Class BaseOrderBy

Base Class for implementing Sparql ORDER BYs.
Inheritance
System.Object
BaseOrderBy
OrderByExpression
OrderByVariable
Implements
System.Collections.Generic.IComparer<ISet>
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: VDS.RDF.Query.Ordering
Assembly: dotNetRDF.dll
Syntax
public abstract class BaseOrderBy : ISparqlOrderBy, IComparer<ISet>

Fields

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_child

Holds the Child Order By (if any).
Declaration
protected ISparqlOrderBy _child
Field Value
Type Description
ISparqlOrderBy
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_context

Stores the Evaluation Context.
Declaration
protected SparqlEvaluationContext _context
Field Value
Type Description
SparqlEvaluationContext
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_modifier

Modifier used to make ordering Descending.
Declaration
protected int _modifier
Field Value
Type Description
System.Int32
Remarks
Implementations derived from this class should multiply their comparison results by the modifier to automatically provide Ascending/Descending order.

Properties

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Child

Gets/Sets the Child Order By.
Declaration
public ISparqlOrderBy Child { get; set; }
Property Value
Type Description
ISparqlOrderBy
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Context

Sets the Evaluation Context for the Ordering.
Declaration
public SparqlEvaluationContext Context { set; }
Property Value
Type Description
SparqlEvaluationContext
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Descending

Sets the Ordering to Descending.
Declaration
public bool Descending { get; set; }
Property Value
Type Description
System.Boolean
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Expression

Gets the Expression used in the Ordering.
Declaration
public abstract ISparqlExpression Expression { get; }
Property Value
Type Description
ISparqlExpression
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IsSimple

Gets whether the Ordering is Simple.
Declaration
public abstract bool IsSimple { get; }
Property Value
Type Description
System.Boolean
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Variables

Gets all the Variables used in the Ordering.
Declaration
public abstract IEnumerable<string> Variables { get; }
Property Value
Type Description
System.Collections.Generic.IEnumerable<System.String>

Methods

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Compare(ISet, ISet)

Abstract Compare method which derived classes should implement their ordering in.
Declaration
public abstract int Compare(ISet x, ISet y)
Parameters
Type Name Description
ISet x A Set.
ISet y A Set.
Returns
Type Description
System.Int32
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GetComparer(IMatchTriplePattern)

Generates a Comparer than can be used to do Ordering based on the given Triple Pattern.
Declaration
public abstract IComparer<Triple> GetComparer(IMatchTriplePattern pattern)
Parameters
Type Name Description
IMatchTriplePattern pattern Triple Pattern.
Returns
Type Description
System.Collections.Generic.IComparer<Triple>
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ToString()

Gets the String representation of the Order By.
Declaration
public abstract override string ToString()
Returns
Type Description
System.String
Overrides
System.Object.ToString()

Implements

System.Collections.Generic.IComparer<T>

Extension Methods