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Class UnknownFunction

Represents an Unknown Function that is not supported by dotNetRDF.

Inheritance
System.Object
UnknownFunction
Implements
ISparqlExpression
Inherited Members
object.Equals(object)
object.Equals(object, object)
object.GetHashCode()
object.GetType()
object.MemberwiseClone()
object.ReferenceEquals(object, object)
Namespace: VDS.RDF.Query.Expressions.Functions
Assembly: dotNetRdf.dll
Syntax
public class UnknownFunction : ISparqlExpression
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

Constructors

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UnknownFunction(Uri, IEnumerable<ISparqlExpression>)

Creates a new Unknown Function that has multiple Arguments.

Declaration
public UnknownFunction(Uri funcUri, IEnumerable<ISparqlExpression> exprs)
Parameters
Type Name Description
System.Uri funcUri

Function URI.

System.Collections.Generic.IEnumerable<T><ISparqlExpression> exprs

Argument Expressions.

Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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UnknownFunction(Uri, ISparqlExpression)

Creates a new Unknown Function that has a Single Argument.

Declaration
public UnknownFunction(Uri funcUri, ISparqlExpression expr)
Parameters
Type Name Description
System.Uri funcUri

Function URI.

ISparqlExpression expr

Argument Expression.

Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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UnknownFunction(Uri)

Creates a new Unknown Function that has no Arguments.

Declaration
public UnknownFunction(Uri funcUri)
Parameters
Type Name Description
System.Uri funcUri

Function URI.

Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

Properties

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Arguments

Gets the Arguments of the Expression.

Declaration
public IEnumerable<ISparqlExpression> Arguments { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><ISparqlExpression>
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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CanParallelise

Gets whether an expression can safely be evaluated in parallel.

Declaration
public virtual bool CanParallelise { get; }
Property Value
Type Description
System.Boolean
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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Functor

Gets the Function URI of the Expression.

Declaration
public string Functor { get; }
Property Value
Type Description
string
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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Type

Gets the Expression Type.

Declaration
public SparqlExpressionType Type { get; }
Property Value
Type Description
SparqlExpressionType
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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Variables

Gets the Variables used in the Function.

Declaration
public IEnumerable<string> Variables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><string>
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

Methods

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Accept<T>(ISparqlExpressionVisitor<T>)

Declaration
public T Accept<T>(ISparqlExpressionVisitor<T> visitor)
Parameters
Type Name Description
ISparqlExpressionVisitor<T> visitor
Returns
Type Description
T
Type Parameters
Name Description
T
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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Accept<TResult, TContext, TBinding>(ISparqlExpressionProcessor<TResult, TContext, TBinding>, TContext, TBinding)

Declaration
public TResult Accept<TResult, TContext, TBinding>(ISparqlExpressionProcessor<TResult, TContext, TBinding> processor, TContext context, TBinding binding)
Parameters
Type Name Description
ISparqlExpressionProcessor<TResult, TContext, TBinding> processor
TContext context
TBinding binding
Returns
Type Description
TResult
Type Parameters
Name Description
TResult
TContext
TBinding
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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ToString()

Gets the String representation of the Expression.

Declaration
public override string ToString()
Returns
Type Description
string
Overrides
object.ToString()
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

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Transform(IExpressionTransformer)

Transforms the Expression using the given Transformer.

Declaration
public ISparqlExpression Transform(IExpressionTransformer transformer)
Parameters
Type Name Description
IExpressionTransformer transformer

Expression Transformer.

Returns
Type Description
ISparqlExpression
Remarks

This exists as a placeholder class so users may choose to parse Unknown Functions and have them appear in queries even if they cannot be evaluated. This is useful when you wish to parse a query locally to check syntactic validity before passing it to an external query processor which may understand how to evaluate the function. Using this placeholder also allows queries containing Unknown Functions to still be formatted properly.

Implements

ISparqlExpression

Extension Methods

Extensions.ToSafeString(object)
Extensions.AsEnumerable<T>(T)
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In This Article
  • Constructors
    • UnknownFunction(Uri, IEnumerable<ISparqlExpression>)
    • UnknownFunction(Uri, ISparqlExpression)
    • UnknownFunction(Uri)
  • Properties
    • Arguments
    • CanParallelise
    • Functor
    • Type
    • Variables
  • Methods
    • Accept<T>(ISparqlExpressionVisitor<T>)
    • Accept<TResult, TContext, TBinding>(ISparqlExpressionProcessor<TResult, TContext, TBinding>, TContext, TBinding)
    • ToString()
    • Transform(IExpressionTransformer)
  • Implements
  • Extension Methods
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