Class GenericUpdateProcessor

SPARQL Update Processor which processes commands against a generic underlying store represented by an IStorageProvider implementation.

Inheritance

object

GenericUpdateProcessor

Implements

ISparqlUpdateProcessor

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: VDS.RDF.Update

Assembly: dotNetRdf.dll

Syntax

public class GenericUpdateProcessor : ISparqlUpdateProcessor

Remarks

If the provided manager also implements the IUpdateableStorage interface then the managers native SPARQL Update implementation will be used for the non-type specific calls i.e. ProcessCommand() and ProcessCommandSet(). At all other times the SPARQL Update commands will be processed by approximating their behaviour through calls to SaveGraph(), LoadGraph() and UpdateGraph() in addition to local in-memory manipulation of the data. Some commands such as INSERT and DELETE can only be processed when the manager is also a IQueryableStorage since they rely on making a query and performing actions based on the results of that query.

The performance of this processor is somewhat dependent on the underlying IStorageProvider. If the underlying manager supports triple level updates as indicated by the UpdateSupported property then operations can be performed quite efficiently, if this is not the case then any operation which modifies a Graph will need to load the existing Graph from the store, make the modifications locally in-memory and then save the resulting Graph back to the Store.

Constructors

GenericUpdateProcessor(IStorageProvider, Loader)

Creates a new Generic Update Processor.

Declaration

public GenericUpdateProcessor(IStorageProvider manager, Loader loader = null)

Parameters

Type	Name	Description
IStorageProvider	manager	Generic IO Manager.
Loader	loader	The loader to use when retrieving RDF data for a LOAD command.

Properties

Loader

Get the loader configured for this processor.

Declaration

public Loader Loader { get; }

Property Value

Type	Description
Loader

Methods

Discard()

Discards any outstanding changes.

Declaration

public virtual void Discard()

Flush()

Flushes any outstanding changes to the underlying store.

Declaration

public virtual void Flush()

ProcessAddCommand(AddCommand)

Processes an ADD command.

Declaration

public void ProcessAddCommand(AddCommand cmd)

Parameters

Type	Name	Description
AddCommand	cmd	Add Command.

ProcessClearCommand(ClearCommand)

Processes a CLEAR command.

Declaration

public void ProcessClearCommand(ClearCommand cmd)

Parameters

Type	Name	Description
ClearCommand	cmd	Clear Command.

Remarks

Implemented by replacing the Graph with an empty Graph.

ProcessCommand(SparqlUpdateCommand)

Processes a command.

Declaration

public virtual void ProcessCommand(SparqlUpdateCommand cmd)

Parameters

Type	Name	Description
SparqlUpdateCommand	cmd	Command.

Remarks

If the provided manager also implements the IUpdateableStorage interface then the managers native SPARQL Update implementation will be used.

ProcessCommandSet(SparqlUpdateCommandSet)

Processes a command set.

Declaration

public virtual void ProcessCommandSet(SparqlUpdateCommandSet commands)

Parameters

Type	Name	Description
SparqlUpdateCommandSet	commands	Command Set.

Remarks

If the provided manager also implements the IUpdateableStorage interface then the managers native SPARQL Update implementation will be used.

ProcessCopyCommand(CopyCommand)

Processes a COPY command.

Declaration

public void ProcessCopyCommand(CopyCommand cmd)

Parameters

Type	Name	Description
CopyCommand	cmd	Copy Command.

ProcessCreateCommand(CreateCommand)

Processes a CREATE command.

Declaration

public void ProcessCreateCommand(CreateCommand cmd)

Parameters

Type	Name	Description
CreateCommand	cmd	Create Command.

Remarks

Implemented by adding an empty Graph to the Store.

Warning: As the IStorageProvider interface does not allow checking whether a Graph exists processing CREATE commands can result in overwriting existing Graphs.

ProcessDeleteCommand(DeleteCommand)

Processes a DELETE command.

Declaration

public void ProcessDeleteCommand(DeleteCommand cmd)

Parameters

Type	Name	Description
DeleteCommand	cmd	Delete Command.

Remarks

Note: The underlying manager must implement the IQueryableStorage interface in order for DELETE commands to be processed.

ProcessDeleteDataCommand(DeleteDataCommand)

Processes a DELETE DATA command.

Declaration

public void ProcessDeleteDataCommand(DeleteDataCommand cmd)

Parameters

Type	Name	Description
DeleteDataCommand	cmd	DELETE Data Command.

ProcessDropCommand(DropCommand)

Processes a DROP command.

Declaration

public void ProcessDropCommand(DropCommand cmd)

Parameters

Type	Name	Description
DropCommand	cmd	Drop Command.

ProcessInsertCommand(InsertCommand)

Processes an INSERT command.

Declaration

public void ProcessInsertCommand(InsertCommand cmd)

Parameters

Type	Name	Description
InsertCommand	cmd	Insert Command.

Remarks

Note: The underlying manager must implement the IQueryableStorage interface in order for INSERT commands to be processed.

ProcessInsertDataCommand(InsertDataCommand)

Processes an INSERT DATA command.

Declaration

public void ProcessInsertDataCommand(InsertDataCommand cmd)

Parameters

Type	Name	Description
InsertDataCommand	cmd	Insert Data Command.

ProcessLoadCommand(LoadCommand)

Processes a LOAD command.

Declaration

public void ProcessLoadCommand(LoadCommand cmd)

Parameters

Type	Name	Description
LoadCommand	cmd	Load Command.

ProcessModifyCommand(ModifyCommand)

Processes an INSERT/DELETE command.

Declaration

public void ProcessModifyCommand(ModifyCommand cmd)

Parameters

Type	Name	Description
ModifyCommand	cmd	Insert/Delete Command.

ProcessMoveCommand(MoveCommand)

Processes a MOVE command.

Declaration

public void ProcessMoveCommand(MoveCommand cmd)

Parameters

Type	Name	Description
MoveCommand	cmd	Move Command.

Implements

ISparqlUpdateProcessor

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)