relations outside. If it is not specified, then a link is an outside link.
The port has a width, which by default is constrained to be either zero or one. The width is the sum of the widths of the linked relations. A port with a width greater than one behaves as a bus interface, so if the width is w, then the port can simultaneously handle w distinct input or output channels of data.
In general, an input port might have more than one receiver for each channel. This occurs particularly for transparent input ports, which treat the receivers of the ports linked on the inside as its own. This might also occur for opaque ports in some derived classes. Each receiver in the group is sent the same data. Thus, an input port in general will have w distinct groups of receivers, and can receive w distinct channels.
By default, the maximum width of the port is one, so only one channel is handled. A port that allows a width greater than one is called a multiport. Calling setMultiport() with a true argument converts the port to a multiport.
The width of the port is not set directly. It is the sum of the widths of the relations that the port is linked to on the outside. The sum of the widths of the relations linked on the inside can be more or less than the width. If it is more, then the excess inside relations will be treated as if they are unconnected. If it is less, then the excess outside relations will be treated as if they are unconnected.
An IOPort can only link to instances of IORelation. Derived classes may further constrain links to a subclass of IORelation. To do this, they should override the protected methods _checkLink() and _checkLiberalLink() to throw an exception if their arguments are not of the appropriate type. Similarly, an IOPort can only be contained by a class derived from ComponentEntity and implementing the Actor interface. Subclasses may further constrain the containers by overriding the protected method _checkContainer(). @author Edward A. Lee, Jie Liu, Neil Smyth, Lukito Muliadi @version $Id: IOPort.java,v 1.259.4.3 2008/03/25 23:11:08 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Red (neuendor)

        Schedule schedule = new Schedule();
        Actor lastActor = null;
        Actor actor = null;


        for (int i = 0; i < sort.length; i++) {
            IOPort ioPort = (IOPort) sort[i];


            // If this ioPort is input but has no connections,
            // we ignore it.
            if (ioPort.isInput() && (ioPort.numLinks() == 0)) {
                continue;
            }


            actor = (Actor) ioPort.getContainer();


            // If the actor is the container of this director (which
            // can occur if this director is not at the top level),
            // then skip this actor. The container of the director
            // should not be listed in the schedule.

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                .getDirector();


        for (Iterator portsIterator = connections.keySet().iterator(); portsIterator
                .hasNext();) {
            String portName = (String) portsIterator.next();
            IOPort port = (IOPort) ((ComponentEntity) actor).getPort(portName);
            DistributedTypedIORelation relation = null;


            if (port.isInput()) {
                Integer[][] integerReceivers = (Integer[][]) connections
                        .get(portName);


                if (VERBOSE) {
                    System.out.println("Receivers received for "
                            + portName
                            + "\n"
                            + DistributedUtilities
                                    .integersArrayToString(integerReceivers));
                }


                for (int i = 0; i < integerReceivers.length; i++) {
                    try {
                        relation = (DistributedTypedIORelation) compositeActor
                                .newRelation(portName + number);
                        number += 1;


                        if (VERBOSE) {
                            System.out.println("> for Port : " + portName
                                    + " created Relation: "
                                    + relation.getName());
                        }


                        port.link(relation);
                    } catch (NameDuplicationException e) {
                        KernelException.stackTraceToString(e);
                    } catch (IllegalActionException e) {
                        KernelException.stackTraceToString(e);
                    }
                }


                director.setListOfIds(DistributedUtilities
                        .convertIntegersToList(integerReceivers));


                try {
                    port.createReceivers();
                } catch (IllegalActionException e) {
                    KernelException.stackTraceToString(e);
                }


                if (VERBOSE) {
                    System.out.println("Receivers created for "
                            + portName
                            + "\n"
                            + DistributedUtilities.receiversArrayToString(port
                                    .getReceivers()));
                }
            }


            if (port.isOutput()) {
                try {
                    relation = (DistributedTypedIORelation) compositeActor
                            .newRelation(portName);


                    if (VERBOSE) {
                        System.out.println("> for Port : " + portName
                                + " created Relation: " + relation.getName());
                    }


                    port.link(relation);
                } catch (NameDuplicationException e) {
                    KernelException.stackTraceToString(e);
                } catch (IllegalActionException e) {
                    KernelException.stackTraceToString(e);
                }

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        // to the same external input port.  See
        // BaseSDFScheduler.setContainerRates.
        Iterator ports = model.portList().iterator();


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


            if (_debugging && VERBOSE) {
                _debug("External Port " + port.getName());
            }


            if (port.isInput() && port.isOutput()) {
                throw new NotSchedulableException(port,
                        "External port is both an input and an output, "
                                + "which is not allowed in SDF.");
            } else if (port.isInput()) {
                List sinks = port.insideSinkPortList();


                if (sinks.size() > 0) {
                    IOPort connectedPort = (IOPort) sinks.get(0);
                    Entity entity = (Entity) connectedPort.getContainer();
                    String name = connectedPort.getName(model);
                    String identifier = name.replaceAll("\\.", "::");


                    String sinkExpression;
                    Variable sinkRateVariable = DFUtilities.getRateVariable(
                            connectedPort, "tokenConsumptionRate");


                    if (sinkRateVariable == null) {
                        sinkExpression = "1";
                    } else {
                        sinkExpression = identifier + "::"
                                + sinkRateVariable.getName();
                    }


                    String expression = sinkExpression + " * "
                            + entity.getName() + "::firingsPerIteration";


                    DFUtilities.setExpressionIfNotDefined(port,
                            "tokenConsumptionRate", expression);


                    if (_debugging && VERBOSE) {
                        _debug("Setting tokenConsumptionRate to " + expression);
                    }
                }
            } else if (port.isOutput()) {
                List sources = port.insideSourcePortList();


                if (sources.size() > 0) {
                    IOPort connectedPort = (IOPort) sources.get(0);
                    Entity entity = (Entity) connectedPort.getContainer();
                    String name = connectedPort.getName(model);
                    String identifier = name.replaceAll("\\.", "::");
                    Variable sourceRateVariable = DFUtilities.getRateVariable(
                            connectedPort, "tokenProductionRate");
                    String sourceExpression;

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     */
    public void putArrayToAll(Token[] tokens, int numberOfTokens,
            Receiver[] receivers) throws NoRoomException,
            IllegalActionException, TerminateProcessException {
        if (numberOfTokens > tokens.length) {
            IOPort container = getContainer();
            throw new IllegalActionException(container,
                    "Not enough tokens supplied.");
        }


        for (int i = 0; i < numberOfTokens; i++) {

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                while (edges.hasNext()) {
                    Edge nextEdge = (Edge) edges.next();
                    PSDFEdgeWeight weight = (PSDFEdgeWeight) nextEdge
                            .getWeight();
                    IOPort sourcePort = weight.getSourcePort();
                    List relationList = sourcePort.linkedRelationList();


                    if (relationList.size() != 1) {
                        // FIXME: Need to generalize this?
                        throw new RuntimeException("Cannot handle relation "
                                + "lists that are not singletons.\n"

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                            if (receiver != null) {
                                receiver._putWaiting = theThread;
                                receiver._putReceivers = putReceivers;


                                IOPort port = receiver.getContainer();
                                if (isPutConditional) {
                                    receiver._putConditional = true;
                                    receiver._token = token == null ? null
                                            : port.convert(token);
                                } else {
                                    receiver._putConditional = false;
                                    try {
                                        token = tokenArray[i][j];
                                    } catch (Throwable e) {
                                    }
                                    receiver._token = token == null ? null
                                            : port.convert(token);
                                }


                                if (isSymmetric) {
                                    receiver._symmetricGetReceivers = getReceivers;
                                }

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                ports = ((Actor) actor).outputPortList().iterator();
            } else {
                ports = ((Actor) actor).inputPortList().iterator();
            }
            while (ports.hasNext()) {
                IOPort port = (IOPort) ports.next();
                Iterator connectedPorts = port.connectedPortList().iterator();
                while (connectedPorts.hasNext()) {
                    IOPort otherPort = (IOPort) connectedPorts.next();
                    // Skip ports with the same polarity (input or output)
                    // as the current port.
                    if (port.isInput() && !otherPort.isOutput()
                            || port.isOutput() && !otherPort.isInput()) {
                        continue;
                    }
                    NamedObj higherActor = otherPort.getContainer();
                    _addHighlights(higherActor, moml, visited, forward, clear);
                }
            }
        }
    }

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                    throw new IllegalActionException(this, ex,
                            "Expression invalid.");
                }


                if (nextDestination instanceof IOPort) {
                    IOPort destination = (IOPort) nextDestination;


                    try {
                        if (channel != null) {
                            if (token == null) {
                                destination.sendClear(channel.intValue());


                                if (_debugging) {
                                    _debug(getFullName() + " port: "
                                            + destination.getName()
                                            + " channel: " + channel.intValue()
                                            + ", Clear!");
                                }
                            } else {
                                destination.send(channel.intValue(), token);


                                if (_debugging) {
                                    _debug(getFullName() + " port: "
                                            + destination.getName()
                                            + " channel: " + channel.intValue()
                                            + ", token: " + token);
                                }
                            }
                        } else {
                            if (token == null) {
                                destination.broadcastClear();


                                if (_debugging) {
                                    _debug(getFullName() + " port: "
                                            + destination.getName()
                                            + " broadcast Clear!");
                                }
                            } else {
                                destination.broadcast(token);


                                if (_debugging) {
                                    _debug(getFullName() + " port: "
                                            + destination.getName()
                                            + " broadcast token: " + token);
                                }
                            }
                        }
                    } catch (NoRoomException ex) {
                        throw new IllegalActionException(this,
                                "Cannot complete action: " + ex.getMessage());
                    } catch (UnknownResultException ex) {
                        // Produce no output.
                    }
                } else if (nextDestination instanceof Variable) {
                    Variable destination = (Variable) nextDestination;


                    try {
                        //Token token = variable.getToken();
                        destination.setToken(token);


                        // Force all dependents to re-evaluate.
                        // This makes the parameters in the actors of
                        // the refinement take on new values immediately
                        // after the action is committed.
                        destination.validate();


                        if (_debugging) {
                            _debug(getFullName() + " variable: "
                                    + destination.getName() + ", value: "
                                    + token);
                        }
                    } catch (UnknownResultException ex) {
                        destination.setUnknown(true);
                    }
                } else {
                    throw new IllegalActionException(this,
                            "Destination is neither an IOPort nor a Variable: "
                                    + nextDestination.getFullName());

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        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;
                            }
                        }
                    }
                }


                throw new IllegalActionException(fsm, this,
                        "Cannot find port or variable with the name: " + name);
            } else {
                if (!(variable instanceof Variable)) {
                    throw new IllegalActionException(fsm, this,
                            "The attribute with name \"" + name
                                    + "\" is not an " + "instance of Variable.");
                }


                return variable;
            }
        } else {
            if (!port.isOutput()) {
                throw new IllegalActionException(fsm, this,
                        "The port is not an output port: " + name);
            }


            return port;

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        LinkedList newRelationList = new LinkedList();
        Iterator inputPorts = transition.inputPortList().iterator();


        while (inputPorts.hasNext()) {
            IOPort inPort = (IOPort) inputPorts.next();
            newRelationList.addAll(inPort.linkedRelationList());
        }


        LinkedList temporarySourcePortList = new LinkedList();


        while (newRelationList.size() > 0) {
            IORelation weights = (IORelation) newRelationList.getFirst();


            if (weights != null) {
                Iterator weightPorts = weights.linkedSourcePortList()
                        .iterator();


                while (weightPorts.hasNext()) {
                    IOPort weightPort = (IOPort) weightPorts.next();


                    if (!temporarySourcePortList.contains(weightPort)) {
                        temporarySourcePortList.add(weightPort);


                        Nameable weightPlace = weightPort.getContainer();


                        if (weightPlace instanceof PetriNetActor) {
                            if (weightPort.isOutput()) {
                                newRelationList.addAll(weightPort
                                        .insideRelationList());
                            } else if (weightPort.isInput()) {
                                newRelationList.addAll(weightPort
                                        .linkedRelationList());
                            }
                        }
                    }
                }

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