import type OlFeature from 'ol/Feature.js';
/**
 * Represents a grid data organized by unique ids.
 */
export type GridDataById = Record<string, GridData>;
/**
 * Represents the data structure for a grid, based on multiple features
 * for a same ID (and with a same structure, geom type and properties).
 *  - Columns are every (not ol) features properties name;
 *  - Data are every (not ol) features properties values;
 *  - Features are every Ol features (backref);
 *  - notOlProperties are every property but without ol specific one.
 */
export interface GridData {
    columns: string[];
    data: unknown[][];
    features: OlFeature[];
    notOlProperties: Record<string, unknown>[];
}
/**
 * Options for converting feature data to grid data.
 */
export interface FeatureToGridDataOptions {
    /** Determines whether to keep the geometry property as a property value. */
    keepGeomProperty?: boolean;
    /** Determines whether to keep (always) empty columns or not in columns and data. */
    removeEmptyColumns?: boolean;
}
/**
 * A feature-to-grid data converter, to show feature's properties in grid-like system.
 */
export default class FeatureToGridDataById {
    options: FeatureToGridDataOptions;
    constructor(options: FeatureToGridDataOptions);
    /**
     * Takes an array of OpenLayers features and converts them into a grid data object, where each feature
     * is mapped by its ID as the key.
     * @returns The grid data objects, by id.
     */
    toGridDataById(features: OlFeature[]): GridDataById;
    /**
     * @returns a gridDataByID for a single converted OL feature.
     * @private
     */
    private addFeatureToGridDataById;
    /**
     * @returns {GridData} A new empty grid data object with columns from given properties.
     * @static
     */
    private static createGridDataWithColumns;
    /**
     * Removes empty columns (columns and data) from a given gridData object.
     * It's expected that all features in the gridData have the same properties.
     * @static
     */
    private static removeEmptyColumns;
    /**
     * This method finds the indexes of empty columns in a given 2D array.
     * @param data - The 2D array to search for empty columns.
     * @returns An array of indexes representing the empty columns.
     * @static
     */
    private static findEmptyColumnIndexOf;
    static getUserFeatureType(feature: OlFeature): string;
}