| Class | Description | 
|---|---|
| Historian | 
 The Historian is a helper class used by the HistoryManager to take on the
 responsibility of doing the actual persisting of a given object's contents. 
 | 
| HistoryContext | 
 Provides typesafe getter and setter methods for data stored
 in a Context that is specific to the history manager. 
 | 
| HistoryManager | 
 The HistoryManager is responsible for keeping a record of local changes for
 the purpose of later state comparrison and restoration. 
 | 
| LocalState | 
| Exception | Description | 
|---|---|
| HistoryPersistenceException | 
 Signals that an error occurred while writing/restoring a history record. 
 | 
Related Documentation
See Extending JDeveloper Using the Addin API for additional details.