Class InMemoryDataset

Represents an in-memory dataset (i.e. a InMemoryQueryableStore) for querying and updating using SPARQL.

Inheritance
System.Object
BaseDataset
BaseTransactionalDataset
InMemoryDataset
Implements
Inherited Members
object.Equals(object)
object.Equals(object, object)
object.GetHashCode()
object.GetType()
object.MemberwiseClone()
object.ReferenceEquals(object, object)
object.ToString()
Namespace: VDS.RDF.Query.Datasets
Assembly: dotNetRdf.dll
Syntax
public class InMemoryDataset : BaseTransactionalDataset, IThreadSafeDataset, ISparqlDataset, ITripleIndex

Constructors

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InMemoryDataset()

Creates a new in-memory dataset using the default in-memory TripleStore as the underlying storage.

Declaration
public InMemoryDataset()
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InMemoryDataset(bool)

Creates a new in-memory dataset using the default in-memory TripleStore as the underlying storage.

Declaration
public InMemoryDataset(bool unionDefaultGraph)
Parameters
Type Name Description
System.Boolean unionDefaultGraph

Whether the Default Graph when no Active/Default Graph is explicitly set should be the union of all Graphs in the Dataset.
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InMemoryDataset(IGraph)

Creates a new in-memory dataset containing initially just the given graph and treating the given graph as the default graph of the dataset.

Declaration
public InMemoryDataset(IGraph g)
Parameters
Type Name Description
IGraph g

Graph.
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InMemoryDataset(IInMemoryQueryableStore, bool)

Creates a new In-Memory dataset.

Declaration
public InMemoryDataset(IInMemoryQueryableStore store, bool unionDefaultGraph)
Parameters
Type Name Description
IInMemoryQueryableStore store

In-Memory queryable store.
System.Boolean unionDefaultGraph

Whether the Default Graph when no Active/Default Graph is explicitly set should be the union of all Graphs in the Dataset.
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InMemoryDataset(IInMemoryQueryableStore, IRefNode)

Creates a new In-Memory dataset.

Declaration
public InMemoryDataset(IInMemoryQueryableStore store, IRefNode defaultGraphName)
Parameters
Type Name Description
IInMemoryQueryableStore store

In-Memory queryable store.
IRefNode defaultGraphName

Default Graph URI.
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InMemoryDataset(IInMemoryQueryableStore)

Creates a new In-Memory dataset.

Declaration
public InMemoryDataset(IInMemoryQueryableStore store)
Parameters
Type Name Description
IInMemoryQueryableStore store

In-Memory queryable store.

Properties

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GraphNames

Gets an enumeration of the names of all graphs in the dataset.

Declaration
public override IEnumerable<IRefNode> GraphNames { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><IRefNode>
Overrides
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Graphs

Gets all the Graphs in the Dataset.

Declaration
public override IEnumerable<IGraph> Graphs { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><IGraph>
Overrides
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GraphUris

Gets all the URIs of Graphs in the Dataset.

Declaration
[Obsolete("Replaced by GraphNames")]
public override IEnumerable<Uri> GraphUris { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><System.Uri>
Overrides
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Lock

Gets the Lock used to ensure MRSW concurrency on the dataset when available.

Declaration
public ReaderWriterLockSlim Lock { get; }
Property Value
Type Description
System.Threading.ReaderWriterLockSlim

Methods

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AddGraphInternal(IGraph)

Adds a Graph to the Dataset merging it with any existing Graph with the same URI.

Declaration
protected override bool AddGraphInternal(IGraph g)
Parameters
Type Name Description
IGraph g

Graph.
Returns
Type Description
System.Boolean
Overrides
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ContainsQuotedTripleInternal(Triple)

Declaration
protected override bool ContainsQuotedTripleInternal(Triple t)
Parameters
Type Name Description
Triple t
Returns
Type Description
System.Boolean
Overrides
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ContainsTripleInternal(Triple)

Gets whether the Dataset contains a specific Triple.

Declaration
protected override bool ContainsTripleInternal(Triple t)
Parameters
Type Name Description
Triple t

Triple.
Returns
Type Description
System.Boolean
Overrides
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FlushInternal()

If there have been changes made to the Dataset and the underlying in-memory store is a ITransactionalStore ensures the underlying store is notified to flush those changes.

Declaration
protected override void FlushInternal()
Overrides
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GetAllQuotedTriples()

Declaration
protected override IEnumerable<Triple> GetAllQuotedTriples()
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetAllTriples()

Gets all the Triples in the underlying in-memory store.

Declaration
protected override IEnumerable<Triple> GetAllTriples()
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetGraphInternal(IRefNode)

Gets the Graph with the given URI from the Dataset.

Declaration
protected override IGraph GetGraphInternal(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

Graph URI.
Returns
Type Description
IGraph
Overrides
Remarks

For In-Memory datasets the Graph returned from this property is no different from the Graph returned by the GetModifiableGraphInternal() method.

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GetModifiableGraphInternal(IRefNode)

Gets a Modifiable wrapper around a Graph in the Dataset.

Declaration
protected override ITransactionalGraph GetModifiableGraphInternal(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

Graph URI.
Returns
Type Description
ITransactionalGraph
Overrides
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GetQuotedWithObjectInternal(INode)

Declaration
protected override IEnumerable<Triple> GetQuotedWithObjectInternal(INode obj)
Parameters
Type Name Description
INode obj
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetQuotedWithPredicateInternal(INode)

Declaration
protected override IEnumerable<Triple> GetQuotedWithPredicateInternal(INode predicate)
Parameters
Type Name Description
INode predicate
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetQuotedWithPredicateObjectInternal(INode, INode)

Declaration
protected override IEnumerable<Triple> GetQuotedWithPredicateObjectInternal(INode pred, INode obj)
Parameters
Type Name Description
INode pred
INode obj
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetQuotedWithSubjectInternal(INode)

Declaration
protected override IEnumerable<Triple> GetQuotedWithSubjectInternal(INode subj)
Parameters
Type Name Description
INode subj
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetQuotedWithSubjectObjectInternal(INode, INode)

Declaration
protected override IEnumerable<Triple> GetQuotedWithSubjectObjectInternal(INode subj, INode obj)
Parameters
Type Name Description
INode subj
INode obj
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetQuotedWithSubjectPredicateInternal(INode, INode)

Declaration
protected override IEnumerable<Triple> GetQuotedWithSubjectPredicateInternal(INode subj, INode predicate)
Parameters
Type Name Description
INode subj
INode predicate
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetTriplesWithObjectInternal(INode)

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

Declaration
protected override IEnumerable<Triple> GetTriplesWithObjectInternal(INode obj)
Parameters
Type Name Description
INode obj

Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetTriplesWithPredicateInternal(INode)

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

Declaration
protected override IEnumerable<Triple> GetTriplesWithPredicateInternal(INode predicate)
Parameters
Type Name Description
INode predicate

Predicate.
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetTriplesWithPredicateObjectInternal(INode, INode)

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

Declaration
protected override IEnumerable<Triple> GetTriplesWithPredicateObjectInternal(INode pred, INode obj)
Parameters
Type Name Description
INode pred

Predicate.
INode obj

Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetTriplesWithSubjectInternal(INode)

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

Declaration
protected override IEnumerable<Triple> GetTriplesWithSubjectInternal(INode subj)
Parameters
Type Name Description
INode subj

Subject.
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetTriplesWithSubjectObjectInternal(INode, INode)

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

Declaration
protected override IEnumerable<Triple> GetTriplesWithSubjectObjectInternal(INode subj, INode obj)
Parameters
Type Name Description
INode subj

Subject.
INode obj

Object.
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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GetTriplesWithSubjectPredicateInternal(INode, INode)

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

Declaration
protected override IEnumerable<Triple> GetTriplesWithSubjectPredicateInternal(INode subj, INode predicate)
Parameters
Type Name Description
INode subj

Subject.
INode predicate

Predicate.
Returns
Type Description
System.Collections.Generic.IEnumerable<T><Triple>
Overrides
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HasGraphInternal(IRefNode)

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

Declaration
protected override bool HasGraphInternal(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

Graph name.
Returns
Type Description
System.Boolean
Overrides
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RemoveGraphInternal(IRefNode)

Removes a Graph from the Dataset.

Declaration
protected override bool RemoveGraphInternal(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

Graph name.
Returns
Type Description
System.Boolean
Overrides

Implements

Extension Methods