import { RequestParameter } from '../transport/types.js';
/**
 * Serializer for HTTP cookies.
 * Converts cookie parameters into a cookie object for requests.
 */
export declare class CookieSerializer {
    /**
     * Serializes cookie parameters into a cookie object.
     * @param cookieParams - Map of cookie names to their parameter values
     * @returns A record of cookie names to serialized values, or undefined if no cookies
     */
    serialize(cookieParams: Map<string, RequestParameter> | undefined): Record<string, string> | undefined;
    /**
     * Serializes a single cookie value based on its type.
     * @param param - The cookie parameter to serialize
     * @returns The serialized cookie value string
     */
    private serializeCookieValue;
    /**
     * Serializes a primitive cookie value.
     * @param value - The primitive value to serialize
     * @returns The string representation of the value
     */
    private serializePrimitive;
    /**
     * Serializes an array cookie value.
     * @param value - The array to serialize
     * @param param - The cookie parameter configuration
     * @returns The serialized array string
     */
    private serializeArray;
    /**
     * Serializes an object cookie value as JSON.
     * @param obj - The object to serialize
     * @param param - The cookie parameter configuration
     * @returns The JSON string representation of the object
     */
    private serializeObject;
    /**
     * Type guard to check if a value is a non-null object.
     * @param value - The value to check
     * @returns True if the value is an object and not null
     */
    private isNonNullObject;
}
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