Class BindPattern

Class for representing BIND assignments in SPARQL Queries.

Inheritance
object
BaseTriplePattern
BindPattern
Implements
Inherited Members
Namespace: VDS.RDF.Query.Patterns
Assembly: dotNetRdf.dll
Syntax
public class BindPattern : BaseTriplePattern, IComparable<BindPattern>, IAssignmentPattern, ITriplePattern, IComparable<ITriplePattern>, IProcessable, IVisitable, IComparable<IAssignmentPattern>

Constructors

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BindPattern(string, ISparqlExpression)

Creates a new BIND Pattern.

Declaration
public BindPattern(string var, ISparqlExpression expr)
Parameters
Type Name Description
string var

Variable to assign to.
ISparqlExpression expr

Expression which generates a value which will be assigned to the variable.

Properties

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AssignExpression

Gets the Expression that is used to generate values to be assigned.

Declaration
public ISparqlExpression AssignExpression { get; }
Property Value
Type Description
ISparqlExpression
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FixedVariables

Returns an empty enumeration as any evaluation error will result in an unbound value so we can't guarantee any variables are bound.

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

Returns the variable being assigned to as any evaluation error will result in an unbound value so we can't guarantee it is bound.

Declaration
public override IEnumerable<string> FloatingVariables { get; }
Property Value
Type Description
IEnumerable<string>
Overrides
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HasNoBlankVariables

Returns true as a BIND can never contain a Blank Variable.

Declaration
public override bool HasNoBlankVariables { get; }
Property Value
Type Description
bool
Overrides
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InnerExpression

Get the expressions which generates a value to be assigned to the variable.

Declaration
public ISparqlExpression InnerExpression { get; }
Property Value
Type Description
ISparqlExpression
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IsAcceptAll

Returns that this is not an accept all since it is a BIND assignment.

Declaration
public override bool IsAcceptAll { get; }
Property Value
Type Description
bool
Overrides
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PatternType

Gets the Pattern Type.

Declaration
public override TriplePatternType PatternType { get; }
Property Value
Type Description
TriplePatternType
Overrides
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UsesDefaultDataset

Gets whether the Pattern uses the Default Dataset.

Declaration
public override bool UsesDefaultDataset { get; }
Property Value
Type Description
bool
Overrides
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Variable

Get the variable to assign to.

Declaration
public string Variable { get; }
Property Value
Type Description
string
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VariableName

Gets the Name of the Variable to which values will be assigned.

Declaration
public string VariableName { get; }
Property Value
Type Description
string

Methods

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Accept<T>(ISparqlAlgebraVisitor<T>)

Accept a simple algebra visitor.

Declaration
public override 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.
Overrides
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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 override 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.
Overrides
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CompareTo(BindPattern)

Compares this Bind to another Bind.

Declaration
public int CompareTo(BindPattern other)
Parameters
Type Name Description
BindPattern other

Bind to compare to.
Returns
Type Description
int

Just calls the base compare method since that implements all the logic we need.
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CompareTo(IAssignmentPattern)

Compares this Bind to another Bind.

Declaration
public int CompareTo(IAssignmentPattern other)
Parameters
Type Name Description
IAssignmentPattern other

Bind to compare to.
Returns
Type Description
int

Just calls the base compare method since that implements all the logic we need.
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ToString()

Gets the string representation of the LET assignment.

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

Implements

Extension Methods