Row.

Applies the transformation logic to one row of data at a time. Choose Row when the results of the transformation depend on a single row of data. You must choose Row for passive transformations.

Transaction.

Applies the transformation logic to all rows in a transaction. Choose Transaction when the results of the transformation depend on all rows in the same transaction, but not on rows in other transactions. For example, you might choose Transaction when the Java code performs aggregate calculations on the data in a single transaction.

All Input.

Applies the transformation logic to all incoming data. When you choose All Input, the Integration Service drops transaction boundaries. Choose All Input when the results of the transformation depend on all rows of data in the source. For example, you might choose All Input when the Java code for the transformation sorts all incoming data.