Generating Java source code and jumps
<p>I am generating Java code on the fly which will then be compiled and loaded back in. My issues is that I essentially need jumps because when I return from the function I wish to continue execution from the point in the loop from where I have exited. Hopefully, the code here illustrates my desire. Although the actual code will have some ifs as well and be much deeper.</p>

<pre><code>MyIter a,b,c;

boolean func() {
 jump to correct state here

 state0:

 a = ...;
 while (a.next()) {
   state1: while (b.next()) {
     return true; // start again at state1
   }
   b = ...;
 }

 c = ...;
 state2:
 while (c.next()) {
   return true; // start again at state2
 }
 return false;
}
</code></pre>

<p>In C I would probably use a jump table and state variable. Performance is the key here and the code interacts with the Java application. </p>

<p>My best guesses so far have been:</p>

<ul>
<li>Flipping the nesting of loops and the logic. That became too cumbersome and problematic.</li>
<li>Adding logic to allow the flow to get back to where it was but this may be messy.</li>
<li>I assume the bytecode can jump so I could generate the bytecode myself but that doesn't seem ideal (is there any good libraries for this?)</li>
<li>Continuation passing style to avoid returning but that would involve major restructuring, although currently the likely way to go.</li>
</ul>

<p>I was wondering if anyone had any thoughts?</p>
