Examples of ptolemy.kernel.util.Settable.validate()

ptolemy.kernel.util.Settable.validate()
Check the validity of the expression set in setExpression(). Implementations of this method should notify the container by calling attributeChanged(), unless the container has already been notified in setExpression(). They should also notify any registered value listeners if they have not already been notified. If any other instances of Settable are validated as a side effect, then an implementation should return a Collection containing those instances. This can be used by the caller to avoid validating those again. The list may contain this instance of Settable. @return A collection of settables that are also validated as aside effect, or null if there are none. @exception IllegalActionException If the expression is not valid, orits value is not acceptable to the container or the listeners.

                // NOTE: We used to catch exceptions here and issue
                // a warning only, but this has the side effect of blocking
                // the mechanism in PtolemyQuery that carefully prompts
                // the user for corrected parameter values.
                try {
                    param.validate();


                    // Also validate derived objects.
                    Iterator derivedParams = ((NamedObj) param)
                            .getDerivedList().iterator();

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                    Iterator derivedParams = ((NamedObj) param)
                            .getDerivedList().iterator();


                    while (derivedParams.hasNext()) {
                        Settable derivedParam = (Settable) derivedParams.next();
                        derivedParam.validate();
                        parametersValidated.add(derivedParam);
                    }


                    if (param instanceof SharedParameter) {
                        parametersValidated.addAll(((SharedParameter) param)

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        // validate all settable attributes.
        Iterator attributes = attributeList(Settable.class).iterator();
        while (attributes.hasNext()) {
            Settable attribute = (Settable) attributes.next();
            attribute.validate();
        }
        // preinitialize protected variables.
        _currentTime = getModelStartTime();
        _stopRequested = false;
        // preinitialize all the contained actors.

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                        // are not notified.  Since the original
                        // value was invalid, it is not acceptable
                        // to skip notification in this case.  So
                        // we force it.
                        try {
                            attribute.validate();
                        } catch (IllegalActionException ex) {
                            change.setErrorReported(false);
                            changeFailed(change, ex);
                        }
                    }

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                // is not represented in a string.
                request = new ChangeRequest(this, name) {
                    protected void _execute() throws IllegalActionException {
                        char[] password = getCharArrayValue(name);
                        ((PasswordAttribute) attribute).setPassword(password);
                        attribute.validate();


                        Iterator derived = ((PasswordAttribute) attribute)
                                .getDerivedList().iterator();


                        while (derived.hasNext()) {

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                // set its value directly.
                request = new ChangeRequest(this, name) {
                    protected void _execute() throws IllegalActionException {
                        attribute.setExpression(getStringValue(name));


                        attribute.validate();


                        /* NOTE: Earlier version:
                         // Here, we need to handle instances of Variable
                         // specially.  This is too bad...
                         if (attribute instanceof Variable) {

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