Due relies on bossac ,whats that ?

ok i get that ,atmel SAM BA or bossa ,but what programmer do you use in place of avrisp II?
surely atmel wouldnt issue a range of SAM 32 bit chips without creating a device for programming the SAM series of chips ? a jtag ice device or something else ??
i have a SAM4 evaluation kit but wondering how i program it .