Class BaseSparqlView

Abstract Base class for SPARQL Views which are Graphs which are generated from SPARQL Queries and get automatically updated when the Store they are attached to changes.

Inheritance
object
BaseGraph
Graph
BaseSparqlView
NativeSparqlView
SparqlView
Implements
Inherited Members
Namespace: VDS.RDF.Query
Assembly: dotNetRdf.dll
Syntax
public abstract class BaseSparqlView : Graph, IGraph, INodeFactory, IDisposable, ITripleIndex, IEquatable<IGraph>, IEquatable<Graph>
Remarks

CONSTRUCT, DESCRIBE or SELECT queries can be used to generate a Graph. If you use a SELECT query the returned variables must contain ?s, ?p and ?o in order to generate a view correctly.

Constructors

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BaseSparqlView(string, ITripleStore, IRefNode)

Creates a new SPARQL View.

Declaration
protected BaseSparqlView(string sparqlQuery, ITripleStore store, IRefNode name = null)
Parameters
Type Name Description
string sparqlQuery

SPARQL Query.
ITripleStore store

Triple Store to query.
IRefNode name

The graph name to assign to the view.
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BaseSparqlView(SparqlParameterizedString, ITripleStore, IRefNode)

Creates a new SPARQL View.

Declaration
protected BaseSparqlView(SparqlParameterizedString sparqlQuery, ITripleStore store, IRefNode name = null)
Parameters
Type Name Description
SparqlParameterizedString sparqlQuery

SPARQL Query.
ITripleStore store

Triple Store to query.
IRefNode name

The graph name to assign to the view.
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BaseSparqlView(SparqlQuery, ITripleStore, IRefNode)

Creates a new SPARQL View.

Declaration
protected BaseSparqlView(SparqlQuery sparqlQuery, ITripleStore store, IRefNode name = null)
Parameters
Type Name Description
SparqlQuery sparqlQuery

SPARQL Query.
ITripleStore store

Triple Store to query.
IRefNode name

The graph name to assign to the view.

Fields

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_graphs

Graphs that are mentioned in the Query.

Declaration
protected HashSet<string> _graphs
Field Value
Type Description
HashSet<string>
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_q

SPARQL Query.

Declaration
protected SparqlQuery _q
Field Value
Type Description
SparqlQuery
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_store

Triple Store the query operates over.

Declaration
protected ITripleStore _store
Field Value
Type Description
ITripleStore

Properties

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LastError

Gets the error that occurred during the last update (if any).

Declaration
public RdfQueryException LastError { get; protected set; }
Property Value
Type Description
RdfQueryException

Methods

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UpdateView()

Forces the view to be updated.

Declaration
public void UpdateView()
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UpdateViewInternal()

Abstract method that derived classes should implement to update the view.

Declaration
protected abstract void UpdateViewInternal()

Implements

Extension Methods