import BTree from 'sorted-btree';
import { DbQuery } from './types';
export interface IxSetIndexDefinition<TEntity> {
    fields: (keyof TEntity)[];
}
declare const ID: unique symbol;
type IndexKey<TEntity> = TEntity & {
    [ID]: any;
};
export interface IxSetIndex<TEntity> extends IxSetIndexDefinition<TEntity> {
    tree: BTree<IndexKey<TEntity>, void>;
    compare: (a: IndexKey<TEntity>, b: IndexKey<TEntity>) => number;
}
export declare class IxSet<TEntity, TId> {
    private getId;
    empty: BTree<TId, TEntity>;
    /** Primary key - a b-tree with entity ID as a key, and entity itself as a value */
    pk: BTree<TId, TEntity>;
    indexes: IxSetIndex<TEntity>[];
    constructor(getId: (e: Partial<TEntity>) => TId, indexesDefinition: IxSetIndexDefinition<TEntity>[]);
    clone(): IxSet<TEntity, TId>;
    byId(id: TId): TEntity;
    with(items: Partial<TEntity>[]): IxSet<TEntity, TId>;
    query(query: DbQuery<TEntity>): TEntity[];
    queryOne(query: DbQuery<TEntity>): TEntity;
}
export {};
//# sourceMappingURL=IxSet.d.ts.map