Class PropertyFunction

Algebra that represents the application of a Property Function.

Inheritance
object
PropertyFunction
Implements
Inherited Members
Namespace: VDS.RDF.Query.Algebra
Assembly: dotNetRdf.dll
Syntax
public class PropertyFunction : IUnaryOperator, ISparqlAlgebra, IVisitable, IProcessable

Constructors

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PropertyFunction(ISparqlAlgebra, ISparqlPropertyFunction)

Creates a new Property function algebra.

Declaration
public PropertyFunction(ISparqlAlgebra algebra, ISparqlPropertyFunction function)
Parameters
Type Name Description
ISparqlAlgebra algebra

Inner algebra.
ISparqlPropertyFunction function

Property Function.

Properties

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FixedVariables

Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.

Declaration
public IEnumerable<string> FixedVariables { get; }
Property Value
Type Description
IEnumerable<string>
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FloatingVariables

Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.

Declaration
public IEnumerable<string> FloatingVariables { get; }
Property Value
Type Description
IEnumerable<string>
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Function

Gets the function implementation.

Declaration
public ISparqlPropertyFunction Function { get; }
Property Value
Type Description
ISparqlPropertyFunction
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InnerAlgebra

Gets the Inner Algebra.

Declaration
public ISparqlAlgebra InnerAlgebra { get; }
Property Value
Type Description
ISparqlAlgebra
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Variables

Gets the variables used in the algebra.

Declaration
public IEnumerable<string> Variables { get; }
Property Value
Type Description
IEnumerable<string>

Methods

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Accept<T>(ISparqlAlgebraVisitor<T>)

Accept a simple algebra visitor.

Declaration
public T Accept<T>(ISparqlAlgebraVisitor<T> visitor)
Parameters
Type Name Description
ISparqlAlgebraVisitor<T> visitor

The visitor implementation.
Returns
Type Description
T
Type Parameters
Name Description
T

The type returned by the Visit methods of the visitor.
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Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext>, TContext)

Called by an algebra visitor to process an item by invoking the appropriate method on the processor passed in.

Declaration
public TResult Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext> processor, TContext context)
Parameters
Type Name Description
ISparqlQueryAlgebraProcessor<TResult, TContext> processor

The processor to invoke.
TContext context

The context to pass to the processor.
Returns
Type Description
TResult

The result of invoking the processor method.
Type Parameters
Name Description
TResult

The type of result returned by the processor.
TContext

The type of the context object to be provided to the processor.
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ToGraphPattern()

Throws an error because property functions cannot be converted back to graph patterns.

Declaration
public GraphPattern ToGraphPattern()
Returns
Type Description
GraphPattern
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ToQuery()

Throws an error because property functions cannot be converted back to queries.

Declaration
public SparqlQuery ToQuery()
Returns
Type Description
SparqlQuery
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ToString()

Gets the string representation of the algebra.

Declaration
public override string ToString()
Returns
Type Description
string
Overrides
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Transform(IAlgebraOptimiser)

Transforms this algebra with the given optimiser.

Declaration
public ISparqlAlgebra Transform(IAlgebraOptimiser optimiser)
Parameters
Type Name Description
IAlgebraOptimiser optimiser

Optimiser.
Returns
Type Description
ISparqlAlgebra

Implements

Extension Methods