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## org.apache.openjpa.event
Interface OrphanedKeyAction

All Known Implementing Classes:
  ExceptionOrphanedKeyAction, LogOrphanedKeyAction, NoneOrphanedKeyAction

    public interface OrphanedKeyAction

Perform an action when OpenJPA detects an orphaned key in the database.

Since:
  0.3.2.2
Author:
  Abe White

Method Summary
`Object` | `orphan(Object oid, OpenJPAStateManager sm, ValueMetaData vmd)` Callback received when OpenJPA discovers an orphaned key.

Method Detail

### orphan

    Object orphan(Object oid,
                  OpenJPAStateManager sm,
                  ValueMetaData vmd)

  Callback received when OpenJPA discovers an orphaned key.

  Parameters:
    `oid` - the orphaned key
    `sm` - the instance representing the record in which the key was discovered; may be null
    `vmd` - the value in which the key was discovered
  Returns:
    the value to load into field `fmd`; typically `null`

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