Transformation Guide

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defineJExpression

Defines an expression, including the expression string and input parameters. Arguments for the defineJExpression method include an array of JExprParamMetadata objects that contains the input parameters and a string value that defines the expression syntax.

Use the following syntax:

defineJExpression(
    String expression, 
    Object[] paramMetadataArray
    );

The following table describes the parameters:

Parameter	Type	Datatype	Description
expression	Input	String	String that represents the expression.
paramMetadataArray	Input	Object[]	Array of JExprParaMetadata objects that contain the input parameters for the expression.

You can add the defineJExpression method to the Java code on any code entry tab except the

Imports

and

Functions

tabs.

To use the defineJExpression method, you must instantiate an array of JExprParamMetadata objects that represent the input parameters for the expression. You set the metadata values for the parameters and pass the array as a parameter to the defineJExpression method.

For example, the following Java code creates an expression to look up the value of two strings:

JExprParaMetadata params[] = new JExprParamMetadata[2];
params[0] = new JExprParamMetadata(EDataType.STRING, 20, 0);
params[1] = new JExprParamMetadata(EDataType.STRING, 20, 0);
defineJExpression(":lkp.mylookup(x1,x2)",params);

You must number the parameters that you pass to the expression consecutively and start the parameters with the letter x. For example, to pass three parameters to an expression, name the parameters x1, x2, and x3.

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Transformation Guide

defineJExpression

defineJExpression