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Generating a Message |
It's straightforward to create a message and populate it with data in Chameleon. First you must create a instance of the message.
The constructor for each custom message object requires an instance of an Engine object. The Engine object must have been pre-loaded with the same message definition file used to create the message object.
Engine ApplicationEngine = new Engine();
Engine.load("message.vmd");
MessageName AMessage = new MessageName(ApplicationEngine) |
The tables in the message are then populated by using addRow() to add rows, and the set<field name>(...) methods to assign values to the table columns. We'll give a simple code example for creating the following message:
MSH|^~\&|REGADT|MCM|RSP1P8|MCM|199601051530|SEC|ADT^A44|00000007|P|2.5 EVN|A44|199601051530 PID|||MR2^^^XYZ||JONES^WILLIAM^A^JR||19501010|M|||123 EAST STREET^^NY^NY^10021||111-3333^212|||S||ACCT1 MRG|MR1^^^XYZ||ACCT1 |
The Table Grammar of the message is shown below:
Table Grammar
class GeneratePatientUpdate implements GenerateMessage
{
public String generateMessage(Engine AEngine) throws ChameleonException
{
//Create a new message object.
PatientUpdate AMessage = new PatientUpdate(AEngine);
//Add one row into the Header Table.
AMessage.Header().addRow();
//Populating the data in the Header Table.
AMessage.Header(0).setSendApplication("REGADT");
AMessage.Header(0).setSendFacility("MCM");
.
.
.
// Add Three rows into the Patient Table.
AMessage.Patient().addRow();
AMessage.Patient().addRow();
AMessage.Patient().addRow();
.
.
.
AMessage.Patient(0).setBirthday("19501010");
AMessage.Patient(0).setSex("M");
.
.
.
// Add a row to the phone group.
AMessage.PhoneGrp().addRow();
// Add a row into the phonenumsub table under the group.
AMessage.PhoneGrp(0).PhoneNumSub().addRow();
//Populating the data to the first row of sub-Table1.
AMessage.PhoneGrp(0).PhoneNumSub(0).setPhoneNumber("111-3333");
AMessage.PhoneGrp(0).PhoneNumSub(0).setAreaCode("212");
return AMessage.generateMessage();
// generateMessage frees the underlying table, therefore
// it's not possible to call it twice. See garbage collection
// issues section.
}
}
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