import { ObjectWrapper } from '../sync/ObjectWrapper';
export declare type PrimaryKeyType = string | number;
export declare type SubSignature = number;
declare abstract class Cache<T> {
    protected primaryKeys: string[];
    protected capacity_: number;
    protected cacheNodeMap: Map<number, T>;
    constructor(primaryKeys: string[]);
    get capacity(): number;
    abstract cache(record: object, versionId?: number, reference?: SubSignature): T;
    abstract remove(versionId: number, reference: SubSignature): void;
    abstract get(versionId: number): T | undefined;
    protected hash(value: string | number): string;
    getRecordHash(record: unknown): string;
}
export declare class CacheNode<T> {
    readonly versionId: number;
    keys?: PrimaryKeyType[];
    record?: T;
    constructor(versionId: number);
}
export declare class SnapshotCache extends Cache<CacheNode<ObjectWrapper>> {
    constructor(primaryKeys: string[]);
    cache(record: ObjectWrapper, versionId: number): CacheNode<ObjectWrapper>;
    remove(versionId: number): void;
    get(versionId: number): CacheNode<ObjectWrapper> | undefined;
}
export {};