Class BaseDataset

Abstract Base Class for Datasets which provides implementation of Active and Default Graph management.

Inheritance

System.Object

BaseDataset

BaseImmutableDataset

BaseTransactionalDataset

Implements

ISparqlDataset

Inherited Members

System.Object.Equals(System.Object)

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.Query.Datasets

Assembly: dotNetRDF.dll

Syntax

public abstract class BaseDataset : ISparqlDataset

Constructors

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BaseDataset()

Creates a new Dataset.

Declaration

public BaseDataset()

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BaseDataset(Boolean)

Creates a new Dataset with the given Union Default Graph setting.

Declaration

public BaseDataset(bool unionDefaultGraph)

Parameters

Type	Name	Description
System.Boolean	unionDefaultGraph	Whether to use a Union Default Graph.

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BaseDataset(Uri)

Creates a new Dataset with a fixed Default Graph and without a Union Default Graph.

Declaration

public BaseDataset(Uri defaultGraphUri)

Parameters

Type	Name	Description
System.Uri	defaultGraphUri

Properties

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ActiveGraphUris

Gets the Active Graph URIs.

Declaration

public IEnumerable<Uri> ActiveGraphUris { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<System.Uri>

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DefaultGraphUris

Gets the Default Graph URIs.

Declaration

public IEnumerable<Uri> DefaultGraphUris { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<System.Uri>

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Graphs

Gets all the Graphs in the Dataset.

Declaration

public abstract IEnumerable<IGraph> Graphs { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<IGraph>

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GraphUris

Gets all the URIs of Graphs in the Dataset.

Declaration

public abstract IEnumerable<Uri> GraphUris { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<System.Uri>

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HasTriples

Gets whether the Dataset has any Triples.

Declaration

public virtual bool HasTriples { get; }

Property Value

Type	Description
System.Boolean

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InternalDefaultGraph

Gets a reference to the actual IGraph that is currently treated as the default graph.

Declaration

protected IGraph InternalDefaultGraph { get; }

Property Value

Type	Description
IGraph

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Item[Uri]

Gets the Graph with the given URI from the Dataset.

Declaration

public virtual IGraph this[Uri graphUri] { get; }

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Property Value

Type	Description
IGraph

Remarks

This property need only return a read-only view of the Graph, code which wishes to modify Graphs should use the GetModifiableGraph(Uri) method to guarantee a Graph they can modify and will be persisted to the underlying storage.

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Triples

Gets all the Triples in the Dataset.

Declaration

public IEnumerable<Triple> Triples { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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UsesUnionDefaultGraph

Gets whether the Default Graph is treated as being the union of all Graphs in the dataset when no Default Graph is otherwise set.

Declaration

public bool UsesUnionDefaultGraph { get; }

Property Value

Type	Description
System.Boolean

Methods

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AddGraph(IGraph)

Adds a Graph to the Dataset.

Declaration

public abstract bool AddGraph(IGraph g)

Parameters

Type	Name	Description
IGraph	g	Graph.

Returns

Type	Description
System.Boolean

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ContainsTriple(Triple)

Gets whether the Dataset contains a specific Triple.

Declaration

public bool ContainsTriple(Triple t)

Parameters

Type	Name	Description
Triple	t	Triple.

Returns

Type	Description
System.Boolean

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ContainsTripleInternal(Triple)

Determines whether the Dataset contains a specific Triple.

Declaration

protected abstract bool ContainsTripleInternal(Triple t)

Parameters

Type	Name	Description
Triple	t	Triple to search for.

Returns

Type	Description
System.Boolean

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Discard()

Ensures that any changes to the Dataset (if any) are discarded.

Declaration

public abstract void Discard()

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Flush()

Ensures that any changes to the Dataset (if any) are flushed to the underlying Storage.

Declaration

public abstract void Flush()

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GetAllTriples()

Abstract method that concrete implementations must implement to return an enumerable of all the Triples in the Dataset.

Declaration

protected abstract IEnumerable<Triple> GetAllTriples()

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetGraphInternal(Uri)

Gets the given Graph from the Dataset.

Declaration

protected abstract IGraph GetGraphInternal(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Returns

Type	Description
IGraph

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GetModifiableGraph(Uri)

Gets the Graph with the given URI from the Dataset.

Declaration

public abstract IGraph GetModifiableGraph(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Returns

Type	Description
IGraph

Remarks

Graphs returned from this method must be modifiable and the Dataset must guarantee that when it is Flushed or Disposed of that any changes to the Graph are persisted.

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GetTriplesWithObject(INode)

Gets all the Triples in the Dataset with the given Object.

Declaration

public IEnumerable<Triple> GetTriplesWithObject(INode obj)

Parameters

Type	Name	Description
INode	obj	Object.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithObjectInternal(INode)

Gets all the Triples in the Dataset with the given Object.

Declaration

protected abstract IEnumerable<Triple> GetTriplesWithObjectInternal(INode obj)

Parameters

Type	Name	Description
INode	obj	Object.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithPredicate(INode)

Gets all the Triples in the Dataset with the given Predicate.

Declaration

public IEnumerable<Triple> GetTriplesWithPredicate(INode pred)

Parameters

Type	Name	Description
INode	pred	Predicate.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithPredicateInternal(INode)

Gets all the Triples in the Dataset with the given Predicate.

Declaration

protected abstract IEnumerable<Triple> GetTriplesWithPredicateInternal(INode pred)

Parameters

Type	Name	Description
INode	pred	Predicate.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithPredicateObject(INode, INode)

Gets all the Triples in the Dataset with the given Predicate and Object.

Declaration

public IEnumerable<Triple> GetTriplesWithPredicateObject(INode pred, INode obj)

Parameters

Type	Name	Description
INode	pred	Predicate.
INode	obj	Object.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithPredicateObjectInternal(INode, INode)

Gets all the Triples in the Dataset with the given Predicate and Object.

Declaration

protected abstract IEnumerable<Triple> GetTriplesWithPredicateObjectInternal(INode pred, INode obj)

Parameters

Type	Name	Description
INode	pred	Predicate.
INode	obj	Object.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithSubject(INode)

Gets all the Triples in the Dataset with the given Subject.

Declaration

public IEnumerable<Triple> GetTriplesWithSubject(INode subj)

Parameters

Type	Name	Description
INode	subj	Subject.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithSubjectInternal(INode)

Gets all the Triples in the Dataset with the given Subject.

Declaration

protected abstract IEnumerable<Triple> GetTriplesWithSubjectInternal(INode subj)

Parameters

Type	Name	Description
INode	subj	Subject.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithSubjectObject(INode, INode)

Gets all the Triples in the Dataset with the given Subject and Object.

Declaration

public IEnumerable<Triple> GetTriplesWithSubjectObject(INode subj, INode obj)

Parameters

Type	Name	Description
INode	subj	Subject.
INode	obj	Object.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithSubjectObjectInternal(INode, INode)

Gets all the Triples in the Dataset with the given Subject and Object.

Declaration

protected abstract IEnumerable<Triple> GetTriplesWithSubjectObjectInternal(INode subj, INode obj)

Parameters

Type	Name	Description
INode	subj	Subject.
INode	obj	Object.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithSubjectPredicate(INode, INode)

Gets all the Triples in the Dataset with the given Subject and Predicate.

Declaration

public IEnumerable<Triple> GetTriplesWithSubjectPredicate(INode subj, INode pred)

Parameters

Type	Name	Description
INode	subj	Subject.
INode	pred	Predicate.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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GetTriplesWithSubjectPredicateInternal(INode, INode)

Gets all the Triples in the Dataset with the given Subject and Predicate.

Declaration

protected abstract IEnumerable<Triple> GetTriplesWithSubjectPredicateInternal(INode subj, INode pred)

Parameters

Type	Name	Description
INode	subj	Subject.
INode	pred	Predicate.

Returns

Type	Description
System.Collections.Generic.IEnumerable<Triple>

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HasGraph(Uri)

Gets whether a Graph with the given URI is the Dataset.

Declaration

public bool HasGraph(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Returns

Type	Description
System.Boolean

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HasGraphInternal(Uri)

Determines whether a given Graph exists in the Dataset.

Declaration

protected abstract bool HasGraphInternal(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Returns

Type	Description
System.Boolean

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RemoveGraph(Uri)

Removes a Graph from the Dataset.

Declaration

public virtual bool RemoveGraph(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Returns

Type	Description
System.Boolean

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RemoveGraphInternal(Uri)

Removes a Graph from the Dataset.

Declaration

protected abstract bool RemoveGraphInternal(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Returns

Type	Description
System.Boolean

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ResetActiveGraph()

Sets the Active Graph for the SPARQL query to be the previous Active Graph.

Declaration

public void ResetActiveGraph()

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ResetDefaultGraph()

Sets the Default Graph for the SPARQL Query to be the previous Default Graph.

Declaration

public void ResetDefaultGraph()

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SetActiveGraph(IEnumerable<Uri>)

Sets the Active Graph for the SPARQL query.

Declaration

public void SetActiveGraph(IEnumerable<Uri> graphUris)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Uri>	graphUris	URIs of the Graphs which form the Active Graph.

Remarks

Helper function used primarily in the execution of GRAPH Clauses.

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SetActiveGraph(Uri)

Sets the Active Graph for the SPARQL query.

Declaration

public void SetActiveGraph(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Uri of the Active Graph.

Remarks

Helper function used primarily in the execution of GRAPH Clauses.

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SetDefaultGraph(IEnumerable<Uri>)

Sets the Default Graph.

Declaration

public void SetDefaultGraph(IEnumerable<Uri> graphUris)

Parameters

Type	Name	Description
System.Collections.Generic.IEnumerable<System.Uri>	graphUris	Graph URIs.

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SetDefaultGraph(Uri)

Sets the Default Graph.

Declaration

public void SetDefaultGraph(Uri graphUri)

Parameters

Type	Name	Description
System.Uri	graphUri	Graph URI.

Implements

ISparqlDataset

Extension Methods

Extensions.AsEnumerable<T>(T)