javax.persistence.Lob - JPA annotation
javax.persistence
Annotation Lob
- Target:
- Fields (including property get methods)
Specifies that a persistent property or field should be persisted as a large object to a database-supported large object type.
Portable applications should use the Lob annotation when mapping to a database Lob type. The Lob annotation may be used in conjunction with the Basic annotation or the ElementCollection annotation when the element collection value is of basic type. A Lob may be either a binary or character type.
The Lob type is inferred from the type of the persistent field or property, and except for string and character-based types defaults to Blob.
Example 1:
@Lob @Basic(fetch=LAZY) @Column(name="REPORT") protected String report;
Example 2:
@Lob @Basic(fetch=LAZY) @Column(name="EMP_PIC", columnDefinition="BLOB NOT NULL") protected byte[] pic;
- Since:
- JPA 1.0
- See Also:
-
Basic -
ElementCollection
This annotation is a marker annotation (with no elements).
