| Interface | Description | 
|---|---|
| SavepointWriterOperatorFactory | 
 Creates a savepoint writing operator from a savepoint path. 
 | 
| Class | Description | 
|---|---|
| BootstrapTransformation<T> | 
 A  
BootstrapTransformation represents a procedure of writing new operator state into a Savepoint. | 
| ExistingSavepoint | 
 An existing savepoint. 
 | 
| KeyedOperatorTransformation<K,T> | 
 A  
KeyedOperatorTransformation represents a OneInputOperatorTransformation on which operator state is
 partitioned by key using a provided KeySelector. | 
| NewSavepoint | 
 A new savepoint. 
 | 
| OneInputOperatorTransformation<T> | 
OneInputOperatorTransformation represents a user defined transformation applied on
 an OperatorTransformation with one input. | 
| OperatorTransformation | 
 This class provides the entry point for building  
BootstrapTransformations,
 which represents procedures to bootstrap new operator states with a given DataSet. | 
| Savepoint | 
 This class provides entry points for loading an existing savepoint, or a new empty savepoint. 
 | 
| WritableSavepoint<F extends WritableSavepoint> | 
 A  
WritableSavepoint is any savepoint that can be written to from a batch context. | 
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