Class BaseTripleStore

Abstract Base Class for a Triple Store.

Inheritance
System.Object
BaseTripleStore
PersistentTripleStore
SimpleTripleStore
TripleStore
Implements
System.IDisposable
Inherited Members
object.Equals(object)
object.Equals(object, object)
object.GetHashCode()
object.GetType()
object.MemberwiseClone()
object.ReferenceEquals(object, object)
object.ToString()
Namespace: VDS.RDF
Assembly: dotNetRdf.dll
Syntax
public abstract class BaseTripleStore : ITripleStore, IDisposable

Constructors

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BaseTripleStore(BaseGraphCollection)

Creates a new Base Triple Store.

Declaration
protected BaseTripleStore(BaseGraphCollection graphCollection)
Parameters
Type Name Description
BaseGraphCollection graphCollection

Graph Collection to use.

Fields

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_graphs

Collection of Graphs that comprise the Triple Store.

Declaration
protected BaseGraphCollection _graphs
Field Value
Type Description
BaseGraphCollection

Properties

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Graphs

Gets the Collection of Graphs that comprise this Triple Store.

Declaration
public BaseGraphCollection Graphs { get; }
Property Value
Type Description
BaseGraphCollection
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IsEmpty

Gets whether the Triple Store is empty.

Declaration
public virtual bool IsEmpty { get; }
Property Value
Type Description
System.Boolean
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this[Uri]

Gets the Graph with the given URI.

Declaration
[Obsolete("Replaced by this[IRefNode]")]
public IGraph this[Uri graphUri] { get; }
Parameters
Type Name Description
System.Uri graphUri

Graph URI.
Property Value
Type Description
IGraph
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this[IRefNode]

Gets a graph from the triple store.

Declaration
public IGraph this[IRefNode graphName] { get; }
Parameters
Type Name Description
IRefNode graphName

The name of the graph to be retrieved. May be null to retrieve the default (unnamed) graph.
Property Value
Type Description
IGraph
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Triples

Gets all the Triples in the Triple Store.

Declaration
public IEnumerable<Triple> Triples { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
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UriFactory

Get the preferred URI factory to use when creating URIs in this store.

Declaration
public abstract IUriFactory UriFactory { get; }
Property Value
Type Description
IUriFactory

Methods

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Add(IGraph, bool)

Adds a Graph into the Triple Store using the chosen Merging Behaviour.

Declaration
public virtual bool Add(IGraph g, bool mergeIfExists)
Parameters
Type Name Description
IGraph g

Graph to add.
System.Boolean mergeIfExists

Whether the Graph should be merged with an existing Graph with the same Base Uri.
Returns
Type Description
System.Boolean
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Add(IGraph)

Adds a Graph into the Triple Store.

Declaration
public virtual bool Add(IGraph g)
Parameters
Type Name Description
IGraph g

Graph to add.
Returns
Type Description
System.Boolean
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AddFromUri(Uri, bool, Loader)

Adds a Graph into the Triple Store which is retrieved from the given Uri using the chosen Merging Behaviour.

Declaration
public virtual bool AddFromUri(Uri graphUri, bool mergeIfExists, Loader loader)
Parameters
Type Name Description
System.Uri graphUri

Graph to add.
System.Boolean mergeIfExists

Whether the Graph should be merged with an existing Graph with the same Base Uri.
Loader loader

The loader to use to retrieve and parse remote data.
Returns
Type Description
System.Boolean
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AddFromUri(Uri, bool)

Adds a Graph into the Triple Store which is retrieved from the given Uri using the chosen Merging Behaviour.

Declaration
public virtual bool AddFromUri(Uri graphUri, bool mergeIfExists)
Parameters
Type Name Description
System.Uri graphUri

Graph to add.
System.Boolean mergeIfExists

Whether the Graph should be merged with an existing Graph with the same Base Uri.
Returns
Type Description
System.Boolean
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AddFromUri(Uri)

Adds a Graph into the Triple Store which is retrieved from the given Uri.

Declaration
public virtual bool AddFromUri(Uri graphUri)
Parameters
Type Name Description
System.Uri graphUri

Uri of the Graph to load.
Returns
Type Description
System.Boolean
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AttachEventHandlers(IGraph)

Helper method which attaches the Triple Store's Event Handlers to the relevant events of a Graph.

Declaration
protected void AttachEventHandlers(IGraph g)
Parameters
Type Name Description
IGraph g

Graph.
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DetachEventHandlers(IGraph)

Helper method which detaches the Triple Store's Event Handlers from the relevant events of a Graph.

Declaration
protected void DetachEventHandlers(IGraph g)
Parameters
Type Name Description
IGraph g
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Dispose()

Disposes of the Triple Store.

Declaration
public abstract void Dispose()
Remarks

Derived classes must override this to implement required disposal actions.

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HasGraph(Uri)

Checks whether a Graph with the given Base Uri exists in the Triple Store.

Declaration
[Obsolete("Replaced by HasGraph(IRefNode)")]
public bool HasGraph(Uri graphUri)
Parameters
Type Name Description
System.Uri graphUri

Graph Uri.
Returns
Type Description
System.Boolean

True if the Graph exists in the Triple Store.
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HasGraph(IRefNode)

Checks whether the graph with the given name is in this triple store.

Declaration
public bool HasGraph(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

The name of the graph to check for.
Returns
Type Description
System.Boolean

True if this store contains a graph with the specified name, false otherwise.
Remarks

Pass null forgraphName to check for the default (unnamed) graph.

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OnGraphAdded(object, GraphEventArgs)

Event Handler which handles the Graph Added event from the underlying Graph Collection and raises the Triple Store's Graph Added event.

Declaration
protected virtual void OnGraphAdded(object sender, GraphEventArgs args)
Parameters
Type Name Description
System.Object sender

Sender.
GraphEventArgs args

Graph Event Arguments.
Remarks

Override this method if your Triple Store implementation wishes to take additional actions when a Graph is added to the Store.

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OnGraphChanged(object, GraphEventArgs)

Event Handler which handles the Changed event of the contained Graphs by raising the Triple Store's Graph Changed event.

Declaration
protected virtual void OnGraphChanged(object sender, GraphEventArgs args)
Parameters
Type Name Description
System.Object sender

Sender.
GraphEventArgs args

Graph Event Arguments.
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OnGraphCleared(object, GraphEventArgs)

Event Handler which handles the Cleared event of the contained Graphs by raising the Triple Stores's Graph Cleared event.

Declaration
protected virtual void OnGraphCleared(object sender, GraphEventArgs args)
Parameters
Type Name Description
System.Object sender

Sender.
GraphEventArgs args

Graph Event Arguments.
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OnGraphMerged(object, GraphEventArgs)

Event Handler which handles the Merged event of the contained Graphs by raising the Triple Store's Graph Merged event.

Declaration
protected virtual void OnGraphMerged(object sender, GraphEventArgs args)
Parameters
Type Name Description
System.Object sender

Sender.
GraphEventArgs args

Graph Event Arguments.
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OnGraphRemoved(object, GraphEventArgs)

Event Handler which handles the Graph Removed event from the underlying Graph Collection and raises the Triple Stores's Graph Removed event.

Declaration
protected virtual void OnGraphRemoved(object sender, GraphEventArgs args)
Parameters
Type Name Description
System.Object sender

Sender.
GraphEventArgs args

Graph Event Arguments.
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RaiseGraphAdded(GraphEventArgs)

Helper method for raising the Graph Added event manually.

Declaration
protected void RaiseGraphAdded(GraphEventArgs args)
Parameters
Type Name Description
GraphEventArgs args

Graph Event Arguments.
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RaiseGraphAdded(IGraph)

Helper method for raising the Graph Added event manually.

Declaration
protected void RaiseGraphAdded(IGraph g)
Parameters
Type Name Description
IGraph g

Graph.
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RaiseGraphChanged(GraphEventArgs)

Helper method for raising the Graph Changed event manually.

Declaration
protected void RaiseGraphChanged(GraphEventArgs args)
Parameters
Type Name Description
GraphEventArgs args

Graph Event Arguments.
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RaiseGraphChanged(IGraph)

Helper method for raising the Graph Changed event manually.

Declaration
protected void RaiseGraphChanged(IGraph g)
Parameters
Type Name Description
IGraph g

Graph.
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RaiseGraphCleared(GraphEventArgs)

Helper method for raising the Graph Cleared event manually.

Declaration
protected void RaiseGraphCleared(GraphEventArgs args)
Parameters
Type Name Description
GraphEventArgs args

Graph Event Arguments.
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RaiseGraphMerged(GraphEventArgs)

Helper method for raising the Graph Merged event manually.

Declaration
protected void RaiseGraphMerged(GraphEventArgs args)
Parameters
Type Name Description
GraphEventArgs args

Graph Event Arguments.
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RaiseGraphRemoved(GraphEventArgs)

Helper method for raising the Graph Removed event manually.

Declaration
protected void RaiseGraphRemoved(GraphEventArgs args)
Parameters
Type Name Description
GraphEventArgs args

Graph Event Arguments.
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RaiseGraphRemoved(IGraph)

Helper method for raising the Graph Removed event manually.

Declaration
protected void RaiseGraphRemoved(IGraph g)
Parameters
Type Name Description
IGraph g

Graph.
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Remove(Uri)

Removes a Graph from the Triple Store.

Declaration
[Obsolete("Replaced by Remove(IRefNode)")]
public virtual bool Remove(Uri graphUri)
Parameters
Type Name Description
System.Uri graphUri

Uri of the Graph to Remove.
Returns
Type Description
System.Boolean
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Remove(IRefNode)

Removes a graph from the triple store.

Declaration
public virtual bool Remove(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

The name of the graph to remove.
Returns
Type Description
System.Boolean

True if the operation removed a graph, false if no matching graph was found to remove.

Events

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GraphAdded

Event which is raised when a Graph is added

Declaration
public event TripleStoreEventHandler GraphAdded
Event Type
Type Description
TripleStoreEventHandler
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GraphChanged

Event which is raised when a Graphs contents changes

Declaration
public event TripleStoreEventHandler GraphChanged
Event Type
Type Description
TripleStoreEventHandler
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GraphCleared

Event which is raised when a Graph is cleared

Declaration
public event TripleStoreEventHandler GraphCleared
Event Type
Type Description
TripleStoreEventHandler
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GraphMerged

Event which is raised when a Graph has a merge operation performed on it

Declaration
public event TripleStoreEventHandler GraphMerged
Event Type
Type Description
TripleStoreEventHandler
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GraphRemoved

Event which is raised when a Graph is removed

Declaration
public event TripleStoreEventHandler GraphRemoved
Event Type
Type Description
TripleStoreEventHandler

Implements

System.IDisposable

Extension Methods