@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
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