Class Bgp

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 Bgp : IBgp, ITerminalOperator, ISparqlAlgebra, IVisitable, IProcessable

Constructors

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Bgp()

Creates a new empty BGP.

Declaration
public Bgp()
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Bgp(IEnumerable<ITriplePattern>)

Creates a BGP containing a set of Triple Patterns.

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

Triple Patterns.
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Bgp(ITriplePattern)

Creates a BGP containing a single Triple Pattern.

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

Triple Pattern.

Fields

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_triplePatterns

The ordered list of triple patterns that are contained in this BGP.

Declaration
protected readonly List<ITriplePattern> _triplePatterns
Field Value
Type Description
System.Collections.Generic.List<T><ITriplePattern>

Properties

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FixedVariables

Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.

Declaration
public IEnumerable<string> FixedVariables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><string>
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FloatingVariables

Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.

Declaration
public IEnumerable<string> FloatingVariables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><string>
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IsEmpty

Gets whether the BGP is the empty BGP.

Declaration
public bool IsEmpty { get; }
Property Value
Type Description
System.Boolean
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PatternCount

Gets the number of Triple Patterns in the BGP.

Declaration
public int PatternCount { get; }
Property Value
Type Description
int
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TriplePatterns

Gets the Triple Patterns in the BGP.

Declaration
public IReadOnlyList<ITriplePattern> TriplePatterns { get; }
Property Value
Type Description
System.Collections.Generic.IReadOnlyList<T><ITriplePattern>
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Variables

Gets the Variables used in the Algebra.

Declaration
public IEnumerable<string> Variables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<T><string>

Methods

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Accept<T>(ISparqlAlgebraVisitor<T>)

Declaration
public T Accept<T>(ISparqlAlgebraVisitor<T> visitor)
Parameters
Type Name Description
ISparqlAlgebraVisitor<T> visitor
Returns
Type Description
T
Type Parameters
Name Description
T
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Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext>, TContext)

Declaration
public TResult Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext> processor, TContext context)
Parameters
Type Name Description
ISparqlQueryAlgebraProcessor<TResult, TContext> processor
TContext context
Returns
Type Description
TResult
Type Parameters
Name Description
TResult
TContext
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ToGraphPattern()

Converts the BGP to a Graph Pattern.

Declaration
public virtual GraphPattern ToGraphPattern()
Returns
Type Description
GraphPattern
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ToQuery()

Converts the Algebra back to a SPARQL Query.

Declaration
public virtual SparqlQuery ToQuery()
Returns
Type Description
SparqlQuery
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ToString()

Returns the String representation of the BGP.

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

Implements

Extension Methods