Class UnionTripleCollection

Represents a union of multiple Triple Collections.

Inheritance
object
BaseTripleCollection
UnionTripleCollection
Implements
Inherited Members
Namespace: VDS.RDF
Assembly: dotNetRdf.dll
Syntax
public class UnionTripleCollection : BaseTripleCollection, IEnumerable<Triple>, IEnumerable, IDisposable
Remarks

The union consists of a Base collection which is the collection that Triples can actually be added to and deleted from and any number of additional collections which are read-only as far as the union is concerned (this does not mean they cannot be altered elsewhere by other code).

Constructors

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UnionTripleCollection(BaseTripleCollection, IEnumerable<BaseTripleCollection>)

Creates a new Union Triple Collection which is a union of any number of collections.

Declaration
public UnionTripleCollection(BaseTripleCollection baseTriples, IEnumerable<BaseTripleCollection> additionalTriples)
Parameters
Type Name Description
BaseTripleCollection baseTriples

Base Triple Collection.
IEnumerable<BaseTripleCollection> additionalTriples

Additional Triple Collection(s).
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UnionTripleCollection(BaseTripleCollection, BaseTripleCollection)

Creates a new Union Triple Collection which is a union of two collections.

Declaration
public UnionTripleCollection(BaseTripleCollection baseTriples, BaseTripleCollection additionalTriples)
Parameters
Type Name Description
BaseTripleCollection baseTriples

Base Triple Collection.
BaseTripleCollection additionalTriples

Additional Triple Collection.

Properties

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Asserted

Gets the triples that are asserted in the collection.

Declaration
public override IEnumerable<Triple> Asserted { get; }
Property Value
Type Description
IEnumerable<Triple>
Overrides
Remarks

This returns the same set of triples as the enumerator on this class, but as an IEnumerable<T> instance.

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Count

Gets the count of Triples in this union.

Declaration
public override int Count { get; }
Property Value
Type Description
int
Overrides
Remarks

The Count is the total number of Triples, this may be different from the number of distinct triples.

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this[Triple]

Retrieves a Triple from the union.

Declaration
public override Triple this[Triple t] { get; }
Parameters
Type Name Description
Triple t

Triple to retrieve.
Property Value
Type Description
Triple
Overrides
Exceptions
Type Condition
KeyNotFoundException

Thrown if the Triple is not contained in any of the collections this union comprises.
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ObjectNodes

Gets the enumeration of distinct objects of Triples.

Declaration
public override IEnumerable<INode> ObjectNodes { get; }
Property Value
Type Description
IEnumerable<INode>
Overrides
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PredicateNodes

Gets the enumeration of distinct predicates of Triples.

Declaration
public override IEnumerable<INode> PredicateNodes { get; }
Property Value
Type Description
IEnumerable<INode>
Overrides
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Quoted

Gets the triples that are quoted in the collection.

Declaration
public override IEnumerable<Triple> Quoted { get; }
Property Value
Type Description
IEnumerable<Triple>
Overrides
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QuotedCount

Gets the number of quoted triples in the triple collection.

Declaration
public override int QuotedCount { get; }
Property Value
Type Description
int
Overrides
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QuotedObjectNodes

Gets all the nodes which are subjects of quoted triples in the triple collection.

Declaration
public override IEnumerable<INode> QuotedObjectNodes { get; }
Property Value
Type Description
IEnumerable<INode>
Overrides
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QuotedPredicateNodes

Gets all the nodes which are predicates of quoted triples in the triple collection.

Declaration
public override IEnumerable<INode> QuotedPredicateNodes { get; }
Property Value
Type Description
IEnumerable<INode>
Overrides
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QuotedSubjectNodes

Gets all the nodes which are objects of quoted triples in the triple collection.

Declaration
public override IEnumerable<INode> QuotedSubjectNodes { get; }
Property Value
Type Description
IEnumerable<INode>
Overrides
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SubjectNodes

Gets the enumeration of distinct subjects of Triples.

Declaration
public override IEnumerable<INode> SubjectNodes { get; }
Property Value
Type Description
IEnumerable<INode>
Overrides

Methods

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Add(Triple)

Adds a Triple to the base collection.

Declaration
protected override bool Add(Triple t)
Parameters
Type Name Description
Triple t

Triple to add.
Returns
Type Description
bool
Overrides
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Contains(Triple)

Checks whether the union contains this Triple in any of the collections it comprises.

Declaration
public override bool Contains(Triple t)
Parameters
Type Name Description
Triple t

Triple to test.
Returns
Type Description
bool
Overrides
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ContainsQuoted(Triple)

Checks whether the specified triple is quoted in any of the collections of the union.

Declaration
public override bool ContainsQuoted(Triple t)
Parameters
Type Name Description
Triple t

Triple to test.
Returns
Type Description
bool
Overrides
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Delete(Triple)

Deletes a Triple from the base collection.

Declaration
protected override bool Delete(Triple t)
Parameters
Type Name Description
Triple t

Triple to delete.
Returns
Type Description
bool
Overrides
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Dispose()

Disposes of the collection.

Declaration
public override void Dispose()
Overrides
Remarks

This does nothing since we don't know where and how the collections we are the union of are being used and therefore to dispose of them could have unwanted/unexpected results.

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GetEnumerator()

Gets the enumeration of Triples in the union.

Declaration
public override IEnumerator<Triple> GetEnumerator()
Returns
Type Description
IEnumerator<Triple>
Overrides

Implements

Extension Methods