Examples of ptolemy.kernel.util.ChangeRequest

ptolemy.kernel.util.ChangeRequest
Abstract base class for change requests. A change request is any modification to a model that might be performed during execution of the model, but where there might only be certain phases of execution during which it is safe to make the modification. Such changes are also called mutations.
A typical use of this class is to define an anonymous inner class that implements the _execute() method to bring about the desired change. The instance of that anonymous inner class is then queued with an instance of NamedObj using its requestChange() method. The execute() method must be called only once; attempting to call it multiple times will trigger an exception.
Concrete derived classes can be defined to implement mutations of a certain kind or in a certain way. Instances of these classes should be queued with a NamedObj, just like an anonymous inner class extending this class. MoMLChangeRequest is such a concrete derived class, where the mutation is specified as MoML code. @author Edward A. Lee @version $Id: ChangeRequest.java,v 1.47 2006/02/07 00:46:30 cxh Exp $ @since Ptolemy II 1.0 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (neuendor) @see ChangeListener

                                + "\"" + 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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     */
    private static void _instantiateLibrary(final CompositeEntity library,
            final ModelDirectory directory, Configuration configuration,
            File file, final CompositeEntity libraryContainer,
            final PtolemyEffigy finalLibraryEffigy) throws Exception {
        ChangeRequest request = new ChangeRequest(configuration, file.toURI()
                .toURL().toString()) {
            protected void _execute() throws Exception {
                // The library is a class!
                library.setClassDefinition(true);
                library.instantiate(libraryContainer, library.getName());
                finalLibraryEffigy.setContainer(directory);
            }
        };


        libraryContainer.requestChange(request);
        request.waitForCompletion();
    }

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                    + target.getFullName()
                    + " because the position is set by the class.");
            return;
        }


        ChangeRequest request = new ChangeRequest(target, "Move towards last") {
            protected void _execute() throws IllegalActionException {
                // Static method takes a list, so we construct a
                // list with one element.
                LinkedList targets = new LinkedList();
                targets.add(target);

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                // If the director does not already have a
                // DebugController, create one.
                String moml = "<property name=\""
                        + _DEBUGCONTROLLER
                        + "\" class=\"ptolemy.vergil.debugger.DebugController\"/>";
                ChangeRequest request = new MoMLChangeRequest(this, // originator
                        director, // context
                        moml);
                request.addChangeListener(this);
                director.requestChange(request);
            }
        } else {
            // If BreakpointConfigurerDialog()._handlClosing()
            // calls this in appropriately, then debugController might be

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        super.actionPerformed(e);


        final NamedObj object = getTarget();


        // Do this as a change request since it may add a new icon.
        ChangeRequest request = new ChangeRequest(this, "Edit Custom Icon") {
            protected void _execute() throws Exception {
                EditorIcon icon = null;
                List iconList = object.attributeList(EditorIcon.class);


                if (iconList.size() > 0) {

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                        ingredientList = ((GTIngredientsAttribute) attributes
                                .get(0)).getIngredientList();
                    }
                }
                for (GTIngredient ingredient : ingredientList) {
                    ChangeRequest request;
                    try {
                        request = ((Operation) ingredient).getChangeRequest(
                                _pattern, _replacement, _matchResult,
                                patternEntity, replacementEntity, hostEntity);
                        if (request != null) {
                            request.execute();
                        }
                    } catch (IllegalActionException e) {
                        throw new TransformationException(
                                "Unable to obtain change request.", e);
                    }

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                        + "\" class=\"ptolemy.kernel.util.Location\""
                        + " value=\"[" + x + ", " + y + "]\"/>\n"
                        + "</entity>\n";
            }


            ChangeRequest request = new MoMLChangeRequest(this, toplevel, moml);
            toplevel.requestChange(request);


            try {
                request.waitForCompletion();
            } catch (Exception ex) {
                throw new GraphException(ex);
            }
        }

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                    port.setMultiport(isMultiport);
                } else if (ingredient instanceof SubclassCriterion
                        && !isIconSet) {
                    SubclassCriterion criterion = (SubclassCriterion) ingredient;
                    final String superclass = criterion.getSuperclass();
                    ((NamedObj) entity).requestChange(new ChangeRequest(entity,
                            "Deferred load actor icon action.") {
                        protected void _execute() throws Exception {
                            _loadActorIcon(entity, superclass);
                        }
                    });

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