Access input and output field data as a variable by using the name of the field as the name of the variable. For example, if “in_int” is an integer input field, you can access the data for this field by referring as a variable “in_int” with the Java primitive data type int. You do not need to declare input and output fields as variables.

Do not assign a value to an input field variable. If you assign a value to an input variable in the On Input Row section, you cannot get the input data for the corresponding field in the current row.

Use any static variable or user-defined method that you declared in the Helper Code section.

For example, an active Java transformation has two input fields, BASE_SALARY and BONUSES, with an integer data type, and a single output field, TOTAL_COMP, with an integer data type. You create a user-defined method in the Helper Code section, myTXAdd, that adds two integers and returns the result.

Use the following Java code in the On Input Row section to assign the total values for the input fields to the output field and generate an output row:

When the Java transformation receives an input row, it adds the values of the BASE_SALARY and BONUSES input fields, assigns the value to the TOTAL_COMP output field, and generates an output row.