export interface HttpParameterCodec {
    encodeKey(key: string): string;
    encodeValue(value: string): string;
    decodeKey(key: string): string;
    decodeValue(value: string): string;
}
/**
 * Provides encoding and decoding of URL parameter and query-string values.
 *
 * Serializes and parses URL parameter keys and values to encode and decode them.
 * If you pass URL query parameters without encoding,
 * the query parameters can be misinterpreted at the receiving end.
 */
export declare class HttpUrlEncodingCodec implements HttpParameterCodec {
    /**
     * Encodes a key name for a URL parameter or query-string.
     * @param key The key name.
     * @returns The encoded key name.
     */
    encodeKey(key: string): string;
    /**
     * Encodes the value of a URL parameter or query-string.
     * @param value The value.
     * @returns The encoded value.
     */
    encodeValue(value: string): string;
    /**
     * Decodes an encoded URL parameter or query-string key.
     * @param key The encoded key name.
     * @returns The decoded key name.
     */
    decodeKey(key: string): string;
    /**
     * Decodes an encoded URL parameter or query-string value.
     * @param value The encoded value.
     * @returns The decoded value.
     */
    decodeValue(value: string): string;
}
export declare class HttpParams {
    private map;
    private encoder;
    constructor(source?: string | {
        [param: string]: string | number | boolean | ReadonlyArray<string | number | boolean>;
    } | null, options?: {
        encoder?: HttpParameterCodec;
    });
    has(param: string): boolean;
    get(param: string): string | null;
    getAll(param: string): string[] | null;
    keys(): string[];
    append(param: string, value: string | number | boolean): HttpParams;
    appendAll(params: {
        [param: string]: string | number | boolean | ReadonlyArray<string | number | boolean>;
    }): HttpParams;
    set(param: string, value: string | number | boolean | ReadonlyArray<string | number | boolean>): HttpParams;
    delete(param: string, value?: string | number | boolean): HttpParams;
    toString(): string;
    private clone;
}