Class BaseMultiset

Abstract Base Class for representing Multisets.

Inheritance

object

BaseMultiset

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 abstract class BaseMultiset

Constructors

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BaseMultiset(bool)

Create a new multiset.

Declaration

public BaseMultiset(bool usePLinqEvaluation = true)

Parameters

Type	Name	Description
bool	usePLinqEvaluation	If true, then LINQ parallel operators will be used when evaluating set operations using this multiset.

Fields

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_orderedIDs

List of IDs that is used to return the Sets in order if the Multiset has been sorted.

Declaration

protected List<int> _orderedIDs

Field Value

Type	Description
List<int>

Properties

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Count

Gets the Count of Sets in the Multiset.

Declaration

public virtual int Count { get; }

Property Value

Type	Description
int

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IsEmpty

Returns whether the Multiset is Empty.

Declaration

public abstract bool IsEmpty { get; }

Property Value

Type	Description
bool

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this[int]

Retrieves the Set with the given ID.

Declaration

public abstract ISet this[int id] { get; }

Parameters

Type	Name	Description
int	id	ID.

Property Value

Type	Description
ISet

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SetIDs

Gets the IDs of Sets in the Multiset.

Declaration

public abstract IEnumerable<int> SetIDs { get; }

Property Value

Type	Description
IEnumerable<int>

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Sets

Gets the Sets in the Multiset.

Declaration

public abstract IEnumerable<ISet> Sets { get; }

Property Value

Type	Description
IEnumerable<ISet>

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UsePLinqEvaluation

Get whether this multiset will use LINQ parallel operators for evaluating set operations.

Declaration

public bool UsePLinqEvaluation { get; }

Property Value

Type	Description
bool

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Variables

Gets the Variables in the Multiset.

Declaration

public abstract IEnumerable<string> Variables { get; }

Property Value

Type	Description
IEnumerable<string>

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VirtualCount

The number of results that would be returned without any limit clause to a query or -1 if not supported. Defaults to the same value as the Count member.

Declaration

public int VirtualCount { get; }

Property Value

Type	Description
int

Methods

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Add(ISet)

Adds a Set to the Multiset.

Declaration

public abstract void Add(ISet s)

Parameters

Type	Name	Description
ISet	s	Set to add.

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AddVariable(string)

Adds a Variable to the Multiset.

Declaration

public abstract void AddVariable(string variable)

Parameters

Type	Name	Description
string	variable	Variable.

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ContainsValue(string, INode)

Determines whether the Multiset contains the given Value for the given Variable.

Declaration

public abstract bool ContainsValue(string var, INode n)

Parameters

Type	Name	Description
string	var	Variable.
INode	n	Value.

Returns

Type	Description
bool

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ContainsVariable(string)

Determines whether the Multiset contains the given Variable.

Declaration

public abstract bool ContainsVariable(string var)

Parameters

Type	Name	Description
string	var	Variable.

Returns

Type	Description
bool

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ContainsVariables(IEnumerable<string>)

Determines whether the Multiset contains all of the given variables.

Declaration

public abstract bool ContainsVariables(IEnumerable<string> vars)

Parameters

Type	Name	Description
IEnumerable<string>	vars	Variables.

Returns

Type	Description
bool	True if all of the variables in `vars` are contained in the multiset, or if `vars` is the empty set.

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ExistsJoin(BaseMultiset, bool)

Does an Exists Join of this Multiset to another Multiset where the Join is predicated on the existence/non-existence of a joinable solution on the RHS.

Declaration

public virtual BaseMultiset ExistsJoin(BaseMultiset other, bool mustExist)

Parameters

Type	Name	Description
BaseMultiset	other	Other Multiset.
bool	mustExist	Whether a solution must exist in the Other Multiset for the join to be made.

Returns

Type	Description
BaseMultiset

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IsDisjointWith(BaseMultiset)

Determines whether the Multiset is disjoint with the given Multiset.

Declaration

public abstract bool IsDisjointWith(BaseMultiset other)

Parameters

Type	Name	Description
BaseMultiset	other	Multiset.

Returns

Type	Description
bool

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Join(BaseMultiset)

Joins this Multiset to another Multiset.

Declaration

public virtual BaseMultiset Join(BaseMultiset other)

Parameters

Type	Name	Description
BaseMultiset	other	Other Multiset.

Returns

Type	Description
BaseMultiset

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LeftJoin(BaseMultiset, ISparqlExpression, SparqlEvaluationContext, ISparqlExpressionProcessor<IValuedNode, SparqlEvaluationContext, int>)

Does a Left Join of this Multiset to another Multiset where the Join is predicated on the given Expression.

Declaration

public virtual BaseMultiset LeftJoin(BaseMultiset other, ISparqlExpression expr, SparqlEvaluationContext baseContext, ISparqlExpressionProcessor<IValuedNode, SparqlEvaluationContext, int> expressionProcessor)

Parameters

Type	Name	Description
BaseMultiset	other	Other Multiset.
ISparqlExpression	expr	Expression.
SparqlEvaluationContext	baseContext	The base evaluation context providing access to the query evaluation options to use when evaluating the join.
ISparqlExpressionProcessor<IValuedNode, SparqlEvaluationContext, int>	expressionProcessor	The processor to use to evaluate `expr`.

Returns

Type	Description
BaseMultiset

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Merge(BaseMultiset)

Does a merge of this multiset and another multiset, avoiding adding duplicate sets to this multiset.

Declaration

public virtual BaseMultiset Merge(BaseMultiset other)

Parameters

Type	Name	Description
BaseMultiset	other	The multiset to be merged into this multiset.

Returns

Type	Description
BaseMultiset	This multiset.

Remarks

The merge operation adds only sets from other that do not exist in this multiset.

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MinusJoin(BaseMultiset)

Does a Minus Join of this Multiset to another Multiset where any joinable results are subtracted from this Multiset to give the resulting Multiset.

Declaration

public virtual BaseMultiset MinusJoin(BaseMultiset other)

Parameters

Type	Name	Description
BaseMultiset	other	Other Multiset.

Returns

Type	Description
BaseMultiset

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Product(BaseMultiset)

Does a Product of this Multiset and another Multiset.

Declaration

public virtual BaseMultiset Product(BaseMultiset other)

Parameters

Type	Name	Description
BaseMultiset	other	Other Multiset.

Returns

Type	Description
BaseMultiset

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Remove(int)

Removes a Set (by ID) from the Multiset.

Declaration

public abstract void Remove(int id)

Parameters

Type	Name	Description
int	id	ID.

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SetVariableOrder(IEnumerable<string>)

Sets the variable ordering for the multiset.

Declaration

public abstract void SetVariableOrder(IEnumerable<string> variables)

Parameters

Type	Name	Description
IEnumerable<string>	variables	Variable Ordering.

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Sort(IComparer<ISet>)

Sorts a Set based on the given Comparer.

Declaration

public virtual void Sort(IComparer<ISet> comparer)

Parameters

Type	Name	Description
IComparer<ISet>	comparer	Comparer on Sets.

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ToString()

Gets the string representation of the multiset (intended for debugging only).

Declaration

public override string ToString()

Returns

Type	Description
string

Overrides

object.ToString()

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Trim()

Trims the Multiset of Temporary Variables.

Declaration

public virtual void Trim()

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Trim(string)

Trims the Multiset by removing all Values for the given Variable.

Declaration

public virtual void Trim(string variable)

Parameters

Type	Name	Description
string	variable	Variable.

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Union(BaseMultiset)

Does a Union of this Multiset and another Multiset.

Declaration

public virtual BaseMultiset Union(BaseMultiset other)

Parameters

Type	Name	Description
BaseMultiset	other	Other Multiset.

Returns

Type	Description
BaseMultiset

Extension Methods

Extensions.ToSafeString(object)

Extensions.AsEnumerable<T>(T)

AlgebraExtensions.ProductWithTimeout(BaseMultiset, BaseMultiset, long)