// constraint language
locator = "constraintLanguage";
parsed = pHelper.getParameterValues(request,locator);
supported = new SupportedValues("CQL_TEXT,FILTER",",");
String constraintLanguage = vHelper.validateValue(supported,locator,parsed,false);
// constraint version
locator = "constraint_language_version";
parsed = pHelper.getParameterValues(request,locator);
String constraintVersion = vHelper.validateValue(locator,parsed,false);