Java Reference
In-Depth Information
The EJB 3.0 entity bean generated from the EJB 2.0 entity bean is listed below. First,
the import statements are specified.
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Column;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.ManyToOne;
import javax.persistence.ManyToMany;
import javax.persistence.Table;
The @Entity annotation specifies the class to be an entity class. And, the @Table
annotation specifies the table name.
The named queries are grouped with the @NamedQueries annotation and each
named query is specified with the @NamedQuery annotation. The name attribute
specifies the named query name that may be used with EntityManager when
creating query objects. The query attribute specifies the query string in the Java
Persistence query language.
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