javax.persistence.Lob Maven / Gradle / Ivy
// $Id: Lob.java 17752 2009-10-15 01:19:21Z [email protected] $
// EJB3 Specification Copyright 2004-2009 Sun Microsystems, Inc.
package javax.persistence;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* 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 {@link Basic}
* annotation or the {@link 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;
*
*
*
* @see Basic
* @see ElementCollection
*
* @since Java Persistence 1.0
*/
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface Lob {
}