Lob (Java EE 6 )

Overview

Package

Class

Tree

Deprecated

Index

Help

PREV CLASS NEXT CLASS

FRAMES NO FRAMES All Classes

SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence
Annotation Type Lob

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

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:: Java Persistence 1.0
See Also:: Basic, ElementCollection