Class SparqlOperators

Registry of SPARQL Operators.

Inheritance
System.Object
SparqlOperators
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.Operators
Assembly: dotNetRdf.dll
Syntax
public static class SparqlOperators

Methods

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AddOperator(ISparqlOperator)

Registers a new operator.

Declaration
public static void AddOperator(ISparqlOperator op)
Parameters
Type Name Description
ISparqlOperator op

Operator.
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GetOperators()

Gets all registered Operators.

Declaration
public static IEnumerable<ISparqlOperator> GetOperators()
Returns
Type Description
System.Collections.Generic.IEnumerable<T><ISparqlOperator>
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GetOperators(SparqlOperatorType)

Gets all registered operators for the given Operator Type.

Declaration
public static IEnumerable<ISparqlOperator> GetOperators(SparqlOperatorType type)
Parameters
Type Name Description
SparqlOperatorType type

Operator Type.
Returns
Type Description
System.Collections.Generic.IEnumerable<T><ISparqlOperator>
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IsRegistered(ISparqlOperator)

Returns whether the given operator is registered.

Declaration
public static bool IsRegistered(ISparqlOperator op)
Parameters
Type Name Description
ISparqlOperator op

Operator.
Returns
Type Description
System.Boolean
Remarks

Checking is done both by reference and instance type so you can check if an operator is registered even if you don't have the actual reference to the instance that registered.

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RemoveOperator(ISparqlOperator)

Removes the registration of an operator by instance reference.

Declaration
public static void RemoveOperator(ISparqlOperator op)
Parameters
Type Name Description
ISparqlOperator op

Operator Reference.
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RemoveOperatorByType(ISparqlOperator)

Removes the registration of an operator by instance type of the operator.

Declaration
public static void RemoveOperatorByType(ISparqlOperator op)
Parameters
Type Name Description
ISparqlOperator op

Operator.
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Reset()

Resets Operator registry to default state.

Declaration
public static void Reset()
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TryGetOperator(SparqlOperatorType, bool, out ISparqlOperator, params IValuedNode[])

Tries to return the operator which applies for the given inputs.

Declaration
public static bool TryGetOperator(SparqlOperatorType type, bool strict, out ISparqlOperator op, params IValuedNode[] ns)
Parameters
Type Name Description
SparqlOperatorType type

Operator Type.
System.Boolean strict

If true, return only operators specified by the SPARQL specification. If false, also return operators that extend the SPARQL specification.
ISparqlOperator op

Operator.
IValuedNode[] ns

Inputs.
Returns
Type Description
System.Boolean