Class QuerySourceRdfJs

A lazy query source.

Implements

IQuerySource

Index

Constructors

constructor

new QuerySourceRdfJs(
    source: Source,
    dataFactory: ComunicaDataFactory,
    bindingsFactory: BindingsFactory,
): QuerySourceRdfJs
Parameters
- source: Source
- dataFactory: ComunicaDataFactory
- bindingsFactory: BindingsFactory
Returns QuerySourceRdfJs
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:26

Properties

referenceValue

referenceValue: string | Source<Quad>

The URL of RDF source of this source.

`Protected` `Readonly`selectorShape

selectorShape: FragmentSelectorShape

`Protected` `Readonly`source

source: IRdfJsSourceExtended

Methods

getSelectorShape

getSelectorShape(): Promise<FragmentSelectorShape>
Get the selector type that is supported by this source.

Returns Promise<FragmentSelectorShape>
Implementation of IQuerySource.getSelectorShape
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:62

queryBindings

queryBindings(operation: Operation, context: IActionContext): BindingsStream
Returns a (possibly lazy) stream that returns all bindings matching the operation.

Passed operations MUST conform to the query shape exposed by the selector type returned from getSelectorShape. The given operation represents a Linked Data Fragments selector.

The returned stream MUST expose the property 'metadata' of type MetadataBindings. The implementor is reponsible for handling cases where 'metadata' is being called without the stream being in flow-mode. This metadata object can become invalidated (see metadata.state), in which case the 'metadata' property must and will be updated.
Parameters
- operation: Operation
  The query operation to execute.
- context: IActionContext
  The query context.
Returns BindingsStream
The resulting bindings stream.

See
https://linkeddatafragments.org/specification/linked-data-fragments/#selectors
Implementation of IQuerySource.queryBindings
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:66

queryBoolean

queryBoolean(_operation: Ask, _context: IActionContext): Promise<boolean>
Returns a promise resolving to the ask response of the given operation.

This method should only be supported if the selector type returned from getSelectorShape supports ask queries.
Parameters
- _operation: Ask
- _context: IActionContext
Returns Promise<boolean>
The resulting ask reply.
Implementation of IQuerySource.queryBoolean
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:197

queryQuads

queryQuads(_operation: Operation, _context: IActionContext): AsyncIterator<Quad>
Returns a (possibly lazy) stream that returns all quads matching the operation.

This method should only be supported if the selector type returned from getSelectorShape supports construct queries.
Parameters
- _operation: Operation
- _context: IActionContext
Returns AsyncIterator<Quad>
The resulting quads stream.
Implementation of IQuerySource.queryQuads
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:190

queryVoid

queryVoid(_operation: Update, _context: IActionContext): Promise<void>
Returns a promise resolving when the given update operation succeeds.

This method should only be supported if the selector type returned from getSelectorShape supports update queries.
Parameters
- _operation: Update
- _context: IActionContext
Returns Promise<void>
The void response.
Implementation of IQuerySource.queryVoid
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:204

`Protected`setMetadata

setMetadata(
    it: AsyncIterator<any>,
    operation: Pattern,
    forceEstimateCardinality?: boolean,
    extraMetadata?: Record<string, any>,
): Promise<void>
Parameters
- it: AsyncIterator<any>
- operation: Pattern
- forceEstimateCardinality: boolean = false
- extraMetadata: Record<string, any> = {}
Returns Promise<void>
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:139

toString

toString(): string
Returns a string representation of this source.

Returns string
Implementation of IQuerySource.toString
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:211

`Static`hasDuplicateVariables

hasDuplicateVariables(pattern: BaseQuad): boolean
Parameters
- pattern: BaseQuad
Returns boolean
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:57

`Static`nullifyVariables

nullifyVariables(
term: undefined | Term,
quotedTripleFiltering: boolean,
): undefined | Term
Parameters
- term: undefined | Term
- quotedTripleFiltering: boolean
Returns undefined | Term
- Defined in packages/actor-query-source-identify-rdfjs/lib/QuerySourceRdfJs.ts:50

Class QuerySourceRdfJs

Implements

Index

Constructors

Properties

Methods

Constructors

constructor

Parameters

Returns QuerySourceRdfJs

Properties

referenceValue

Protected ReadonlyselectorShape

Protected Readonlysource

Methods

getSelectorShape

Returns Promise<FragmentSelectorShape>

queryBindings

Parameters

Returns BindingsStream

See

queryBoolean

Parameters

Returns Promise<boolean>

queryQuads

Parameters

Returns AsyncIterator<Quad>

queryVoid

Parameters

Returns Promise<void>

ProtectedsetMetadata

Parameters

Returns Promise<void>

toString

Returns string

StatichasDuplicateVariables

Parameters

Returns boolean

StaticnullifyVariables

Parameters

Returns undefined | Term

Settings

On This Page

`Protected` `Readonly`selectorShape

`Protected` `Readonly`source

`Protected`setMetadata

`Static`hasDuplicateVariables

`Static`nullifyVariables