/**
 * @private
 * @class DataFilter
 */
declare class DataFilter {
    /**
     * Reference to the instance of {ConditionCollection}.
     *
     * @type {ConditionCollection}
     */
    conditionCollection: {
        getFilteredColumns: () => unknown[];
        isMatch: (value: unknown, column: number) => boolean;
    };
    /**
     * Function which provide source data factory for specified column. The optional second
     * argument narrows the read to the given physical rows only.
     *
     * @type {Function}
     */
    columnDataFactory: (column: number, physicalRows?: number[]) => unknown[];
    /**
     * Initializes the data filter with a condition collection that provides filtering logic and a factory function that supplies column source data.
     */
    constructor(conditionCollection: {
        getFilteredColumns: () => unknown[];
        isMatch: (value: unknown, column: number) => boolean;
    }, columnDataFactory?: (column: number, physicalRows?: number[]) => unknown[]);
    /**
     * Filter data based on the conditions collection.
     *
     * @returns {Array}
     */
    filter(): unknown[];
    /**
     * Filter data based on specified physical column index.
     *
     * @param {number} column The physical column index.
     * @param {Array} [dataSource] Data source as array of objects with `value` and `meta` keys (e.g. `{value: 'foo', meta: {}}`).
     * @returns {Array} Returns filtered data.
     */
    filterByColumn(column: number, dataSource?: unknown[]): unknown[];
}
export default DataFilter;