Annotation Type Lob

@Target({METHOD,FIELD})
@Retention(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