Class TripleCollection

Basic Triple Collection which is not indexed.

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

Fields

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Triples

Underlying Storage of the Triple Collection.

Declaration
protected readonly MultiDictionary<Triple, TripleRefs> Triples
Field Value
Type Description
MultiDictionary<Triple, TripleRefs>

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 number of asserted triples in the triple collection.

Declaration
public override int Count { get; }
Property Value
Type Description
int
Overrides
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this[Triple]

Gets the given Triple.

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 given Triple does not exist in the Triple Collection.
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ObjectNodes

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

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

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

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

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 Collection.

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

Triple to add.
Returns
Type Description
bool
Overrides
Remarks

Adding a Triple that already exists should be permitted though it is not necessary to persist the duplicate to underlying storage.

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AddQuoted(ITripleNode)

Adds a quotation of a triple to the collection.

Declaration
protected void AddQuoted(ITripleNode tripleNode)
Parameters
Type Name Description
ITripleNode tripleNode

The triple node that quotes the triple to be added to the collection.
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Contains(Triple)

Determines whether a given Triple is asserted in the Triple Collection.

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

The Triple to test.
Returns
Type Description
bool

True if the triple exists as an asserted triple in the collection.
Overrides
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ContainsQuoted(Triple)

Determines whether a given triple is quoted by a triple node of a triple in the collection.

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

The triple to test.
Returns
Type Description
bool

True if the triple is quoted in the triple collection, false otherwise.
Overrides
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Delete(Triple)

Deletes a Triple from the Collection.

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

Triple to remove.
Returns
Type Description
bool
Overrides
Remarks

Only asserted triples can be deleted. Deleting something that doesn't exist, or a triple that is only quoted has no effect and gives no error.

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Dispose(bool)

Disposes of a Triple Collection.

Declaration
protected override void Dispose(bool disposing)
Parameters
Type Name Description
bool disposing
Overrides
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GetEnumerator()

Gets the Enumerator for the Collection.

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

Removes a quote reference to a triple from the collection.

Declaration
protected void RemoveQuoted(ITripleNode tripleNode)
Parameters
Type Name Description
ITripleNode tripleNode

The node containing the triple to be 'unquoted'.
Remarks

This method decreases the quote reference count for the triple. If the reference count drops to 0 and the triple is not also asserted in the graph, then it will be removed from the collection. If the triple itself quotes other triples, then this process is applied out recursively.

Implements

Extension Methods