import type { ValidationTriggerSelector } from './ValidationTriggerSelector';
import type { INotifyMapChanged } from '../../collections';
import { ValidationTrigger } from './ValidationTrigger';
/**
 * Represents the map item validation trigger configuration.
 * @template TKey The type of keys the map contains.
 * @template TItem The type of items the map contains.
 */
export interface IMapItemValidationTriggerConfig<TKey, TItem> {
    /**
     * Gets the map containing the items that may trigger validation.
     */
    readonly map: INotifyMapChanged<TKey, TItem> & Iterable<[TKey, TItem]>;
    /**
     * Gets the selector that provides the individual validation triggers for each item.
     */
    readonly validationTriggerSelector: ValidationTriggerSelector<TItem>;
    /**
     * Optional, a guard method which controls when a validation should be triggered.
     * @param item The item that changed which may trigger a validation.
     */
    shouldTriggerValidation?(item: TItem): boolean;
}
/**
 * Represents a map item validation trigger. Instead of triggering a validation only when the map changes,
 * a validation may be triggered by any of the contained items when they themselves change.
 *
 * This is useful when within the collection there is a field that needs to be unique,
 * such as a unique name for each item in the collection.
 *
 * @template TKey The type of keys the map contains.
 * @template TItem The type of items the map contains.
 */
export declare class MapItemValidationTrigger<TKey, TItem> extends ValidationTrigger<INotifyMapChanged<TKey, TItem> & Iterable<[TKey, TItem]>> {
    private readonly _validationTriggerSelector;
    private readonly _shouldTriggerValidation;
    private readonly _itemValidationTriggersByItem;
    private readonly _maChangedEventHandler;
    private static _defaultShouldTriggerValidation;
    /**
     * Initializes a new instance of the {@linkcode MapItemValidationTrigger} class.
     * @param config The validation trigger config.
     */
    constructor(config: IMapItemValidationTriggerConfig<TKey, TItem>);
    /**
     * Subscribes to map and item changes.
     */
    protected subscribeToTarget(): void;
    /**
     * Unsubscribes from map and item changes.
     */
    protected unsubscribeFromTarget(): void;
    private _ensureItemValidationTriggers;
}