/**
 * Converts arbitrary values into longs using extended conversion rules:
 * - Strings are converted to floats, then to longs
 * - DateTime: total number of milliseconds since unix epoсh
 * - Boolean: 1 for true and 0 for false
 *
 * ### Example ###
 *
 *     let value1 = LongConverter.toNullableLong("ABC"); // Result: null
 *     let value2 = LongConverter.toNullableLong("123.456"); // Result: 123
 *     let value3 = LongConverter.toNullableLong(true); // Result: 1
 *     let value4 = LongConverter.toNullableLong(new Date()); // Result: current milliseconds
 */
export declare class LongConverter {
    /**
     * Converts value into long or returns null when conversion is not possible.
     *
     * @param value     the value to convert.
     * @returns         long value or null when conversion is not supported.
     */
    static toNullableLong(value: any): number;
    /**
     * Converts value into long or returns 0 when conversion is not possible.
     *
     * @param value     the value to convert.
     * @returns         long value or 0 when conversion is not supported.
     *
     * @see [[toLongWithDefault]]
     */
    static toLong(value: any): number;
    /**
     * Converts value into integer or returns default when conversion is not possible.
     *
     * @param value         the value to convert.
     * @param defaultValue  the default value.
     * @returns             long value or default when conversion is not supported
     *
     * @see [[toNullableLong]]
     */
    static toLongWithDefault(value: any, defaultValue: number): number;
}