Developer Transformation Guide

Back Next

Working with the Advanced Interface

In the advanced interface, you can use object oriented API methods to define, invoke, and get the result of an expression.

The following table describes the classes and API methods that are available in the advanced interface:

Class or API Method	Description
EDataType class	Enumerates the datatypes for an expression.
JExprParamMetadata class	Contains the metadata for each parameter in an expression. Parameter metadata includes datatype, precision, and scale.
defineJExpression API method	Defines the expression. Includes expression string and parameters.
invokeJExpression API method	Invokes an expression.
JExpression class	Contains the methods to create, invoke, get the metadata and get the expression result, and check the return datatype.