Class UnknownFunction

Represents an Unknown Function that is not supported by dotNetRDF.

Inheritance

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

UnknownFunction(Uri)

Creates a new Unknown Function that has no Arguments.

Declaration

public UnknownFunction(Uri funcUri)

Parameters

Type	Name	Description
Uri	funcUri	Function URI.

UnknownFunction(Uri, IEnumerable<ISparqlExpression>)

Creates a new Unknown Function that has multiple Arguments.

Declaration

public UnknownFunction(Uri funcUri, IEnumerable<ISparqlExpression> argumentExpressions)

Parameters

Type	Name	Description
Uri	funcUri	Function URI.
IEnumerable<ISparqlExpression>	argumentExpressions	Argument Expressions.

UnknownFunction(Uri, ISparqlExpression)

Creates a new Unknown Function that has a Single Argument.

Declaration

public UnknownFunction(Uri funcUri, ISparqlExpression expr)

Parameters

Type	Name	Description
Uri	funcUri	Function URI.
ISparqlExpression	expr	Argument Expression.

Properties

Arguments

Gets the Arguments of the Expression.

Declaration

public IEnumerable<ISparqlExpression> Arguments { get; }

Property Value

Type	Description
IEnumerable<ISparqlExpression>

CanParallelise

Gets whether an expression can safely be evaluated in parallel.

Declaration

public virtual bool CanParallelise { get; }

Property Value

Type	Description
bool

Functor

Gets the Function URI of the Expression.

Declaration

public string Functor { get; }

Property Value

Type	Description
string

Type

Gets the Expression Type.

Declaration

public SparqlExpressionType Type { get; }

Property Value

Type	Description
SparqlExpressionType

Variables

Gets the Variables used in the Function.

Declaration

public IEnumerable<string> Variables { get; }

Property Value

Type	Description
IEnumerable<string>

Methods

Accept<T>(ISparqlExpressionVisitor<T>)

Accept a ISparqlExpressionVisitor<T> by calling the appropriate method on its interface for this expression.

Declaration

public T Accept<T>(ISparqlExpressionVisitor<T> visitor)

Parameters

Type	Name	Description
ISparqlExpressionVisitor<T>	visitor	The visitor to be invoked.

Returns

Type	Description
T	The result of calling the method on the visitor.

Type Parameters

Name	Description
T	Type of result that the called method returns.

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

Accept a ISparqlExpressionProcessor<TResult, TContext, TBinding> by calling the appropriate method on its interface for this expression.

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	The processor to be invoked.
TContext	context	The context object to use for processing.
TBinding	binding	The binding to be processed.

Returns

Type	Description
TResult

Type Parameters

Name	Description
TResult	Type of result that the process method returns.
TContext	The type of the context parameter to the process method.
TBinding	The type of the binding parameter of the process method.

ToString()

Gets the String representation of the Expression.

Declaration

public override string ToString()

Returns

Type	Description
string

Overrides

object.ToString()

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

Implements

ISparqlExpression

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)