Helper Classes (The Java EE 5 Tutorial)

The Java EE 5 Tutorial

Helper Classes

The EJB JAR files include several helper classes that are used by the enterprise beans. The source code for these classes is in the following directory:

tut-install/javaeetutorial5/examples/dukesbank/dukesbank-ejb/src/java/com/sun/tutorial/
javaee/dukesbank/util/

Table 37–1 briefly describes the helper classes.

Table 37–1 Helper Classes for the Application’s Enterprise Beans


Class Name	Description
`AccountDetails`	Encapsulates the state of an `Account` instance. Returned by the `getDetails` method of `AccountControllerBean`.
`CustomerDetails`	Encapsulates the state of a `Customer` instance. Returned by the `getDetails` method of `CustomerControllerBean`.
`Debug`	Has simple methods for printing a debugging message from an enterprise bean. These messages appear on the standard output of the Application Server when it’s run with the `--verbose` option and in the server log.
`DomainUtil`	Contains validation methods: `getAccountTypes`, `checkAccountType`, and `isCreditAccount`.
`TxDetails`	Encapsulates the state of a `Tx` instance. Returned by the `getDetails` method of `TxControllerBean`.