@Target(value={METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface Basic
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, 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 java.io.Serializable.
The use of the Basic annotation is optional for
persistent fields and properties of these types. If the
Basic annotation is not specified for such a field or
property, the default values of the Basic annotation
will apply.
Example 1:
@Basic
protected String name;
Example 2:
@Basic(fetch=LAZY)
protected String getName() { return name; }
| Modifier and Type | Optional Element and Description |
|---|---|
FetchType |
fetch
(Optional) Defines whether the value of the field or property should
be lazily loaded or must be eagerly fetched.
|
boolean |
optional
(Optional) Defines whether the value of the field or property may be null.
|
public abstract FetchType fetch
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.
If not specified, defaults to EAGER.public abstract boolean optional
true.