Class LazyBgp

Represents a BGP which is a set of Triple Patterns.

Inheritance
System.Object
Bgp
LazyBgp
Implements
Inherited Members
object.Equals(object)
object.Equals(object, object)
object.GetHashCode()
object.GetType()
object.MemberwiseClone()
object.ReferenceEquals(object, object)
Namespace: VDS.RDF.Query.Algebra
Assembly: dotNetRdf.dll
Syntax
public class LazyBgp : Bgp, IBgp, ITerminalOperator, ISparqlAlgebra, IVisitable, IProcessable
Remarks

A Lazy BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for queries where we are only want to retrieve a limited number of solutions.

A Lazy BGP can only contain concrete Triple Patterns and/or FILTERs and not any of other the specialised Triple Pattern classes.

Constructors

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LazyBgp(IEnumerable<ITriplePattern>, int)

Creates a Streamed BGP containing a set of Triple Patterns.

Declaration
public LazyBgp(IEnumerable<ITriplePattern> ps, int requiredResults)
Parameters
Type Name Description
System.Collections.Generic.IEnumerable<T><ITriplePattern> ps

Triple Patterns.
int requiredResults

The number of Results the BGP should attempt to return.
Remarks

A Lazy BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for queries where we are only want to retrieve a limited number of solutions.

A Lazy BGP can only contain concrete Triple Patterns and/or FILTERs and not any of other the specialised Triple Pattern classes.

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LazyBgp(IEnumerable<ITriplePattern>)

Creates a Streamed BGP containing a set of Triple Patterns.

Declaration
public LazyBgp(IEnumerable<ITriplePattern> ps)
Parameters
Type Name Description
System.Collections.Generic.IEnumerable<T><ITriplePattern> ps

Triple Patterns.
Remarks

A Lazy BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for queries where we are only want to retrieve a limited number of solutions.

A Lazy BGP can only contain concrete Triple Patterns and/or FILTERs and not any of other the specialised Triple Pattern classes.

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LazyBgp(ITriplePattern, int)

Creates a Streamed BGP containing a single Triple Pattern.

Declaration
public LazyBgp(ITriplePattern p, int requiredResults)
Parameters
Type Name Description
ITriplePattern p

Triple Pattern.
int requiredResults

The number of Results the BGP should attempt to return.
Remarks

A Lazy BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for queries where we are only want to retrieve a limited number of solutions.

A Lazy BGP can only contain concrete Triple Patterns and/or FILTERs and not any of other the specialised Triple Pattern classes.

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LazyBgp(ITriplePattern)

Creates a Streamed BGP containing a single Triple Pattern.

Declaration
public LazyBgp(ITriplePattern p)
Parameters
Type Name Description
ITriplePattern p

Triple Pattern.
Remarks

A Lazy BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for queries where we are only want to retrieve a limited number of solutions.

A Lazy BGP can only contain concrete Triple Patterns and/or FILTERs and not any of other the specialised Triple Pattern classes.

Properties

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RequiredResults

Declaration
public int RequiredResults { get; set; }
Property Value
Type Description
int
Remarks

A Lazy BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for queries where we are only want to retrieve a limited number of solutions.

A Lazy BGP can only contain concrete Triple Patterns and/or FILTERs and not any of other the specialised Triple Pattern classes.

Methods

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ToString()

Gets the String representation of the Algebra.

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

A Lazy BGP differs from a BGP in that rather than evaluating each Triple Pattern in turn it evaluates across all Triple Patterns. This is used for queries where we are only want to retrieve a limited number of solutions.

A Lazy BGP can only contain concrete Triple Patterns and/or FILTERs and not any of other the specialised Triple Pattern classes.

Implements

Extension Methods