Class GraphCollection

Wrapper class for Graph Collections.

Inheritance
object
BaseGraphCollection
GraphCollection
Implements
Inherited Members
Namespace: VDS.RDF
Assembly: dotNetRdf.dll
Syntax
public class GraphCollection : BaseGraphCollection, IDisposable, IEnumerable<IGraph>, IEnumerable

Constructors

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GraphCollection()

Creates a new Graph Collection.

Declaration
public GraphCollection()

Fields

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DefaultGraphId

Internal Constant used as the Hash Code for the default graph.

Declaration
protected const int DefaultGraphId = 0
Field Value
Type Description
int
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_graphs

Dictionary of Graph Uri Enhanced Hash Codes to Graphs.

Declaration
protected MultiDictionary<IRefNode, IGraph> _graphs
Field Value
Type Description
MultiDictionary<IRefNode, IGraph>
Remarks

See GetEnhancedHashCode().

Properties

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Count

Gets the number of Graphs in the Collection.

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

Provides an enumeration of the names of all of teh graphs in the collection.

Declaration
public override IEnumerable<IRefNode> GraphNames { get; }
Property Value
Type Description
IEnumerable<IRefNode>
Overrides
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GraphUris

Provides access to the Graph URIs of Graphs in the Collection.

Declaration
[Obsolete("Replaced by GraphNames")]
public override IEnumerable<Uri> GraphUris { get; }
Property Value
Type Description
IEnumerable<Uri>
Overrides
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this[Uri]

Gets a Graph from the Collection.

Declaration
[Obsolete("Replaced by this[IRefNode]")]
public override IGraph this[Uri graphUri] { get; }
Parameters
Type Name Description
Uri graphUri

Graph Uri.
Property Value
Type Description
IGraph
Overrides
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this[IRefNode]

Gets a graph from the collection.

Declaration
public override IGraph this[IRefNode graphName] { get; }
Parameters
Type Name Description
IRefNode graphName

The name of the graph to retrieve.
Property Value
Type Description
IGraph
Overrides
Remarks

The null value is used to reference the default graph.

Methods

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Add(IGraph, bool)

Adds a Graph to the Collection.

Declaration
public override bool Add(IGraph g, bool mergeIfExists)
Parameters
Type Name Description
IGraph g

Graph to add.
bool mergeIfExists

Sets whether the Graph should be merged with an existing Graph of the same Uri if present.
Returns
Type Description
bool
Overrides
Exceptions
Type Condition
RdfException

Throws an RDF Exception if the Graph has no Base Uri or if the Graph already exists in the Collection and the mergeIfExists parameter was not set to true.
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Contains(Uri)

Checks whether the Graph with the given Uri exists in this Graph Collection.

Declaration
[Obsolete("Replaced by Contains(IRefNode)")]
public override bool Contains(Uri graphUri)
Parameters
Type Name Description
Uri graphUri

Graph Uri to test.
Returns
Type Description
bool
Overrides
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Contains(IRefNode)

Checks whether the graph with the given name exists in this graph collection.

Declaration
public override bool Contains(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

Graph name to test for.
Returns
Type Description
bool

True if a graph with the specified name is in the collection, false otherwise.
Overrides
Remarks

The null value is used to reference the default (unnamed) graph.

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Dispose()

Disposes of the Graph Collection.

Declaration
public override void Dispose()
Overrides
Remarks

Invokes the Dispose() method of all Graphs contained in the Collection.

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GetEnumerator()

Gets the Enumerator for the Collection.

Declaration
public override IEnumerator<IGraph> GetEnumerator()
Returns
Type Description
IEnumerator<IGraph>
Overrides
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Remove(Uri)

Removes a Graph from the Collection.

Declaration
[Obsolete("Replaced by Remove(IRefNode)")]
public override bool Remove(Uri graphUri)
Parameters
Type Name Description
Uri graphUri

Uri of the Graph to remove.
Returns
Type Description
bool
Overrides
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Remove(IRefNode)

Removes a graph from the collection.

Declaration
public override bool Remove(IRefNode graphName)
Parameters
Type Name Description
IRefNode graphName

Name of the Graph to remove.
Returns
Type Description
bool
Overrides
Remarks

The null value is used to reference the Default Graph.

Implements

Extension Methods