Class SubstringFunction

Represents the XPath fn:substring() function.

Inheritance

object

SubstringFunction

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.XPath.String

Assembly: dotNetRdf.dll

Syntax

public class SubstringFunction : ISparqlExpression

Constructors

SubstringFunction(ISparqlExpression, ISparqlExpression)

Creates a new XPath Substring function.

Declaration

public SubstringFunction(ISparqlExpression stringExpr, ISparqlExpression startExpr)

Parameters

Type	Name	Description
ISparqlExpression	stringExpr	Expression.
ISparqlExpression	startExpr	Start.

SubstringFunction(ISparqlExpression, ISparqlExpression, ISparqlExpression)

Creates a new XPath Substring function.

Declaration

public SubstringFunction(ISparqlExpression stringExpr, ISparqlExpression startExpr, ISparqlExpression lengthExpr)

Parameters

Type	Name	Description
ISparqlExpression	stringExpr	Expression.
ISparqlExpression	startExpr	Start.
ISparqlExpression	lengthExpr	Length.

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 Functor of the Expression.

Declaration

public string Functor { get; }

Property Value

Type	Description
string

InnerExpression

Expression that returns the string to perform the substring operation on.

Declaration

public ISparqlExpression InnerExpression { get; }

Property Value

Type	Description
ISparqlExpression

LengthExpression

Get the expression that returns the length of substring for the operation to return.

Declaration

public ISparqlExpression LengthExpression { get; }

Property Value

Type	Description
ISparqlExpression

StartExpression

Get the expression that returns the start index of the substring operation.

Declaration

public ISparqlExpression StartExpression { get; }

Property Value

Type	Description
ISparqlExpression

Type

Gets the Type of the Expression.

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 function.

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)