Examples of ptolemy.kernel.util.ModelErrorHandler

ptolemy.kernel.util.ModelErrorHandler

Interface for model error handlers. A model error is an exception that is passed up the Ptolemy II hierarchy for handling until a container with a registered error handler is found. If there is no registered error handler, then the error is ignored. It is like throwing an exception, except that instead of unraveling the calling stack, it travels up the Ptolemy II hierarchy.

A typical use of this facility is where an actor does the following:

 handleModelError(this, new IllegalActionException(this, message));

instead of this:

 throw new IllegalActionException(this, message);

The former allows a container in the hierarchy to intercept the exception, whereas the latter simply throws the exception. @author Edward A. Lee @version $Id: ModelErrorHandler.java,v 1.17 2005/07/08 19:59:17 cxh Exp $ @since Ptolemy II 2.1 @Pt.ProposedRating Green (eal) @Pt.AcceptedRating Green (hyzheng)

            State st = controller.currentState();
            List enabledTransitions = controller.enabledTransitions(st
                    .nonpreemptiveTransitionList());


            if (enabledTransitions.size() == 0) {
                ModelErrorHandler container = getContainer();


                if (container != null) {
                    // We can not call the handleModelError() method of the
                    // super class, because the container will call this
                    // method again and it will lead to a dead loop.

Examples of ptolemy.kernel.util.ModelErrorHandler

Related Classes of ptolemy.kernel.util.ModelErrorHandler