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



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Generated on 10-February-2011 12:41


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