import { FocusMonitor } from '@angular/cdk/a11y';
import { ChangeDetectorRef, ElementRef, EventEmitter } from '@angular/core';
import { ControlValueAccessor, NgControl } from '@angular/forms';
import { RdsNullParameter, RdsNullParameterOption } from '../core/models/filter/null-filter.model';
export declare class RdsNullFilterComponent implements ControlValueAccessor {
    _control: NgControl;
    private _changeDetectorRef;
    private _focusMonitor;
    /** Whether the control is disabled, default to false */
    get disabled(): any;
    set disabled(value: any);
    private _disabled;
    /** Whether the control is required, defaults to false */
    required: boolean;
    /** Label for mat-select, defaults to null */
    selectLabel: string | null;
    /** The selected null parameter and value for this control, defaults to null/unselected */
    set value(value: RdsNullParameter | null);
    get value(): RdsNullParameter | null;
    private _value;
    /** Changed value of the form control */
    readonly selectionChange: EventEmitter<"NOT_APPLIED" | "!=NULL" | "=NULL">;
    _options: Array<RdsNullParameterOption>;
    _onTouched: () => any;
    private _controlValueAccessorChangeFn;
    constructor(_control: NgControl, elementRef: ElementRef<HTMLElement>, _changeDetectorRef: ChangeDetectorRef, _focusMonitor: FocusMonitor);
    registerOnChange(fn: any): void;
    registerOnTouched(fn: any): void;
    setDisabledState(isDisabled: boolean): void;
    writeValue(obj: any): void;
    _emitChangeEvent(newValue: RdsNullParameter | null): void;
}