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  * Copyright (c) 2008, 2009 Sun Microsystems. All rights reserved.
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
  * which accompanies this distribution.
  * The Eclipse Public License is available at
  * and the Eclipse Distribution License is available at
 * Contributors:
 *     Linda DeMichiel - Java Persistence 2.0 - Version 2.0 (October 1, 2009)
 *     Specification available from
// $Id: 20957 2011-06-13 09:58:51Z stliu $
package javax.persistence;
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 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)
   protected String report;

   Example 2:

   @Lob @Basic(fetch=LAZY)
   @Column(name="EMP_PIC", columnDefinition="BLOB NOT NULL")
   protected byte[] pic;


Java Persistence 1.0
See also:
public @interface Lob {
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