Examples of ptolemy.kernel.ComponentRelation

ptolemy.kernel.ComponentRelation
This class defines a relation supporting hierarchy (clustered graphs). Specifically, a method is added for defining a container and for performing deep traversals of a graph. Most importantly, however, instances of this class refuse to link to ports that are not instances of ComponentPort. Thus, this class ensures that ComponentPort instances are only connected to other ComponentPort instances.
Derived classes may wish to further constrain linked ports to a subclass of ComponentPort, or to disallow links under other circumstances, for example if the relation cannot support any more links. Such derived classes should override the protected method _checkPort() to throw an exception.
To link a ComponentPort to a ComponentRelation, use the link() or liberalLink() method in the ComponentPort class. To remove a link, use the unlink() method.
The container for instances of this class can only be instances of ComponentEntity. Derived classes may wish to further constrain the container to subclasses of ComponentEntity. To do this, they should override the protected _checkContainer() method. @author Edward A. Lee @version $Id: ComponentRelation.java,v 1.89 2005/10/24 19:09:11 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (johnr)

                    // real need to subclass this to remove it.
                    Iterator relations = ((CompositeEntity) composite)
                            .relationList().iterator();


                    while (relations.hasNext()) {
                        ComponentRelation relation = (ComponentRelation) relations
                                .next();
                        List vertexList = relation.attributeList(Vertex.class);


                        if (vertexList.size() != 0) {
                            // Add in all the vertexes.
                            Iterator vertexes = vertexList.iterator();


                            while (vertexes.hasNext()) {
                                Vertex v = (Vertex) vertexes.next();
                                nodes.add(v);
                            }
                        } else {
                            // See if we need to create a vertex.
                            // Count the linked ports.
                            int count = relation.linkedPortList().size();


                            if (count != 2) {
                                // A vertex is needed, so create one.
                                try {
                                    String name = relation.uniqueName("vertex");
                                    Vertex vertex = new Vertex(relation, name);
                                    nodes.add(vertex);


                                    // Have to manually handle propagation, since
                                    // the MoML parser is not involved.

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     *  @param connector The connector.
     *  @return The order index of the connection.
     */
    public int getOrderIndex(LinkManhattanConnector connector) {
        Link link = connector.getLink();
        ComponentRelation relation = link.getRelation();
        List relations;


        if (_inside) {
            relations = _port.insideRelationList();
        } else {

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            int index = -1;


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


                ComponentRelation relation = (ComponentRelation) relations
                        .next();


                if (relation == null) {
                    // Gap in the links.  The next link has to use an
                    // explicit index.

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                int index = -1;


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


                    ComponentRelation relation = (ComponentRelation) relations
                            .next();


                    if (relation == null) {
                        // Gap in the links.  The next link has to use an
                        // explicit index.

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                protected void _execute() throws Exception {
                    super._execute();
                    link.setHead(newArcHead);


                    if (relationNameToAdd != null) {
                        ComponentRelation relation = ((CompositeEntity) getPtolemyModel())
                                .getRelation(relationNameToAdd);
                        link.setRelation(relation);
                    }
                }
            };

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            // remove incoming transitions
            ComponentPort inPort = state.incomingPort;
            Iterator transitions = inPort.linkedRelationList().iterator();


            while (transitions.hasNext()) {
                ComponentRelation transition = (ComponentRelation) transitions
                        .next();
                transition.setContainer(null);
            }


            // remove outgoing transitions
            ComponentPort outPort = state.outgoingPort;
            transitions = outPort.linkedRelationList().iterator();


            while (transitions.hasNext()) {
                ComponentRelation transition = (ComponentRelation) transitions
                        .next();
                transition.setContainer(null);
            }


            // remove the state
            state.setContainer(null);
        } catch (IllegalActionException exception) {

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