import { DataGroup, AggregateColumn, AggregationColumnStore, GroupDescriptor } from './aggr_structures';
import { DataRow } from "./data_row";
/**
 * Represents AggregationSettings structure prepared for saving into a storage.
 */
export interface AggregationSettingsData {
    groups: Array<DataGroup>;
    ugt: boolean;
    urc: boolean;
    csg: boolean;
    aggregates: Array<AggregateColumn>;
}
/**
 * Defines aggregations settings for the current context.
 * Group, aggregate columns, grand totals, etc.
 */
export declare class AggregationSettings {
    private colStore;
    readonly COUNT_FIELD_NAME: string;
    private aggregates;
    groups: DataGroup[];
    private useGrandTotals;
    private useRecordCount;
    private _caseSensitiveGroups;
    compareValues: (value1: any, value2: any) => boolean;
    constructor(colStore: AggregationColumnStore);
    get caseSensitiveGroups(): boolean;
    set caseSensitiveGroups(value: boolean);
    private updateCompareProc;
    addGroup(settings: GroupDescriptor): this;
    addAggregateColumn(colIndexOrId: number | string, funcId: string): this;
    addGrandTotals(): this;
    addCounts(): this;
    getGroups(): {
        columns: any[];
        aggregates: AggregateColumn[];
        name?: string;
    }[];
    getInternalGroups(): DataGroup[];
    lastGroup(): {
        columns: any[];
        aggregates: AggregateColumn[];
        name?: string;
    };
    getAggregates(): Array<AggregateColumn>;
    hasAggregates(): boolean;
    hasGroups(): boolean;
    hasGrandTotals(): boolean;
    hasRecordCount(): boolean;
    isEmpty(): boolean;
    isValid(): boolean;
    drop(): void;
    clear(): this;
    /**
     * Checks if all columns from the list passed in the parameter are "unused".
     * Here "unused column" means a column that is included neither in any group nor in the aggregates list.
     * @param cols - the array of column IDs
     * @returns true if all columns in the list are not used anywhere, othervise - fals
     */
    private hasColumnsInUse;
    needAggrCalculation(): boolean;
    saveToData(): AggregationSettingsData;
    loadFromData(data: AggregationSettingsData): void;
    buildGroupKey(group: DataGroup, row: DataRow): any;
    private strictCompare;
    private caseInsensitiveCompare;
}