Examples of ptolemy.kernel.Port

ptolemy.kernel.Port
A Port is the interface of an Entity to any number of Relations. Normally, a Port is contained by an Entity, although a port may exist with no container. The role of a port is to aggregate a set of links to relations. Thus, for example, to represent a directed graph, entities can be created with two ports, one for incoming arcs and one for outgoing arcs. More generally, the arcs to an entity may be divided into any number of subsets, with one port representing each subset.
A Port can link to any instance of Relation. Derived classes may wish to constrain links to a subclass of Relation. To do this, subclasses should override the protected method {@link #_checkLink(Relation)} tothrow an exception if its argument is a relation that is not of the appropriate subclass. Similarly, if a subclass wishes to constrain the containers of the port to be of a subclass of Entity, they should override the protected method {@link #_checkContainer(Entity)}. @author Mudit Goel, Edward A. Lee, Jie Liu @version $Id: Port.java,v 1.170 2006/09/21 15:40:03 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (cxh) @see Entity @see Relation

            // Have to copy _portList to avoid corrupting the iterator.
            List portListCopy = new LinkedList(portList());
            Iterator ports = portListCopy.iterator();


            while (ports.hasNext()) {
                Port port = (Port) ports.next();
                try {
                    MoMLChangeRequest request = new MoMLChangeRequest(this,
                            this, "<deletePort name=\"" + port.getName()
                                    + "\"/>");
                    request.setUndoable(true);
                    requestChange(request);
                } catch (Exception ex) {
                    // Ignore.

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        }


        Iterator ports = portList().iterator();


        while (ports.hasNext()) {
            Port port = (Port) ports.next();
            port.exportMoML(output, depth);
        }


        output.write(exportLinks(depth, null));
    }

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            Entity insideEntity = (Entity) entities.next();
            Iterator ports = result.portList().iterator();


            while (ports.hasNext()) {
                MirrorPort port = (MirrorPort) ports.next();
                Port insidePort = insideEntity.getPort(port.getName());


                if (insidePort instanceof MirrorPort) {
                    port.setAssociatedPort((MirrorPort) insidePort);
                }
            }

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     *  @exception NameDuplicationException If the container already has a port
     *  with this name.
     */
    public Port newPort(String name) throws NameDuplicationException {
        try {
            Port result = new MirrorPort(this, name);


            // NOTE: We would like prevent deletion via MoML
            // (or name changes, for that matter), but the following
            // also prevents making it an input, which makes
            // adding ports via the port dialog fail.

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                        String portName = castPort.getName();
                        Iterator entities = entityList().iterator();


                        if (entities.hasNext()) {
                            Entity insideEntity = (Entity) entities.next();
                            Port insidePort = insideEntity.getPort(portName);


                            if (insidePort == null) {
                                insidePort = insideEntity.newPort(portName);


                                if (insidePort instanceof IOPort) {
                                    IOPort castInsidePort = (IOPort) insidePort;
                                    castInsidePort.setInput(castPort.isInput());
                                    castInsidePort.setOutput(castPort
                                            .isOutput());
                                    castInsidePort.setMultiport(castPort
                                            .isMultiport());
                                }
                            }


                            if (insidePort instanceof MirrorPort) {
                                castPort
                                        .setAssociatedPort((MirrorPort) insidePort);
                            }


                            // Create a link only if it doesn't already exist.
                            List connectedPorts = insidePort
                                    .connectedPortList();


                            if (!connectedPorts.contains(castPort)) {
                                // There is no connection. Create one.
                                ComponentRelation newRelation = newRelation(uniqueName("relation"));
                                insidePort.link(newRelation);
                                castPort.link(newRelation);
                            }
                        }
                    } finally {
                        workspace().doneWriting();

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        }


        Iterator ports = portList().iterator();


        while (ports.hasNext()) {
            Port port = (Port) ports.next();
            port.exportMoML(output, depth);
        }


        Iterator entities = entityList().iterator();


        while (entities.hasNext()) {

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        // Have to copy the list to avoid a concurrent
        // modification exception.
        Iterator ports = (new LinkedList(portList())).iterator();


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


            try {
                _inRemoveEntity = true;
                port.setContainer(null);
            } catch (KernelException e) {
                throw new InternalErrorException(e);
            } finally {
                _inRemoveEntity = false;
            }

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        Iterator entities = entityList().iterator();


        while (entities.hasNext()) {
            Entity insideEntity = (Entity) entities.next();
            Port insidePort = insideEntity.getPort(port.getName());


            if (insidePort != null) {
                try {
                    insidePort.setContainer(null);
                } catch (KernelException ex) {
                    throw new InternalErrorException(ex);
                }
            }
        }

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                if (container != null) {
                    Nameable modal = container.getContainer();


                    if (modal instanceof MultiCompositeActor) {
                        Port port = ((MultiCompositeActor) modal)
                                .getPort(getName());


                        if (port instanceof IOPort) {
                            ((IOPort) port).moveDown();
                            success = true;

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                if (container != null) {
                    Nameable modal = container.getContainer();


                    if (modal instanceof MultiCompositeActor) {
                        Port port = ((MultiCompositeActor) modal)
                                .getPort(getName());


                        if (port instanceof IOPort) {
                            ((IOPort) port).moveToFirst();
                            success = true;

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