import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare class AggregationFunctionService {
    private aggregateFieldsMap;
    private numberFieldsMap;
    private aggregateFieldResultsSubject;
    aggregateFieldResults$: Observable<{
        id: string;
        result: number;
        evaluated: boolean;
    } | null>;
    constructor();
    /**
     * Store or update an aggregate field in the map
     */
    setAggregateField(rowId: string, fieldId: string, operation: string, formula: string): void;
    /**
     * Store or update a number field in the map
     */
    setNumberField(rowId: string, fieldId: string, answer: number): void;
    private emitAggregateResult;
    evaluateCustomFormula(rowId: string, formula: string): number | null;
    evaluatePredefinedOperation(rowId: string, operation: string, formula: string): number | null;
    checkAndEvaluateFormulas(rowId: string): void;
    clearAll(): void;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<AggregationFunctionService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<AggregationFunctionService>;
}