public static String replaceParams(String stepCall, Map<String, Object> context) {
	stepCall = convertPrameter(stepCall);
	//don't resolve quoted parameters.
	stepCall = stepCall.replace("\"${", "\"<%{").replace("'${", "'<%{");
	//qaf#321 
	StrLookup lookup = new StrLookup() {
		public String lookup(String var) {

			Object prop = context.get(var);
			if(prop==null) {
				prop = getBundle().getSubstitutor().getVariableResolver().lookup(var);
			}
			return (prop != null) ? JSONUtil.toString(prop) : null;
		}
	};		
	StrSubstitutor interpol = new StrSubstitutor(lookup);
	stepCall = interpol.replace(stepCall);
	
	stepCall = stepCall.replace( "\"<%{","\"${").replace( "'<%{","'${");
	return stepCall;
}
 

@Override
protected StrLookup fetchLookupForPrefix(String prefix) {
    return errorLookup;
}
 

@Override
protected StrLookup fetchNoPrefixLookup() {
    return errorLookup;
}