How to create a custom javascript provider for RTC

Hello,

I am trying to create a custom provider in order to calculate a risk exposure (the risk exposure already in place doesn't suit my needs).
In order to do that, i inspired my javascript on a video i found (http://dl.dropboxusercontent.com/u/2663305/Movies/rtc-2.0.0.2-attribute-value-providers.m4v around 4 minutes in) and i came up with the script copied at the end of my message.

I created the attributes with ID severitylevel and frequencylevel, they are both enumeration that go from 1 to 5.
I specified in my risklevel attribute that they are dependencies, my risklevel attribute is an integer type.

However, i can't get this to work, if you have any idea i would be grateful if you could share them with me.

Best regards,
Cédric Mabileau


Source code for my javascript :

dojo.provide("com.example.RiskProvider");

(function() {
    dojo.declare("com.example.riskProvider", null, {

        getValue: function(attribute, workItem, configuration) {
            var severityAttribute= configuration.getChild("severitylevel").id;
            var frequencyAttribute= configuration.getChild("frequencylevel").id;
           
            var severity = this.__getLastIntSegment(workItem.getvalue(severityAttribute));
            var frequency= this.__getLastIntSegment(workItem.getvalue(frequencyAttribute));
           
            var riskInteger= severity * frequency
           
            switch (riskInteger ) {
                case riskInteger > 12:
                var risk= 1;
                break;
               
                case ((riskInteger < 12) && (riskInteger > 9)) :
                var risk= 2;
                break;               
               
                case ((riskInteger < 9) && (riskInteger > 5)):
                var risk= 3;
                break;               
               
                case riskInteger = 4:
                    if (severity = 4) {
                        var risk = 3;
                        }
                    else {
                        var risk =4;
                        }
                break;               
               
                case riskInteger < 3:
                var risk= 4;
                break;
               
            return risk;
           
        },
       
        __getLastIntSegment : function(identifier) {
            if (identifier != null) {
                var lastSeparator= identifier.lastIndexOf('.');
                var numberString= identifier.substring(lastSeparator+1);
                return parseInt(numberString, 10);
            }
            return -1;
        },
    });
})();