Method initData

src/data/DataStore.ts:192–234

* Initialize from data

(
        provider: DataProvider,
        inputDimensions: DataStoreDimensionDefine[],
        dimValueGetter?: DimValueGetter
    )

     * Initialize from data
     */
    initData(
        provider: DataProvider,
        inputDimensions: DataStoreDimensionDefine[],
        dimValueGetter?: DimValueGetter
    ): void {
        if (__DEV__) {
            assert(
                isFunction(provider.getItem) && isFunction(provider.count),
                'Invalid data provider.'
            );
        }

        this._provider = provider;

        // Clear
        this._chunks = [];
        this._indices = null;
        this.getRawIndex = this._getRawIdxIdentity;

        const source = provider.getSource();
        const defaultGetter = this.defaultDimValueGetter =
             defaultDimValueGetters[source.sourceFormat];
        // Default dim value getter
        this._dimValueGetter = dimValueGetter || defaultGetter;

        // Reset raw extent.
        this._rawExtent = [];
        const willRetrieveDataByName = shouldRetrieveDataByName(source);
        this._dimensions = map(inputDimensions, dim => {
            if (__DEV__) {
                if (willRetrieveDataByName) {
                    assert(dim.property != null);
                }
            }
            return {
                // Only pick these two props. Not leak other properties like orderMeta.
                type: dim.type,
                property: dim.property
            };
        });

        this._initDataFromProvider(0, provider.count());
    }

    getProvider(): DataProvider {
        return this._provider;