run pig explain command over the entire script in java

[Petar Jovanovic]

Hi,
I am trying to find the way to run the explain command over the entire 
pig script in java. I was using PigServer but it offers only to do 
explain over the single query (alias) not the entire script. Is there a 
way to do something like:
$ pig -x local -e 'explain -script Temp1/TPC_test.pig -out explain-out9.txt'
but from my Java code?
Thanks.