Class SparqlUpdateEvaluationContext

Evaluation Context for SPARQL Updates evaluated by the libraries Leviathan SPARQL Engine.
Inheritance
System.Object
SparqlUpdateEvaluationContext
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.Update
Assembly: dotNetRDF.dll
Syntax
public class SparqlUpdateEvaluationContext

Constructors

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SparqlUpdateEvaluationContext(ISparqlDataset)

Creates a new SPARQL Update Evaluation Context.
Declaration
public SparqlUpdateEvaluationContext(ISparqlDataset data)
Parameters
Type Name Description
ISparqlDataset data SPARQL Dataset.
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SparqlUpdateEvaluationContext(ISparqlDataset, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext>)

Creates a new SPARQL Update Evaluation Context.
Declaration
public SparqlUpdateEvaluationContext(ISparqlDataset data, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor)
Parameters
Type Name Description
ISparqlDataset data SPARQL Dataset.
ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor Query Processor for WHERE clauses.
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SparqlUpdateEvaluationContext(SparqlUpdateCommandSet, ISparqlDataset)

Creates a new SPARQL Update Evaluation Context.
Declaration
public SparqlUpdateEvaluationContext(SparqlUpdateCommandSet commands, ISparqlDataset data)
Parameters
Type Name Description
SparqlUpdateCommandSet commands Command Set.
ISparqlDataset data SPARQL Dataset.
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SparqlUpdateEvaluationContext(SparqlUpdateCommandSet, ISparqlDataset, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext>)

Creates a new SPARQL Update Evaluation Context.
Declaration
public SparqlUpdateEvaluationContext(SparqlUpdateCommandSet commands, ISparqlDataset data, ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor)
Parameters
Type Name Description
SparqlUpdateCommandSet commands Command Set.
ISparqlDataset data SPARQL Dataset.
ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> processor Query Processor for WHERE clauses.

Properties

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Commands

Gets the Command Set (if any) that this context pertains to.
Declaration
public SparqlUpdateCommandSet Commands { get; }
Property Value
Type Description
SparqlUpdateCommandSet
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Data

Dataset upon which the Updates are applied.
Declaration
public ISparqlDataset Data { get; }
Property Value
Type Description
ISparqlDataset
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QueryProcessor

Gets the Query Processor used to process the WHERE clauses of DELETE or INSERT commands.
Declaration
public ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext> QueryProcessor { get; }
Property Value
Type Description
ISparqlQueryAlgebraProcessor<BaseMultiset, SparqlEvaluationContext>
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RemainingTimeout

Gets the Remaining Timeout i.e. the Timeout taking into account time already elapsed.
Declaration
public long RemainingTimeout { get; }
Property Value
Type Description
System.Int64
Remarks
If there is no timeout then this is always zero, if there is a timeout this is always >= 1 since any operation that wants to respect the timeout must have a non-zero timeout to actually timeout properly.
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UpdateTime

Retrieves the Time in milliseconds the update took to evaluate.
Declaration
public long UpdateTime { get; }
Property Value
Type Description
System.Int64
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UpdateTimeout

Gets the Update Timeout used for the Command Set.
Declaration
public long UpdateTimeout { get; }
Property Value
Type Description
System.Int64
Remarks

This is taken either from the Timeout property of the SparqlUpdateCommandSet to which this evaluation context pertains or from the global option UpdateExecutionTimeout. To set the Timeout to be used set whichever of those is appropriate prior to evaluating the updates. If there is a Command Set present then it's timeout takes precedence unless it is set to zero (no timeout) in which case the global timeout setting is applied. You cannot set the Update Timeout to be higher than the global timeout unless the global timeout is set to zero (i.e. no global timeout).

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UpdateTimeTicks

Retrieves the Time in ticks the updates took to evaluate.
Declaration
public long UpdateTimeTicks { get; }
Property Value
Type Description
System.Int64

Methods

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CheckTimeout()

Checks whether Execution should Time out.
Declaration
public void CheckTimeout()
Exceptions
Type Condition
SparqlUpdateTimeoutException Thrown if the Update has exceeded the Execution Timeout.
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EndExecution()

Ends the Execution Timer.
Declaration
public void EndExecution()
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StartExecution()

Starts the Execution Timer.
Declaration
public void StartExecution()

Extension Methods