struct.ts

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//
//   http://www.apache.org/licenses/LICENSE-2.0
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import { StructRow } from './row';
import { BaseVector } from './base';
import { DataType, Struct } from '../type';

/** @ignore */ const kRowIndex = Symbol.for('rowIndex');
/** @ignore */
export class StructVector<T extends { [key: string]: DataType } = any> extends BaseVector<Struct<T>> {
    private _row!: StructRow<T>;
    public bind(index: number): Struct<T>['TValue'] {
        const proto = this._row || (this._row = new StructRow<T>(this));
        const bound = Object.create(proto);
        bound[kRowIndex] = index;
        return bound;
    }
}