Class TriplePattern

Class for representing Triple Patterns in SPARQL Queries.

Inheritance

System.Object

BaseTriplePattern

TriplePattern

Implements

IMatchTriplePattern

System.IComparable<T><IMatchTriplePattern>

IConstructTriplePattern

ITriplePattern

System.IComparable<T><ITriplePattern>

IProcessable

IVisitable

System.IComparable<T><TriplePattern>

Inherited Members

BaseTriplePattern._vars

BaseTriplePattern.Variables

BaseTriplePattern.CompareTo(ITriplePattern)

BaseTriplePattern.UsesDefaultDataset

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

Namespace: VDS.RDF.Query.Patterns

Assembly: dotNetRdf.dll

Syntax

public class TriplePattern : BaseTriplePattern, IMatchTriplePattern, IComparable<IMatchTriplePattern>, IConstructTriplePattern, ITriplePattern, IComparable<ITriplePattern>, IProcessable, IVisitable, IComparable<TriplePattern>

Constructors

TriplePattern(PatternItem, PatternItem, PatternItem)

Creates a new Triple Pattern.

Declaration

public TriplePattern(PatternItem subj, PatternItem pred, PatternItem obj)

Parameters

Type	Name	Description
PatternItem	subj	Subject Pattern.
PatternItem	pred	Predicate Pattern.
PatternItem	obj	Object Pattern.

Properties

FixedVariables

Returns all variables mentioned as a match guarantees all variables are bound.

Declaration

public override IEnumerable<string> FixedVariables { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<T><string>

Overrides

BaseTriplePattern.FixedVariables

FloatingVariables

Returns an empty enumeration as a match guarantees all variables are bound.

Declaration

public override IEnumerable<string> FloatingVariables { get; }

Property Value

Type	Description
System.Collections.Generic.IEnumerable<T><string>

Overrides

BaseTriplePattern.FloatingVariables

HasNoBlankVariables

Gets whether the Pattern contains no Explicit Variables (i.e. Blank Node Variables are ignored).

Declaration

public override bool HasNoBlankVariables { get; }

Property Value

Type	Description
System.Boolean

Overrides

BaseTriplePattern.HasNoBlankVariables

HasNoExplicitVariables

Gets whether the Pattern contains no Explicit Variables (i.e. Blank Node Variables are ignored).

Declaration

public bool HasNoExplicitVariables { get; }

Property Value

Type	Description
System.Boolean

HasNoVariables

Gets whether the Pattern contains no Variables of any kind.

Declaration

public bool HasNoVariables { get; }

Property Value

Type	Description
System.Boolean

IndexType

Gets the Index Type we will use for this Pattern.

Declaration

public TripleIndexType IndexType { get; }

Property Value

Type	Description
TripleIndexType

IsAcceptAll

Returns whether the Triple Pattern is an accept all.

Declaration

public override bool IsAcceptAll { get; }

Property Value

Type	Description
System.Boolean

Overrides

BaseTriplePattern.IsAcceptAll

Remarks

True if all three Pattern Items are VariablePattern and all the Variables names are distinct.

Object

Object Pattern.

Declaration

public PatternItem Object { get; }

Property Value

Type	Description
PatternItem

PatternType

Gets the pattern type.

Declaration

public override TriplePatternType PatternType { get; }

Property Value

Type	Description
TriplePatternType

Overrides

BaseTriplePattern.PatternType

Predicate

Predicate Pattern.

Declaration

public PatternItem Predicate { get; }

Property Value

Type	Description
PatternItem

Subject

Subject Pattern.

Declaration

public PatternItem Subject { get; }

Property Value

Type	Description
PatternItem

Methods

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

VDS.RDF.Query.Patterns.BaseTriplePattern.Accept<T>(VDS.RDF.Query.ISparqlAlgebraVisitor<T>)

Accept<TResult, TContext>(ISparqlQueryAlgebraProcessor<TResult, TContext>, TContext)

Declaration

public override 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

Overrides

VDS.RDF.Query.Patterns.BaseTriplePattern.Accept<TResult, TContext>(VDS.RDF.Query.ISparqlQueryAlgebraProcessor<TResult, TContext>, TContext)

AsQuotedPatternItem()

Wrap this triple pattern as a quoted triple match pattern.

Declaration

public PatternItem AsQuotedPatternItem()

Returns

Type	Description
PatternItem	A NodeMatchPattern if the subject, predicate and object of this pattern are not variables, A QuotedTriplePattern that wraps this pattern otherwise.

CompareTo(IMatchTriplePattern)

Compares a triple pattern to another.

Declaration

public int CompareTo(IMatchTriplePattern other)

Parameters

Type	Name	Description
IMatchTriplePattern	other	Pattern.

Returns

Type	Description
int

CompareTo(TriplePattern)

Compares a triple pattern to another.

Declaration

public int CompareTo(TriplePattern other)

Parameters

Type	Name	Description
TriplePattern	other	Pattern.

Returns

Type	Description
int

Construct(ConstructContext)

Constructs a Triple from a Set based on this Triple Pattern.

Declaration

public Triple Construct(ConstructContext context)

Parameters

Type	Name	Description
ConstructContext	context	Construct Context.

Returns

Type	Description
Triple

CreateResult(Triple)

Generates a Result Set for a Triple that matches the Pattern.

Declaration

public ISet CreateResult(Triple t)

Parameters

Type	Name	Description
Triple	t	Triple.

Returns

Type	Description
ISet

Evaluate(IPatternEvaluationContext, Triple)

Evaluates a triple match pattern against the given triple.

Declaration

public ISet Evaluate(IPatternEvaluationContext context, Triple obj)

Parameters

Type	Name	Description
IPatternEvaluationContext	context	Evaluation Context.
Triple	obj	Triple to test.

Returns

Type	Description
ISet	A set of variable bindings if the obj matches, null otherwise.

ToString()

Gets the String representation of this Pattern.

Declaration

public override string ToString()

Returns

Type	Description
string

Overrides

BaseTriplePattern.ToString()

Implements

IMatchTriplePattern

System.IComparable<T>

IConstructTriplePattern

ITriplePattern

System.IComparable<T>

IProcessable

IVisitable

System.IComparable<T>

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)