Class SceneLayerQueryProvider

A query provider for scene layers.

Hierarchy (view full)

QueryProviderBase
- SceneLayerQueryProvider

Index

Constructors

Methods

_count _query _queryMany count isSupported query

Constructors

constructor

new SceneLayerQueryProvider(): SceneLayerQueryProvider
Returns SceneLayerQueryProvider
Inherited from QueryProviderBase.constructor

Methods

`Protected`_count

_count(source, where, options): Promise<CountResult>
Invoked to perform the actual work for count. Derived classes should override this method rather than count().
Parameters
- source: FeatureSource
  The source to query.
- where: string
  An SQL expression to match against, e.g. "lastName='Smith'".
- options: QueryOptions
  Additional options that affect the query.
Returns Promise<CountResult>
Overrides QueryProviderBase._count

`Protected`_query

_query(source, where, options): AsyncIterable<Feature, any, any>
Invoked to perform the actual work for query. Derived classes should override this method rather than query().
Parameters
- source: FeatureSource
  The source to query.
- where: string
  An SQL expression to match against, e.g. "lastName='Smith'".
- options: QueryOptions
  Additional options that affect the query.
Returns AsyncIterable<Feature, any, any>
Overrides QueryProviderBase._query

`Protected`_queryMany

_queryMany(sources, where, options?): AsyncIterable<Feature, any, any>
Invoked to perform the work for query. Default implementation calls _query for each source. Derived classes can override this method to implement special handling for multiple sources.
Parameters
- sources: FeatureSource[]
  The sources to identify.
- where: string
  An SQL expression to match against, e.g. "lastName='Smith'".
- Optionaloptions: QueryOptions
  Additional options that affect the query.
Returns AsyncIterable<Feature, any, any>
Inherited from QueryProviderBase._queryMany

count

count(source, where, options?): Promise<CountResult>
Queries a given feature source for a count of features that match the query criteria.
Parameters
- source: FeatureSource
  The source to query.
- where: string
  An SQL expression to match against, e.g. "lastName='Smith'".
- Optionaloptions: QueryOptions
  Additional options that affect the query.
Returns Promise<CountResult>
Inherited from QueryProviderBase.count

isSupported

isSupported(source): boolean
Determines whether this provider can handle queries for the given feature source.
Parameters
- source: FeatureSource
  The feature source.
Returns boolean
Overrides QueryProviderBase.isSupported

query

query(source, where, options?): AsyncIterable<Feature, any, any>
Queries a given feature source for features that match the query criteria.
Parameters
- source: FeatureSource | FeatureSource[]
  The source to query.
- where: string
  An SQL expression to match against, e.g. "lastName='Smith'".
- Optionaloptions: QueryOptions
  Additional options that affect the query.
Returns AsyncIterable<Feature, any, any>
Inherited from QueryProviderBase.query