geoview-core
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    Class GeoJSON

    Class used to add GeoJSON layer to the map

    GeoJSON

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    geoviewLayerId geoviewLayerName hitTolerance layerLoadError listOfLayerEntryConfig metadataAccessPath olRootLayer? serverDateFragmentsOrder? DEFAULT_HIT_TOLERANCE DEFAULT_WAIT_PERIOD_METADATA_WARNING DEFAULT_WAIT_SLOW_FETCH_WARNING

    Methods

    addLayerLoadError aggregateLayerLoadErrors allLayerStatusAreGreaterThanOrEqualTo createGeoViewLayers createGVLayer createLayerGroup createVectorSource emitLayerEntryRegisterInit emitMessage fetchServiceMetadata getAllLayerEntryConfigs getClassName getGeoviewLayerId getLayerEntryNameOrGeoviewLayerName getMetadata hasLayerLoadedErrors initGeoViewLayerEntries offLayerConfigCreated offLayerEntryProcessed offLayerEntryRegisterInit offLayerGroupCreated offLayerGVCreated offLayerMessage onCreateGVLayer onCreateVectorSource onFetchServiceMetadata onInitLayerEntries onLayerConfigCreated onLayerEntryProcessed onLayerEntryRegisterInit onLayerGroupCreated onLayerGVCreated onLayerMessage onProcessLayerMetadata onProcessOneLayerEntry onValidateLayerEntryConfig onValidateListOfLayerEntryConfig throwAggregatedLayerLoadErrors validateLayerEntryConfig validateListOfLayerEntryConfig createGeoviewLayerConfig fetchMetadata initGeoviewLayerConfig processGeoviewLayerConfig

    Constructors

    Properties

    geoviewLayerId: string

    The unique identifier for the GeoView layer. The value of this attribute is extracted from the mapLayerConfig parameter. If its value is undefined, a unique value is generated.

    geoviewLayerName: string

    The GeoView layer name. The value of this attribute is extracted from the mapLayerConfig parameter. If its value is undefined, a default value is generated.

    hitTolerance: number = AbstractGeoViewLayer.DEFAULT_HIT_TOLERANCE

    The default hit tolerance

    layerLoadError: Error[] = []

    List of errors for the layers that did not load.

    listOfLayerEntryConfig: TypeLayerEntryConfig[] = []

    An array of layer settings. In the schema, this attribute is optional. However, we define it as mandatory and if the configuration does not provide a value, we use an empty array instead of an undefined attribute.

    metadataAccessPath: string

    The GeoView layer metadataAccessPath. The name attribute is optional

    olRootLayer?: BaseLayer

    The OpenLayer root layer representing this GeoView Layer.

    serverDateFragmentsOrder?: TypeDateFragments

    Date format object used to translate server to ISO format and ISO to server format

    DEFAULT_HIT_TOLERANCE: number = 4

    The default hit tolerance the query should be using

    DEFAULT_WAIT_PERIOD_METADATA_WARNING: number = ...

    The default waiting time before showing a warning about the metadata taking a long time to get processed

    DEFAULT_WAIT_SLOW_FETCH_WARNING: number = ...

    The maximum delay to wait before we warn about the features fetch taking a long time

    Methods

    • This method is used to create the layers specified in the listOfLayerEntryConfig attribute inherited from its parent. Normally, it is the second method called in the life cycle of a GeoView layer, the first one being the constructor. Its code is the same for all child classes. It must first validate that the olLayers attribute is null indicating that the method has never been called before for this layer. If this is not the case, an error message must be sent. Then, it calls the abstract method getAdditionalServiceDefinition. For example, when the child is a WFS service, this method executes the GetCapabilities request and saves the result in the metadata attribute of the class. It also process the layer's metadata for each layer in the listOfLayerEntryConfig tree in order to define the missing pieces of the layer's configuration. Layer's configuration can come from the configuration of the GeoView layer or from the information saved by the method #processListOfLayerMetadata, priority being given to the first of the two. When the GeoView layer does not have a service definition, the getAdditionalServiceDefinition method does nothing.

      Finally, the processListOfLayerEntryConfig is called to instantiate each layer identified by the listOfLayerEntryConfig attribute. This method will also register the layers to all layer sets that offer this possibility. For example, if a layer is queryable, it will subscribe to the details-panel and every time the user clicks on the map, the panel will ask the layer to return the descriptive information of all the features in a tolerance radius. This information will be used to populate the details-panel.

      Parameters

      • OptionalabortSignal: AbortSignal

        Abort signal to handle cancelling of fetch.

      Returns Promise<ConfigBaseClass[]>

      A promise of the config base classes created.

    • Protected

      Emits a layer-specific message event with localization support

      Parameters

      • messageKey: string

        The key used to lookup the localized message OR message

      • messageParams: string[] | undefined = []

        Array of parameters to be interpolated into the localized message

      • messageType: SnackbarType = ...

        The message type

      • Optionalnotification: boolean = false

        Whether to show this as a notification. Defaults to false

      Returns void

      this.emitMessage(
        'layers.fetchProgress',
        ['50', '100'],
        messageType: 'error',
        true
      );

      LayerMessageEvent

    • Overrides the creation of the source configuration for the vector layer.

      Parameters

      • layerConfig: VectorLayerEntryConfig

        The layer entry configuration.

      • sourceOptions: Options<Feature<Geometry>>

        The source options.

      • readOptions: ReadOptions

        The read options.

      Returns VectorSource<Feature<Geometry>>

      The source configuration that will be used to create the vector layer.

    • Overrides the way the metadata is fetched. Resolves with the Json object or undefined when no metadata is to be expected for a particular layer type.

      Type Parameters

      • T = TypeMetadataGeoJSON | undefined

      Parameters

      • OptionalabortSignal: AbortSignal

        Abort signal to handle cancelling of fetch.

      Returns Promise<T>

      A promise with the metadata or undefined when no metadata for the particular layer type.

      Error thrown when the metadata fetch fails or contains an error.

    • Creates a configuration object for a GeoJson Feature layer. This function constructs a TypeGeoJSONLayerConfig object that describes an GeoJson Feature layer and its associated entry configurations based on the provided parameters.

      Parameters

      • geoviewLayerId: string

        A unique identifier for the GeoView layer.

      • geoviewLayerName: string

        The display name of the GeoView layer.

      • metadataAccessPath: string

        The URL or path to access metadata or feature data.

      • isTimeAware: boolean

        Indicates whether the layer supports time-based filtering.

      • layerEntries: TypeLayerEntryShell[]

        An array of layer entries objects to be included in the configuration.

      Returns TypeGeoJSONLayerConfig

      The constructed configuration object for the GeoJson Feature layer.

    • Fetches the metadata for a typical GeoJson class.

      Parameters

      • url: string

        The url to query the metadata from.

      • OptionalabortSignal: AbortSignal

        Abort signal to handle cancelling of fetch.

      Returns Promise<TypeMetadataGeoJSON>

      Error thrown when the request exceeds the timeout duration.

      Error thrown when the request was aborted by the caller's signal.

      Error thrown when the response is not OK (non-2xx).

      Error thrown when the JSON response is empty.

    • Initializes a GeoView layer configuration for a GeoJson layer. This method creates a basic TypeGeoviewLayerConfig using the provided ID, name, and metadata access path URL. It then initializes the layer entries by calling initGeoViewLayerEntries, which may involve fetching metadata or sublayer info.

      Parameters

      • geoviewLayerId: string

        A unique identifier for the layer.

      • geoviewLayerName: string

        The display name of the layer.

      • metadataAccessPath: string

        The full service URL to the layer endpoint.

      Returns Promise<TypeGeoviewLayerConfig>

      A promise that resolves to an initialized GeoView layer configuration with layer entries.

    • Processes a GeoJSON GeoviewLayerConfig and returns a promise that resolves to an array of ConfigBaseClass layer entry configurations.

      This method:

      1. Creates a Geoview layer configuration using the provided parameters.
      2. Instantiates a layer with that configuration.
      3. Processes the layer configuration and returns the result.

      Parameters

      • geoviewLayerId: string

        The unique identifier for the GeoView layer.

      • geoviewLayerName: string

        The display name for the GeoView layer.

      • url: string

        The URL of the service endpoint.

      • layerIds: string[]

        An array of layer IDs to include in the configuration.

      • isTimeAware: boolean

        Indicates if the layer is time aware.

      Returns Promise<ConfigBaseClass[]>

      A promise that resolves to an array of layer configurations.

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    addLayerLoadErroraggregateLayerLoadErrorsallLayerStatusAreGreaterThanOrEqualTocreateGeoViewLayerscreateGVLayercreateLayerGroupcreateVectorSourceemitLayerEntryRegisterInitemitMessagefetchServiceMetadatagetAllLayerEntryConfigsgetClassNamegetGeoviewLayerIdgetLayerEntryNameOrGeoviewLayerNamegetMetadatahasLayerLoadedErrorsinitGeoViewLayerEntriesoffLayerConfigCreatedoffLayerEntryProcessedoffLayerEntryRegisterInitoffLayerGroupCreatedoffLayerGVCreatedoffLayerMessageonCreateGVLayeronCreateVectorSourceonFetchServiceMetadataonInitLayerEntriesonLayerConfigCreatedonLayerEntryProcessedonLayerEntryRegisterInitonLayerGroupCreatedonLayerGVCreatedonLayerMessageonProcessLayerMetadataonProcessOneLayerEntryonValidateLayerEntryConfigonValidateListOfLayerEntryConfigthrowAggregatedLayerLoadErrorsvalidateLayerEntryConfigvalidateListOfLayerEntryConfigcreateGeoviewLayerConfigfetchMetadatainitGeoviewLayerConfigprocessGeoviewLayerConfig