JPO Method Signature and Input Argument

public static Object methodName(matrix.db.Context context, 
String[] args)

throws Exception

The input arguments are:

Context--passed in always.
String[] args--will have one element of type HashMap.

The input argument "arg" is a HashMap, which contains the details of the object to be processed. The data structure of this input parameter (HashMap) is defined below:

Key Name	Data Type	This key is assigned to the:
languageStr	String	Language string for the current browser setting. The program can use this key for any internationalization purpose.
New Value	String	Applicable only for use with Update Program and Update Function. Key "New Value" is assigned to the new value changed by the user.
objectId	String	Business object Id (OID) to be used in the current form page.
Old Value	String	Applicable only for use with Update Program and Update Function. Key "Old Value" is assigned to the actual value for the field before the user changed it.
relId	String	Relationship id (RelID) to be used for the form page.
requestMap	HashMap	Key "requestMap" is assigned to a HashMap, which contains a set of key/value pairs as available in the request object. The keys are of type String (parameter names) and the values are of type String (parameter value).

The JPO method can extract the information from the input argument for processing the data.

public static Object methodName(matrix.db.Context context, 
String[] args) throws Exception

HashMap programMap = (HashMap) JPO.unpackArgs(args);

HashMap requestMap = (HashMap) programMap.get("requestMap");

HashMap paramMap = (HashMap) programMap.get("paramMap");

String  objectId = (String) requestMap.get("objectId");

String  relId = (String) paramMap.get("relId");

String  languageStr = (String) requestMap.get("languageStr");

return object

The method returns an object of appropriate type depending on the where it is used. The details of return types are explained in the following sections.