Examples of ptolemy.kernel.ComponentPort

ptolemy.kernel.ComponentPort
A port supporting hierarchy. A component port can have "inside" links as well as the usual "outside" links supported by the base class. That is, while the basic port has only links to relations that are on the exterior of its containing entity, this port can have links to relations on the interior. An inside link is a link to a relation that is contained by the container of the port.
A ComponentPort may be transparent or opaque. If it is transparent, then "deep" accesses of the topology see through the port. Methods that read the topology come in two versions, shallow and deep. The deep versions pass through transparent ports. This is done with a simple rule. If a transparent port is encountered from inside, then the traversal continues with its outside links. If it is encountered from outside, then the traversal continues with its inside links. A ComponentPort is opaque if its container is opaque. (its isOpaque() method returns true). Derived classes may use other strategies to specify whether a port is opaque.
Normally, links to a transparent port from the outside are to relations contained by the container of the container of the port. Links from the inside are to relations contained by the container of the port. That is, levels of the hierarchy are not crossed. For a few applications, links that cross levels of the hierarchy are needed. The links in these connections are created using the liberalLink() method. The link() method prohibits such links, throwing an exception if they are attempted (most applications will prohibit level-crossing connections by using only the link() method).
A ComponentPort can link to any instance of ComponentRelation. An attempt to link to an instance of Relation will trigger an exception. Derived classes may wish to further constrain links to a subclass of ComponentRelation. To do this, subclasses should override the protected methods _checkLink() and _checkLiberalLink() to throw an exception if their arguments are relations that are not of the appropriate subclass. Similarly, a ComponentPort can only be contained by a ComponentEntity, and an attempt to set the container to an instance of Entity will trigger an exception. If a subclass wishes to constrain the containers of the port to be of a subclass of ComponentEntity, they should override _checkContainer(). @author Edward A. Lee, Xiaojun Liu @version $Id: ComponentPort.java,v 1.105 2006/09/21 15:40:03 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (bart)

                NamedObj head = (NamedObj) getSemanticObject(linkHead);
                NamedObj tail = (NamedObj) getSemanticObject(linkTail);


                if (head instanceof ComponentPort
                        && tail instanceof ComponentPort) {
                    ComponentPort headPort = (ComponentPort) head;
                    ComponentPort tailPort = (ComponentPort) tail;
                    NamedObj ptolemyModel = getPtolemyModel();


                    // Linking two ports with a new relation.
                    String relationName = ptolemyModel.uniqueName("relation");


                    // If the context is not the entity that we're editing,
                    // then we need to set the context correctly.
                    if (ptolemyModel != container) {
                        String contextString = "<entity name=\""
                                + ptolemyModel.getName(container) + "\">\n";
                        moml.append(contextString);
                        failmoml.append(contextString);
                    }


                    // Note that we use no class so that we use the container's
                    // factory method when this gets parsed
                    moml.append("<relation name=\"" + relationName + "\"/>\n");
                    moml.append("<link port=\""
                            + headPort.getName(ptolemyModel) + "\" relation=\""
                            + relationName + "\"/>\n");
                    moml.append("<link port=\""
                            + tailPort.getName(ptolemyModel) + "\" relation=\""
                            + relationName + "\"/>\n");


                    // Record moml so that we can blow away these
                    // links in case we can't create them
                    failmoml.append("<unlink port=\""
                            + headPort.getName(ptolemyModel) + "\" relation=\""
                            + relationName + "\"/>\n");
                    failmoml.append("<unlink port=\""
                            + tailPort.getName(ptolemyModel) + "\" relation=\""
                            + relationName + "\"/>\n");
                    failmoml.append("<deleteRelation name=\"" + relationName
                            + "\"/>\n");


                    // close the context

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         *  @param node The node, which is assumed to be a port.
         *  @return The (presumably unique) icon contained in the port's
         *   container.
         */
        public Object getParent(Object node) {
            ComponentPort port = (ComponentPort) node;
            Entity entity = (Entity) port.getContainer();


            if (entity == null) {
                return null;
            }

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         *   the root of this graph model.
         *  @return An iterator of Link objects, all of which have their
         *   head as the given node.
         */
        public Iterator inEdges(Object node) {
            ComponentPort port = (ComponentPort) node;


            // Go through all the links, creating a list of
            // those we are connected to.
            List portLinkList = new LinkedList();
            Iterator links = _linkSet.iterator();

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         *   the root of this graph model.
         *  @return An iterator of Link objects, all of which have their
         *   tail as the given node.
         */
        public Iterator outEdges(Object node) {
            ComponentPort port = (ComponentPort) node;


            // Go through all the links, creating a list of
            // those we are connected to.
            List portLinkList = new LinkedList();
            Iterator links = _linkSet.iterator();

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         *  @param eventSource The source of the event that will be dispatched,
         *   e.g. the view that made this call.
         *  @param node The node.
         */
        public void removeNode(final Object eventSource, Object node) {
            ComponentPort port = (ComponentPort) node;
            NamedObj container = port.getContainer();
            ;


            // Delete the port.
            String moml = "<deletePort name=\"" + port.getName() + "\"/>\n";


            // Note: The source is NOT the graph model.
            MoMLChangeRequest request = new MoMLChangeRequest(this, container,
                    moml);
            request.setUndoable(true);

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         *  @param node The node.
         *  @return A valid MoML string.
         */
        public String getDeleteNodeMoML(Object node) {
            Locatable location = (Locatable) node;
            ComponentPort port = (ComponentPort) location.getContainer();
            StringBuffer moml = new StringBuffer();
            moml.append("<deletePort name=\"" + port.getName() + "\"/>\n");
            return moml.toString();
        }

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         *   e.g. the view that made this call.
         *  @param node The node.
         */
        public void removeNode(final Object eventSource, Object node) {
            Locatable location = (Locatable) node;
            ComponentPort port = (ComponentPort) location.getContainer();
            NamedObj container = port.getContainer();
            ;


            StringBuffer moml = new StringBuffer();
            moml.append("<deletePort name=\"" + port.getName(container)
                    + "\"/>\n");


            // Note: The source is NOT the graph model.
            MoMLChangeRequest request = new MoMLChangeRequest(this, container,
                    moml.toString());

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                    // The node is actually the location contained by the port.
                    // If the port does not contain a location, then create one.
                    Iterator ports = ((Entity) composite).portList().iterator();


                    while (ports.hasNext()) {
                        ComponentPort port = (ComponentPort) ports.next();
                        nodes.add(_getLocation(port));
                    }
                }


                if (composite instanceof CompositeEntity) {

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    private static void _links(JimpleBody body, CompositeActor composite) {
        // To get the ordering right,
        // we read the links from the ports, not from the relations.
        // First, produce the inside links on contained ports.
        for (Iterator ports = composite.portList().iterator(); ports.hasNext();) {
            ComponentPort port = (ComponentPort) ports.next();
            Iterator relations = port.insideRelationList().iterator();
            int index = -1;


            while (relations.hasNext()) {
                index++;

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        for (Iterator entities = composite.deepEntityList().iterator(); entities
                .hasNext();) {
            ComponentEntity entity = (ComponentEntity) entities.next();


            for (Iterator ports = entity.portList().iterator(); ports.hasNext();) {
                ComponentPort port = (ComponentPort) ports.next();


                Local portLocal;


                // If we already have a local reference to the port
                if (_portLocalMap.keySet().contains(port)) {
                    // then just get the reference.
                    portLocal = (Local) _portLocalMap.get(port);
                } else {
                    throw new RuntimeException("Found a port: " + port
                            + " that does not have a local variable!");
                }


                Iterator relations = port.linkedRelationList().iterator();
                int index = -1;


                while (relations.hasNext()) {
                    index++;

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