Class ArqFunctionFactory

Expression Factory which generates ARQ Function expressions.

Inheritance

object

ArqFunctionFactory

Implements

ISparqlCustomExpressionFactory

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: VDS.RDF.Query.Expressions

Assembly: dotNetRdf.dll

Syntax

public class ArqFunctionFactory : ISparqlCustomExpressionFactory

Remarks

Designed to help provide feature parity with the ARQ query engine contained in Jena.

Fields

ArqFunctionsNamespace

ARQ Function Namespace.

Declaration

public const string ArqFunctionsNamespace = "http://jena.hpl.hp.com/ARQ/function#"

Field Value

Type	Description
string

BNode

Constants for ARQ Graph functions.

Declaration

public const string BNode = "bnode"

Field Value

Type	Description
string

E

Constants for ARQ Numeric functions.

Declaration

public const string E = "e"

Field Value

Type	Description
string

LocalName

Constants for ARQ Graph functions.

Declaration

public const string LocalName = "localname"

Field Value

Type	Description
string

Max

Constants for ARQ Numeric functions.

Declaration

public const string Max = "max"

Field Value

Type	Description
string

Min

Constants for ARQ Numeric functions.

Declaration

public const string Min = "min"

Field Value

Type	Description
string

Namespace

Constants for ARQ Graph functions.

Declaration

public const string Namespace = "namespace"

Field Value

Type	Description
string

Now

Constants for ARQ Miscellaneous functions.

Declaration

public const string Now = "now"

Field Value

Type	Description
string

Pi

Constants for ARQ Numeric functions.

Declaration

public const string Pi = "pi"

Field Value

Type	Description
string

Sha1Sum

Constants for ARQ Miscellaneous functions.

Declaration

public const string Sha1Sum = "sha1sum"

Field Value

Type	Description
string

StrJoin

Constants for ARQ String functions.

Declaration

public const string StrJoin = "strjoin"

Field Value

Type	Description
string

Substr

Constants for ARQ String functions.

Declaration

public const string Substr = "substr"

Field Value

Type	Description
string

Substring

Constants for ARQ String functions.

Declaration

public const string Substring = "substring"

Field Value

Type	Description
string

Properties

AvailableExtensionAggregates

Gets the Extension Aggregate URIs supported by this Factory.

Declaration

public IEnumerable<Uri> AvailableExtensionAggregates { get; }

Property Value

Type	Description
IEnumerable<Uri>

AvailableExtensionFunctions

Gets the Extension Function URIs supported by this Factory.

Declaration

public IEnumerable<Uri> AvailableExtensionFunctions { get; }

Property Value

Type	Description
IEnumerable<Uri>

Methods

TryCreateExpression(Uri, List<ISparqlExpression>, Dictionary<string, ISparqlExpression>, out ISparqlExpression)

Tries to create an ARQ Function expression if the function Uri correseponds to a supported ARQ Function.

Declaration

public bool TryCreateExpression(Uri u, List<ISparqlExpression> args, Dictionary<string, ISparqlExpression> scalarArgs, out ISparqlExpression expr)

Parameters

Type	Name	Description
Uri	u	Function Uri.
List<ISparqlExpression>	args	Function Arguments.
Dictionary<string, ISparqlExpression>	scalarArgs	Scalar Arguments.
ISparqlExpression	expr	Generated Expression.

Returns

Type	Description
bool	Whether an expression was successfully generated.

Implements

ISparqlCustomExpressionFactory

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)