javax.persistence
Annotation Type Basic

@Target(value={METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface Basic

The Basic annotation is the simplest type of mapping to a database column. The Basic annotation can be applied to a persistent property or instance variable of any of the following types: Java primitive types, wrappers of the primitive types, java.lang.String, java.math.BigInteger, java.math.BigDecimal, java.util.Date, java.util.Calendar, java.sql.Date, java.sql.Time, java.sql.Timestamp, byte[], Byte[], char[], Character[], enums, and any other type that implements Serializable.

Since:

EJB 3.0 version.

Author:

Florent Benoit

See Also:

EJB 3.0 specification

Optional Element Summary

FetchType	fetch (Optional) Whether the value of the field or property should be lazily loaded or must be eagerly fetched.
boolean	optional (Optional) Whether the value of the field or property may be null.

fetch

public abstract FetchType fetch

(Optional) Whether the value of the field or property should be lazily loaded or must be eagerly fetched. The EAGER strategy is a requirement on the persistence provider runtime that the value must be eagerly fetched. The LAZY strategy is a hint to the persistence provider runtime.

Default:

javax.persistence.FetchType.EAGER

optional

public abstract boolean optional

(Optional) Whether the value of the field or property may be null. This is a hint and is disregarded for primitive types; it may be used in schema generation.

Default:

true