Configuring a Large Object Mapping

Use a large object (LOB) mapping to specify that a persistent property or field should be persisted as a LOB to a database-supported LOB type. A LOB may be either a binary (BLOB) or character (CLOB) type.

You define a large object mapping at one of the property (getter or setter method) or field level of your entity.

For more information, see the following:

• "Understanding Direct-to-Field Mapping" in the Oracle TopLink Developer's Guide

• "Using a Converter Mapping" in the Oracle TopLink Developer's Guide

• "Type Conversion Converter" in the Oracle TopLink Developer's Guide

Using Annotations

Example 7-18 shows how to use the @Lob annotation to specify a large object mapping for field image.

Example 7-18 @Lob

@Lob(fetch=EAGER, type=BLOB)
@Column(name="IMAGE")
public Byte[] getImage() {
    return image;
}