org.datanucleus.store.objectvaluegenerator
Interface ObjectValueGenerator

public interface ObjectValueGenerator

Interface providing value generation based on an input (persistable) object.

Method Summary

java.lang.Object

generate(ObjectManager om, java.lang.Object obj, ExtensionMetaData[] extensions) Method that takes the object being persisted by the specified ObjectManager and generates a value (based on the contents of the object).

Method Detail

generate

java.lang.Object generate(ObjectManager om,
                          java.lang.Object obj,
                          ExtensionMetaData[] extensions)

Method that takes the object being persisted by the specified ObjectManager and generates a value (based on the contents of the object). This could be used, for example, to generate a unique value for the object based on some of its fields.

Parameters:

om - The ObjectManager

obj - The object (persistent, or being persisted)

extensions - Extensions on the field being generated

Returns:

The value