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@Target(value={METHOD,FIELD})
@Retention(value=RUNTIME)
public @interface ReadTransformerAnnotation for org.eclipse.persistence.mappings.TransformationMapping. Unless the TransformationMapping is write-only, it should have a ReadTransformer, it defines transformation of database column(s) value(s) into attribute value. Also unless it's a read-only mapping, either WriteTransformer annotation or WriteTransformers annotation should be specified. Each WriteTransformer defines transformation of the attribute value to a single database column value (column is specified in the WriteTransformer).
Transformation,
WriteTransformer,
Transformation can be specified within an Entity, MappedSuperclass
and Embeddable class.| Optional Element Summary | |
|---|---|
java.lang.String |
method
The mapped class must have a method with this name which returns a value to be assigned to the attribute (not assigns the value to the attribute). |
java.lang.Class |
transformerClass
User-defined class that must implement the org.eclipse.persistence.mappings.transformers.AttributeTransformer interface. |
public abstract java.lang.Class transformerClass
public abstract java.lang.String method
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