Class StoreVirtualGraphPersistenceWrapper<TNodeID, TGraphID>

Base class for update operations on virtualized graphs. Implementors have to provide a method to convert standard Nodes to their virtual form according to the IVirtualRdfProvider which is in use.
Inheritance
System.Object
GraphPersistenceWrapper
StoreGraphPersistenceWrapper
StoreVirtualGraphPersistenceWrapper<TNodeID, TGraphID>
Implements
System.IDisposable
System.Xml.Serialization.IXmlSerializable
Inherited Members
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: VDS.RDF.Storage.Virtualisation
Assembly: dotNetRDF.dll
Syntax
public abstract class StoreVirtualGraphPersistenceWrapper<TNodeID, TGraphID> : StoreGraphPersistenceWrapper, ITransactionalGraph, IGraph, INodeFactory, IDisposable, IXmlSerializable
Type Parameters
Name Description
TNodeID Node ID Type.
TGraphID Graph ID Type.

Constructors

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StoreVirtualGraphPersistenceWrapper(IStorageProvider, IVirtualRdfProvider<TNodeID, TGraphID>, IGraph, Uri, Boolean)

Creates a new Store Graph Persistence Wrapper for Virtualized Nodes.
Declaration
public StoreVirtualGraphPersistenceWrapper(IStorageProvider manager, IVirtualRdfProvider<TNodeID, TGraphID> provider, IGraph g, Uri graphUri, bool writeOnly)
Parameters
Type Name Description
IStorageProvider manager Generic IO Manager.
IVirtualRdfProvider<TNodeID, TGraphID> provider Virtual RDF Provider.
IGraph g Graph with virtualized Nodes to wrap.
System.Uri graphUri Graph URI (the URI the Graph will be persisted as).
System.Boolean writeOnly Whether to operate in write-only mode.
Remarks

Note: In order to operate in write-only mode the IStorageProvider must support triple level updates indicated by it returning true to its UpdateSupported property and the Graph to be wrapped must be an empty Graph.

Fields

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_provider

Virtual RDF Provider.
Declaration
protected readonly IVirtualRdfProvider<TNodeID, TGraphID> _provider
Field Value
Type Description
IVirtualRdfProvider<TNodeID, TGraphID>

Methods

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Assert(Triple)

Asserts a Triple after virtualization in the Graph.
Declaration
public override bool Assert(Triple t)
Parameters
Type Name Description
Triple t Triple.
Returns
Type Description
System.Boolean
Overrides
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ContainsTriple(Triple)

Gets whether the virtualized form of a given Triple exists in this Graph.
Declaration
public override bool ContainsTriple(Triple t)
Parameters
Type Name Description
Triple t Triple to test.
Returns
Type Description
System.Boolean Triple is known to the Graph.
Overrides
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CreateVirtual(IVirtualRdfProvider<TNodeID, TGraphID>, INode)

Converts a standard INode to a virtualized node with a pre-materialized value.
Declaration
protected abstract INode CreateVirtual(IVirtualRdfProvider<TNodeID, TGraphID> provider, INode preMaterializedValue)
Parameters
Type Name Description
IVirtualRdfProvider<TNodeID, TGraphID> provider Virtual RDF Provider, the object, e.g. a storage manger, that provides virtualization of nodes.
INode preMaterializedValue Node that has to be converted to it's virtualized form with itself as materialized value. Usually a parsed Literal or Uri.
Returns
Type Description
INode
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Retract(Triple)

Retracts a Triple after virtualization from the Graph.
Declaration
public override bool Retract(Triple t)
Parameters
Type Name Description
Triple t Triple.
Returns
Type Description
System.Boolean
Overrides
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VirtualizeNode(INode)

Virtualizes a Node.
Declaration
protected INode VirtualizeNode(INode n)
Parameters
Type Name Description
INode n Node to be virtualized.
Returns
Type Description
INode The Node in its virtual form. Itself, if it was already virtual.
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VirtualizeTriple(Triple)

Converts subject, predicate and object of a given Triple to their respective virtualized forms.
Declaration
protected Triple VirtualizeTriple(Triple t)
Parameters
Type Name Description
Triple t Triple to virtualize.
Returns
Type Description
Triple The virtualized Triple. Itself, if it was already virtual.

Implements

System.IDisposable
System.Xml.Serialization.IXmlSerializable

Extension Methods