Class PagingHandler
A RDF Handler which wraps another handler passing only the chunk of triples falling within a given limit and offset to the underlying Handler.
Inherited Members
Namespace: VDS.RDF.Parsing.Handlers
Assembly: dotNetRdf.dll
Syntax
public class PagingHandler : BaseRdfHandler, ICommentRdfHandler, IWrappingRdfHandler, IRdfHandler, INodeFactoryRemarks
This handler does not guarantee that you will receive exactly the chunk specified by the limit and offset for two reasons:.
- It does not perform any sort of data de-duplication so it is possible that if this handler receives duplicate triples and the underlying handler performs de-duplication then you may see less triples than you expect in your final output since although the underlying handler will receive at most the specified chunk size of triples it may not retain them all
- If there are fewer triples than the chunk size or if the chunk exceeds the bounds of the data then you will only receive the triples that fall within the chunk (if any)
Constructors
| Edit this page View SourcePagingHandler(IRdfHandler, int)
Creates a new Paging Handler.
Declaration
public PagingHandler(IRdfHandler handler, int limit)Parameters
| Type | Name | Description |
|---|---|---|
| IRdf |
handler | Inner Handler to use. |
| int | limit | Limit. |
PagingHandler(IRdfHandler, int, int)
Creates a new Paging Handler.
Declaration
public PagingHandler(IRdfHandler handler, int limit, int offset)Parameters
| Type | Name | Description |
|---|---|---|
| IRdf |
handler | Inner Handler to use. |
| int | limit | Limit. |
| int | offset | Offset. |
Remarks
If you just want to use an offset and not apply a limit then set limit to be less than zero.
Properties
| Edit this page View SourceAcceptsAll
Gets whether the Handler will accept all Triples based on its Limit setting.
Declaration
public override bool AcceptsAll { get; }Property Value
| Type | Description |
|---|---|
| bool |
Overrides
| Edit this page View SourceInnerHandlers
Gets the Inner Handler wrapped by this Handler.
Declaration
public IEnumerable<IRdfHandler> InnerHandlers { get; }Property Value
| Type | Description |
|---|---|
| IEnumerable<IRdf |
Methods
| Edit this page View SourceEndRdfInternal(bool)
Ends RDF Handler.
Declaration
protected override void EndRdfInternal(bool ok)Parameters
| Type | Name | Description |
|---|---|---|
| bool | ok | Indicated whether parsing completed without error. |
Overrides
| Edit this page View SourceHandleBaseUriInternal(Uri)
Handles Base URI Declarations by allowing the inner handler to handle it.
Declaration
protected override bool HandleBaseUriInternal(Uri baseUri)Parameters
| Type | Name | Description |
|---|---|---|
| Uri | baseUri | Base URI. |
Returns
| Type | Description |
|---|---|
| bool |
Overrides
| Edit this page View SourceHandleNamespaceInternal(string, Uri)
Handles Namespace Declarations by allowing the inner handler to handle it.
Declaration
protected override bool HandleNamespaceInternal(string prefix, Uri namespaceUri)Parameters
Returns
| Type | Description |
|---|---|
| bool |
Overrides
| Edit this page View SourceHandleQuadInternal(Triple, IRefNode)
Handles a quad by passing it to the Inner Handler only if the Offset has been passed and the Limit has yet to be reached.
Declaration
protected override bool HandleQuadInternal(Triple t, IRefNode graph)Parameters
Returns
| Type | Description |
|---|---|
| bool |
Overrides
Remarks
Terminates handling immediately upon the reaching of the limit.
HandleTripleInternal(Triple)
Handles a Triple by passing it to the Inner Handler only if the Offset has been passed and the Limit has yet to be reached.
Declaration
protected override bool HandleTripleInternal(Triple t)Parameters
| Type | Name | Description |
|---|---|---|
| Triple | t | Triple. |
Returns
| Type | Description |
|---|---|
| bool |
Overrides
Remarks
Terminates handling immediately upon the reaching of the limit.
StartRdfInternal()
Starts RDF Handler.
Declaration
protected override void StartRdfInternal()