import type { ValidatorComponent, UnsignedNumberValidator } from "../internal/internal.mjs";
/**
 * Validates the state of a `string`.
 */
interface StringValidator<T extends string | undefined | null> extends ValidatorComponent<T> {
    /**
     * Ensures that the value starts with some prefix.
     *
     * @param prefix - the value that the string must start with
     * @returns this
     * @throws TypeError     if the value or `prefix` are `undefined` or `null`
     * @throws RangeError if the value does not start with `prefix`
     */
    startsWith(prefix: string): this;
    /**
     * Ensures that the value does not start with some prefix.
     *
     * @param prefix - the value that the string may not start with
     * @returns this
     * @throws TypeError     if the value or `prefix` are `undefined` or `null`
     * @throws RangeError if the value starts with `prefix`
     */
    doesNotStartWith(prefix: string): this;
    /**
     * Ensures that the value ends with some suffix.
     *
     * @param suffix - the value that the string must end with
     * @returns this
     * @throws TypeError     if the value or `suffix` are `undefined` or `null`
     * @throws RangeError if the value does not end with `suffix`
     */
    endsWith(suffix: string): this;
    /**
     * Ensures that the value does not end with some suffix.
     *
     * @param suffix - the value that the string may not end with
     * @returns this
     * @throws TypeError     if the value or `suffix` are `undefined` or `null`
     * @throws RangeError if the value ends with `suffix`
     */
    doesNotEndWith(suffix: string): this;
    /**
     * Ensures that the value contains some substring.
     *
     * @param expected - the string that the value must contain
     * @returns this
     * @throws TypeError     if the value or `expected` are `undefined` or `null`
     * @throws RangeError if the value does not contain `expected`
     */
    contains(expected: string): this;
    /**
     * Ensures that the value does not contain some substring.
     *
     * @param unwanted - the string that the value may not contain
     * @returns this
     * @throws TypeError     if the value or `unwanted` are `undefined` or `null`
     * @throws RangeError if the value contains `unwanted`
     */
    doesNotContain(unwanted: string): this;
    /**
     * Ensures that the value does not contain whitespace characters.
     *
     * @returns this
     * @throws NullPointerException     if the value is `undefined` or `null`
     * @throws IllegalArgumentException if the value contains whitespace characters
     */
    doesNotContainWhitespace(): this;
    /**
     * Ensures that the value matches a regular expression.
     *
     * @param regex - the regular expression
     * @returns this
     * @throws TypeError     if the value is `undefined` or `null`
     * @throws RangeError if the value does not match `regex`
     */
    matches(regex: RegExp): this;
    /**
     * Ensures that the value is empty.
     *
     * @returns this
     * @throws TypeError     if the value is `undefined` or `null`
     * @throws RangeError if the value is not empty
     */
    isEmpty(): this;
    /**
     * Ensures that the value is not empty.
     *
     * @returns this
     * @throws TypeError     if the value is `undefined` or `null`
     * @throws RangeError if the value is empty
     */
    isNotEmpty(): this;
    /**
     * Ensures that the value does not contain leading or trailing whitespace.
     *
     * @returns this
     * @throws TypeError     if the value is `undefined` or `null`
     * @throws RangeError if the value contains leading or trailing whitespace
     * @see isEmpty
     */
    isTrimmed(): this;
    /**
     * Returns a validator for the length of the string.
     *
     * @returns a validator for the length of the string
     * @throws TypeError if the value is `undefined` or `null`
     */
    length(): UnsignedNumberValidator;
}
export type { StringValidator };