import { Observable } from 'rxjs';
import { ReactiveIDBObjectStore } from './reactive-idb-object-store';
export declare class ReactiveIDBIndex<T = unknown> {
    private readonly index;
    readonly objectStore: ReactiveIDBObjectStore<T>;
    get keyPath(): string | string[];
    get multiEntry(): boolean;
    /**
     * Returns the name of the index.
     */
    get name(): string;
    /**
     *
     */
    get unique(): boolean;
    /**
     *
     * @param index
     * @param objectStore The ReactiveIDBObjectStore this index belongs to.
     */
    constructor(index: IDBIndex, objectStore: ReactiveIDBObjectStore<T>);
    /**
     * Retrieves the number of records matching the given key or key range in query.
     *
     * If successful, request's result will be the count.
     */
    count$(key?: IDBValidKey | IDBKeyRange): Observable<number>;
    /**
     * Retrieves the value of the first record matching the given key or key range in query.
     *
     * If successful, request's result will be the value, or undefined if there was no matching record.
     */
    get$(key: IDBValidKey | IDBKeyRange): Observable<T | undefined>;
    /**
     * Retrieves the values of the records matching the given key or key range in query (up to count if given).
     *
     * If successful, request's result will be an Array of the values.
     */
    getAll$(query?: IDBValidKey | IDBKeyRange | null, count?: number): Observable<T[]>;
    /**
     * Retrieves the keys of records matching the given key or key range in query (up to count if given).
     *
     * If successful, request's result will be an Array of the keys.
     */
    getAllKeys$(query?: IDBValidKey | IDBKeyRange | null, count?: number): Observable<IDBValidKey[]>;
    /**
     * Retrieves the key of the first record matching the given key or key range in query.
     *
     * If successful, request's result will be the key, or undefined if there was no matching record.
     */
    getKey$(key: IDBValidKey | IDBKeyRange): Observable<IDBValidKey | undefined>;
    /**
     * Opens a cursor over the records matching query, ordered by direction. If query is null, all records in index are matched.
     *
     * If successful, request's result will be an IDBCursorWithValue, or null if there were no matching records.
     */
    openCursor$(query?: IDBValidKey | IDBKeyRange | null, direction?: IDBCursorDirection): Observable<IDBCursorWithValue | null>;
    /**
     * Opens a cursor with key only flag set over the records matching query, ordered by direction. If query is null, all records in index are matched.
     *
     * If successful, request's result will be an IDBCursor, or null if there were no matching records.
     */
    openKeyCursor$(query?: IDBValidKey | IDBKeyRange | null, direction?: IDBCursorDirection): Observable<IDBCursor | null>;
}