Hi,
I'am wondering if it's possible to generate a Filter java class on the fly using javassist. The Filter class could have a method getResult() with a code block (=code condition which tests fields of a Foo instance) and returns the result of it as given below.
Other requirement is: the code condition is known at runtime after instanciation of Foo and can change in the time.
Public class Foo {
int _a ;
public Foo (int a){
_a=a;
}
}
public class Main {
public static void main(String[] args) {
// instanciate a new object
Foo f = new Foo(args[0]).intValue());
// generate a specific new class Filter on-the-fly,load, construct an instance knowing taking into account the code condition
byte[] bytes = createFilter();
Class clas = s_classLoader.load(cname, bytes);
IAccess filter = null;
f = (IAccess)clas.newInstance();
System.out.println(f.getResult())
}
}
Executing the Main, the expected result would be:
%java Main 10 "a>5"
true
%java Main 2 "a>5"
false
What could be the design of this class generated on-the-fly ? Is there alternatives or another design ?
Thanks in advance,
