Using my own policy implementation along side default

Is it possible to use my own Policy implementation along side the default one? For an application I have permissions that have more properties then the "name" and "actions". But for the other permissions, I would like to use the default policy file implementation. Is there a way to do
[298 byte] By [JNooreza] at [2007-11-27 4:56:15]
# 1
You don't need to make your own Policy implementation just because you want to use your own Permission classes.
ejpa at 2007-7-12 10:11:23 > top of Java-index,Security,Other Security APIs, Tools, and Issues...
# 2
My Policy implementation will also prevent people from editing the .policy file on the disk. The default one is in plain text so its easy for users to grant permissions to code that should have those permissions.
JNooreza at 2007-7-12 10:11:23 > top of Java-index,Security,Other Security APIs, Tools, and Issues...