}
public StringWriter generatePurchaseOrder() throws IOException {
StringWriter writer = new StringWriter();
JsonGenerator generator = Json.createGenerator(writer);
generator.writeStartObject()
.write("id", "1234")
.write("date", "05/06/2013")
.writeStartObject("customer")
.write("first_name", "James")
.write("last_name", "Rorrison")