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public abstract void setEmail(String email);

public abstract String getPassword();

public abstract void setPassword(String password);

}

Notice that the entity bean is declared abstract, and that it defines abstract getters and

setter methods for its CMP fields. (Note that the ellipsis is used to abbreviate the listing

to the parts of interest.)

It is likely that you will have to map the entity to a database table and CMP fields to

columns that table. The next panel shows a sample table that could be used in

conjunction with this entity.

Sample table for

UserBean

The CMP fields in the

UserBean

may correspond to field in a relational table as

defined by the following SQL DDL:

CREATE TABLE TBL_USER (

email varchar (50)

PRIMARY KEY,

password varchar (50) NOT NULL

)

Note that since the mapping from entities to tables is left up to each individual EJB

container, I will not cover the specifics of the mapping in this tutorial. (This will be

covered in a follow up article that ports these examples to WebLogic and JBoss.)

Instead I use the default mapping provided by the J2EE reference implementation.

Defining CMP fields in the deployment descriptor

Each one of the CMP fields has to be defined in the deployment descriptor as follows:

password

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Introducing EJB CMP/CMR, Part 1 of 2