Class BaseQuadDataset

Abstract Base class of dataset designed around out of memory datasets where you rarely wish to load data into memory but simply wish to know which graph to look in for data.
Inheritance
System.Object
BaseQuadDataset
BaseImmutableQuadDataset
BaseTransactionalQuadDataset
Implements
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 BaseQuadDataset : ISparqlDataset

Constructors

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BaseQuadDataset()

Creates a new Quad Dataset.
Declaration
public BaseQuadDataset()
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BaseQuadDataset(Boolean)

Creates a new Quad Dataset.
Declaration
public BaseQuadDataset(bool unionDefaultGraph)
Parameters
Type Name Description
System.Boolean unionDefaultGraph Whether to make the default graph the union of all graphs.
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BaseQuadDataset(Uri)

Creates a new Quad Dataset.
Declaration
public BaseQuadDataset(Uri defaultGraphUri)
Parameters
Type Name Description
System.Uri defaultGraphUri URI of the Default Graph.

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 the Graphs in the dataset.
Declaration
public virtual IEnumerable<IGraph> Graphs { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<IGraph>
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GraphUris

Gets the URIs of the 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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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 triples from the dataset.
Declaration
public IEnumerable<Triple> Triples { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<Triple>
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UsesUnionDefaultGraph

Gets whether this dataset uses a union default graph.
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 virtual bool AddGraph(IGraph g)
Parameters
Type Name Description
IGraph g Graph.
Returns
Type Description
System.Boolean
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AddQuad(Uri, Triple)

Adds a Quad to the Dataset.
Declaration
protected abstract bool AddQuad(Uri graphUri, Triple t)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
Triple t Triple.
Returns
Type Description
System.Boolean
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ContainsQuad(Uri, Triple)

Gets whether a Triple exists in a specific Graph of the dataset.
Declaration
protected abstract bool ContainsQuad(Uri graphUri, Triple t)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
Triple t Triple.
Returns
Type Description
System.Boolean
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ContainsTriple(Triple)

Gets whether the dataset contains a triple.
Declaration
public bool ContainsTriple(Triple t)
Parameters
Type Name Description
Triple t Triple.
Returns
Type Description
System.Boolean
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Discard()

Discards any changes to the dataset.
Declaration
public virtual void Discard()
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Flush()

Flushes any changes to the dataset.
Declaration
public virtual void Flush()
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GetGraphInternal(Uri)

Gets a 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 a modifiable graph from the dataset.
Declaration
public virtual IGraph GetModifiableGraph(Uri graphUri)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
Returns
Type Description
IGraph
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GetQuads(Uri)

Gets all the Triples for a specific graph of the dataset.
Declaration
protected abstract IEnumerable<Triple> GetQuads(Uri graphUri)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
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GetQuadsWithObject(Uri, INode)

Gets all the Triples with a given object from a specific graph of the dataset.
Declaration
protected abstract IEnumerable<Triple> GetQuadsWithObject(Uri graphUri, INode obj)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
INode obj Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
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GetQuadsWithPredicate(Uri, INode)

Gets all the Triples with a given predicate from a specific graph of the dataset.
Declaration
protected abstract IEnumerable<Triple> GetQuadsWithPredicate(Uri graphUri, INode pred)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
INode pred Predicate.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
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GetQuadsWithPredicateObject(Uri, INode, INode)

Gets all the Triples with a given predicate and object from a specific graph of the dataset.
Declaration
protected abstract IEnumerable<Triple> GetQuadsWithPredicateObject(Uri graphUri, INode pred, INode obj)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
INode pred Predicate.
INode obj Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
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GetQuadsWithSubject(Uri, INode)

Gets all the Triples with a given subject from a specific graph of the dataset.
Declaration
protected abstract IEnumerable<Triple> GetQuadsWithSubject(Uri graphUri, INode subj)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
INode subj Subject.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
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GetQuadsWithSubjectObject(Uri, INode, INode)

Gets all the Triples with a given subject and object from a specific graph of the dataset.
Declaration
protected abstract IEnumerable<Triple> GetQuadsWithSubjectObject(Uri graphUri, INode subj, INode obj)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
INode subj Subject.
INode obj Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
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GetQuadsWithSubjectPredicate(Uri, INode, INode)

Gets all the Triples with a given subject and predicate from a specific graph of the dataset.
Declaration
protected abstract IEnumerable<Triple> GetQuadsWithSubjectPredicate(Uri graphUri, INode subj, INode pred)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
INode subj Subject.
INode pred Predicate.
Returns
Type Description
System.Collections.Generic.IEnumerable<Triple>
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GetTriplesWithObject(INode)

Gets all the Triples with a 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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GetTriplesWithPredicate(INode)

Gets all the Triples with a 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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GetTriplesWithPredicateObject(INode, INode)

Gets all the Triples with a 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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GetTriplesWithSubject(INode)

Gets all the Triples with a 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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GetTriplesWithSubjectObject(INode, INode)

Gets all the Triples with a 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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GetTriplesWithSubjectPredicate(INode, INode)

Gets all the Triples with a 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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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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IsDefaultGraph(Uri)

Gets whether the given URI represents the default graph of the dataset.
Declaration
protected bool IsDefaultGraph(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 abstract bool RemoveGraph(Uri graphUri)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
Returns
Type Description
System.Boolean
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RemoveQuad(Uri, Triple)

Removes a Quad from the Dataset.
Declaration
protected abstract bool RemoveQuad(Uri graphUri, Triple t)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
Triple t Triple.
Returns
Type Description
System.Boolean
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ResetActiveGraph()

Resets the Active Graph.
Declaration
public void ResetActiveGraph()
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ResetDefaultGraph()

Resets the Default Graph.
Declaration
public void ResetDefaultGraph()
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SetActiveGraph(IEnumerable<Uri>)

Sets the Active Graph.
Declaration
public void SetActiveGraph(IEnumerable<Uri> graphUris)
Parameters
Type Name Description
System.Collections.Generic.IEnumerable<System.Uri> graphUris Graph URIs.
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SetActiveGraph(Uri)

Sets the Active Graph.
Declaration
public void SetActiveGraph(Uri graphUri)
Parameters
Type Name Description
System.Uri graphUri Graph URI.
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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

Extension Methods