/**
 * Interface EnigmaComponent unifies rotors, patchboard and reflector
 * of an enigma.
 */
interface EnigmaComponent {

    /**
     * Applies the substitution chiffre of this enigma component in the current
     * state to symbol.
     *
     * @param symbol The symbol to encode with the substitution chiffre of this
     *               enigma component in its current state.
     * @return The symbol which is the encoded symbol of the parameter symbol.
     */
    int encode(int symbol);

    /**
     * Applies the inverse substitution chiffre of this enigma component in the
     * current state to letter.
     *
     * @param symbol The symbol to decode with the (inverse) substitution
     *               chiffre of this enigma component in its current state.
     * @return The symbol which is the decoded symbol of the parameter symbol.
     */
    int decode(int symbol);

    /**
     * In case this component can do ticks, this component performs its next
     * tick. In case this triggers ticks of subsequent components, their ticks
     * are also triggered.
     */
    void tick();
}