| javax.persistence.Basic
| Basic | | public @interface Basic(Code) | | 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,
String ,
java.math.BigInteger java.math.BigInteger ,
java.math.BigDecimal java.math.BigDecimal ,
java.util.Date java.util.Date ,
java.util.Calendar java.util.Calendar ,
java.sql.Date java.sql.Date ,
java.sql.Time java.sql.Time ,
java.sql.Timestamp java.sql.Timestamp , byte[], Byte[],
char[], Character[], enums, and any other type that implements
java.io.Serializable Serializable .
The use of the Basic annotation is optional for
persistent fields and properties of these types.
since:
Java Persistence 1.0 |
| Field Summary | |
| 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. |
| fetch | | FetchType fetch(Code) | | (Optional) Defines 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.
If not specified, defaults to EAGER.
|
| optional | | boolean optional(Code) | | (Optional) Defines 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.
If not specified, defaults to true.
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