// add the value(s) as a http request header
if (values.size() > 0) {
// use the default toString of a ArrayList to create in the form [xxx, yyy]
// if multi valued, for a single value, then just output the value as is
String s = values.size() > 1 ? values.toString() : values.get(0);
httpRequest.addHeader(key, s);
}
}
}
// lets store the result in the output message.