[JXTA discuss]How to analyse the source code

first,thanks your answer,but i have a question now ,whether there are two level
architecture in devise myjxta?first,i explain my so-called two level
architecture,generally we develop a project ,we first get the low level
architecture--jxta platform,it provide some api interface to the upper level
application.while in the high level architecture,there is the myjxta
application,they use the lower level's api to use their service in order to
implement the project of myjxta.i want to know whether this free software myjxta
merge the two level architecture into one,not explicitly two level,because i do
not find the explicitly two level when i read the myjxta source code ,please tell
me .thanks.(is the free software myjxta's api  included in the jxta platform?
because i find a lot of lib in myjxta just the lib of jxta platform)
i want to do a two level architecture,in the low level we implement the api
fuction,in the high level we use application programe to use the api
interface.but
i do not where jxta platform's api are?
please give me some advice,thanks