import { ToStringable } from "../util";
/**
 * An Identity points to a specific set of entities.
 */
export declare type Identity = All | ByIds | ByIndexes;
/**
 * All the types of identities.
 */
export declare type Identities = Identity["type"];
/**
 * Common code of identities.
 */
export declare abstract class IdentityBase {
    abstract type: any;
    /**
     * How likely it is to reduce another identity (lower is better).
     */
    abstract priority: any;
    /**
     * Reduce another identity, trying to make its resulting set smaller.
     */
    abstract reduce(other: Identity): Identity;
    protected _toString: string;
    constructor(toString?: string);
    /**
     * If this identity points to a bigger or equal set of entities.
     */
    isSupersetOf(other: Identity): boolean;
    /**
     * If this identity points to a lesser or equal set of entities.
     */
    isSubsetOf(other: Identity): boolean;
    /**
     * If this identity points to the same set of entities.
     */
    equals(other: Identity): boolean;
    toString(): string;
}
/**
 * Points to all entities.
 */
export declare class All extends IdentityBase {
    readonly type: "all";
    /** @inheritdoc */
    readonly priority: number;
    constructor();
    /** @inheritdoc */
    reduce(other: Identity): Identity | null;
}
/**
 * Points a set of entities specified by their primary keys.
 */
export declare class ByIds extends IdentityBase {
    readonly type: "ids";
    /** @inheritdoc */
    readonly priority: number;
    readonly ids: ReadonlyArray<ToStringable>;
    constructor(ids: ArrayLike<ToStringable>);
    /** @inheritdoc */
    reduce(other: Identity): Identity | null;
}
/**
 * Points to a set of entities specified by the values of indexed properties.
 */
export declare class ByIndexes extends IdentityBase {
    readonly type: "indexes";
    /** @inheritdoc */
    readonly priority: number;
    /**
     * Specific values indexed properties of entities must have.
     */
    readonly criteria: Readonly<ByIndexes.Criteria>;
    constructor(criteria: ByIndexes.Criteria);
    /** @inheritdoc */
    reduce(other: Identity): Identity | null;
}
export declare module ByIndexes {
    /**
     * Specific values indexed properties of entities must have.
     */
    type Criteria = {
        [key: string]: ToStringable;
    };
}