LazyBgp Class |
Represents a BGP which is a set of Triple Patterns.
Inheritance HierarchyNamespace: VDS.RDF.Query.Algebra
Assembly: dotNetRDF (in dotNetRDF.dll) Version:
SyntaxThe LazyBgp type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | LazyBgp(IEnumerableITriplePattern) |
Creates a Streamed BGP containing a set of Triple Patterns.
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| LazyBgp(ITriplePattern) |
Creates a Streamed BGP containing a single Triple Pattern.
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| LazyBgp(IEnumerableITriplePattern, Int32) |
Creates a Streamed BGP containing a set of Triple Patterns.
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| LazyBgp(ITriplePattern, Int32) |
Creates a Streamed BGP containing a single Triple Pattern.
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Properties| Name | Description | |
|---|---|---|
 | FixedVariables |
Gets the enumeration of fixed variables in the algebra i.e. variables that are guaranteed to have a bound value.
(Inherited from Bgp.) |
| FloatingVariables |
Gets the enumeration of floating variables in the algebra i.e. variables that are not guaranteed to have a bound value.
(Inherited from Bgp.) |
| IsEmpty |
Gets whether the BGP is the emtpy BGP.
(Inherited from Bgp.) |
| PatternCount |
Gets the number of Triple Patterns in the BGP.
(Inherited from Bgp.) |
| TriplePatterns |
Gets the Triple Patterns in the BGP.
(Inherited from Bgp.) |
| Variables |
Gets the Variables used in the Algebra.
(Inherited from Bgp.) |
Methods| Name | Description | |
|---|---|---|
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| Evaluate |
Evaluates the BGP against the Evaluation Context.
(Overrides BgpEvaluate(SparqlEvaluationContext).) |
 | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
| ToGraphPattern |
Converts the BGP to a Graph Pattern.
(Inherited from Bgp.) |
| ToQuery |
Converts the Algebra back to a SPARQL Query.
(Inherited from Bgp.) |
| ToString |
Gets the String representation of the Algebra.
(Overrides BgpToString.) |
Fields| Name | Description | |
|---|---|---|
 | _triplePatterns |
The ordered list of triple patterns that are contained in this BGP.
(Inherited from Bgp.) |
RemarksA 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.
See Also