Examples of ptolemy.moml.MoMLChangeRequest

ptolemy.moml.MoMLChangeRequest
A mutation request specified in MoML. This class provides the preferred mechanism for implementing mutations on a model while it is executing. To use it, create an instance of this class, specifying MoML code as an argument to the constructor. Then queue the instance of this class with a composite entity by calling its requestChange() method.
If a context is given to the constructor, then the MoML will be executed in that context. If that context has other objects that defer their MoML definitions to it (i.e., it is a class definition and there are instances of the class), then the MoML will also be executed in the context of those objects that defer to it. Thus, the change to a class will propagate to instances. If the context is (deeply) contained by another object that has objects that defer their MoML definitions to it, then the changes are also propagated to those objects. Thus, even when class definitions are nested within class definitions, a change within a class definition will propagate to all instances of the class(es).
The parser used to implement the change will be the parser contained by a ParserAttribute of the top-level element of the context. If no context is given, or there is no ParserAttribute in its top level, then a new parser is created, and a new ParserAttribute is placed in the top level.
Note that if a context is specified that is above a class definition, and a change within the class definition is made by referencing the contents of the class definition using dotted names, then the change will not propagate. Thus, changes should be made in the most specific context (lowest level in the hierarchy) possible. @author Edward A. Lee @version $Id: MoMLChangeRequest.java,v 1.71 2006/02/27 22:24:53 cxh Exp $ @since Ptolemy II 1.0 @Pt.ProposedRating Yellow (eal) @Pt.AcceptedRating Red (neuendor)

            NamedObj actor = getTarget();
            StringBuffer moml = new StringBuffer("<group>");
            HashSet<NamedObj> visited = new HashSet<NamedObj>();
            _addHighlights(actor, moml, visited, _forward, _clear);
            moml.append("</group>");
            actor.requestChange(new MoMLChangeRequest(this, actor
                    .getContainer(), moml.toString()));
        }

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                // MoML definition, or the immediate parent if there is none.
                NamedObj parent = castAttribute.getContainer();
                String moml = "<property name=\"" + castAttribute.getName()
                        + "\" value=\""
                        + StringUtilities.escapeForXML(stringValue) + "\"/>";
                request = new MoMLChangeRequest(this, // originator
                        parent, // context
                        moml, // MoML code
                        null) { // base
                    protected void _execute() throws Exception {
                        synchronized (PtolemyQuery.this) {

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            if (attribute instanceof Settable) {
                // Use a MoMLChangeRequest so that visual rendition (if
                // any) is updated and listeners are notified.
                String moml = "<property name=\"" + name + "\" value=\""
                        + value + "\"/>";
                MoMLChangeRequest request = new MoMLChangeRequest(this, model,
                        moml);
                model.requestChange(request);
            } else {
                attribute = getAttribute(name);


                if (attribute instanceof Settable) {
                    // Use a MoMLChangeRequest so that visual rendition (if
                    // any) is updated and listeners are notified.
                    String moml = "<property name=\"" + name + "\" value=\""
                            + value + "\"/>";
                    MoMLChangeRequest request = new MoMLChangeRequest(this,
                            this, moml);
                    model.requestChange(request);
                }
                attribute = getAttribute(name);
            }


            if (model instanceof CompositeActor) {
                ptolemy.actor.Director director = ((CompositeActor) model)
                        .getDirector();


                if (director != null) {
                    attribute = director.getAttribute(name);


                    if (attribute instanceof Settable) {


                        // Use a MoMLChangeRequest so that
                        // visual rendition (if any) is
                        // updated and listeners are notified.
                        String moml = "<property name=\"" + name
                                + "\" value=\"" + value + "\"/>";
                        MoMLChangeRequest request = new MoMLChangeRequest(this,
                                director, moml);
                        director.requestChange(request);
                    }
                }
            }

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                // If there are changes, then issue a change request.
                // Use a MoMLChangeRequest so undo works... I.e., you can undo a cancel
                // of a previous change.
                if (hasChanges) {
                    MoMLChangeRequest request = new MoMLChangeRequest(this, // originator
                            _object, // context
                            buffer.toString(), // MoML code
                            null); // base
                    _object.requestChange(request);
                }

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                // If there are changes, then issue a change request.
                // Use a MoMLChangeRequest so undo works... I.e., you can undo a cancel
                // of a previous change.
                if (parametersReset.size() > 0) {
                    MoMLChangeRequest request = new MoMLChangeRequest(this, // originator
                            _object, // context
                            buffer.toString(), // MoML code
                            null) { // base
                        protected void _execute() throws Exception {
                            super._execute();

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                                + "\"" + entity.getName() + "\".");
            }


            entity.exportMoML(buffer, 1);


            ChangeRequest request = new MoMLChangeRequest(entity, library,
                    buffer.toString());
            library.requestChange(request);
        } catch (IOException ex) {
            // Ignore.
        } catch (KernelException ex) {

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                        // Use a MoMLChangeRequest so that visual rendition (if
                        // any) is updated and listeners are notified.
                        String moml = "<property name=\"" + name
                                + "\" value=\"" + value + "\"/>";
                        MoMLChangeRequest request = new MoMLChangeRequest(this,
                                model, moml);
                        model.requestChange(request);


                        /* Formerly (before the change request):
                         ((Settable)attribute).setExpression(value);
                         if (attribute instanceof Variable) {
                         // Force evaluation so that listeners are notified.
                         ((Variable)attribute).getToken();
                         }
                         */
                    }


                    if (model instanceof CompositeActor) {
                        Director director = ((CompositeActor) model)
                                .getDirector();


                        if (director != null) {
                            attribute = director.getAttribute(name);


                            if (attribute instanceof Settable) {
                                match = true;


                                // Use a MoMLChangeRequest so that visual rendition (if
                                // any) is updated and listeners are notified.
                                String moml = "<property name=\"" + name
                                        + "\" value=\"" + value + "\"/>";
                                MoMLChangeRequest request = new MoMLChangeRequest(
                                        this, director, moml);
                                director.requestChange(request);


                                /* Formerly (before change request):
                                 ((Settable)attribute).setExpression(value);

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                        + state.getName(container)
                        + "\"><property name=\"refinementName\" value=\""
                        + currentRefinements + "\"/></entity></group>";
            }


            MoMLChangeRequest change = new MoMLChangeRequest(this, container,
                    moml) {
                protected void _execute() throws Exception {
                    super._execute();


                    // Mirror the ports of the container in the refinement.

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                    NamedObj parent = object.getContainer();
                    String moml = "<property name=\"" + object.getName()
                            + "\" value=\""
                            + StringUtilities.escapeForXML(_oldExpression)
                            + "\"/>";
                    MoMLChangeRequest request = new MoMLChangeRequest(this, // originator
                            parent, // context
                            moml, // MoML code
                            null); // base
                    object.requestChange(request);
                }

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            String moml = "<group><entity name=\"" + state.getName(container)
                    + "\"><property name=\"refinementName\" value=\""
                    + newRefinements.toString() + "\"/></entity>" + removal
                    + "</group>";
            MoMLChangeRequest change = new MoMLChangeRequest(this, container,
                    moml);
            container.requestChange(change);
        }

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