Defining the return type for a user-defined function

You must specify the return type for a user-defined function as part of setting up the parameters. You can set this return type using the following method on the com.progress.open4gl.javaproxy.ParamArray object:

Syntax

public void setReturnType(int proType) throws Open4GLException

proType

Specifies an ABL data type returned by the user-defined function and indicated by a class constant defined in the com.progress.open4gl.Parameter class, as shown in the following table.

Note: User-defined functions cannot return LONGCHAR and MEMPTR data across an AppServer.

Table 34. User-defined function return types for the OpenAPI
ABL data type	com.progress.open4gl.Parameterclass constant
CHARACTER	PRO_CHARACTER
COM-HANDLE	PRO_COMHANDLE
DATE	PRO_DATE
DATETIME	PRO_DATETIME
DATETIME-TZ	PRO_DATETIMETZ
DECIMAL	PRO_DECIMAL
INT64	PRO_INT64
INTEGER	PRO_INTEGER
LOGICAL	PRO_LOGICAL
RAW	PRO_RAW
RECID	PRO_RECID
ROWID	PRO_ROWID
WIDGET-HANDLE	PRO_WIDGETHANDLE

For example, to set the return type for a user-defined function to the ABL INTEGER data type, you can invoke the setReturnType() method on a ParamArray object, parms, as follows:

parms.setReturnType(Parameter.PRO_INTEGER);