On 23/04/14 13:20, Chriss Kalogeropoulos wrote:
Hello everyone,
a couple years ago i tried the same thing. The task was to implement a
JavaPOS driver handler from Delphi/FPC code.
The actual driver was implemented in C++ and it used a Java interface.
My code was the glue between the application (Delphi/FPC) and the
driver, it had to hook the events and call the appropriate methods for
printing etc (it was a POS printer driver).
I found that the only way to hook a native implemented listener to the
java class was either to write a small piece of code in java to do the
dispatching to my code OR use dynamic compilation to create the Java
byte code. Basically i had to write the java code inside my dll (in a
constact string) and pass this to the Java compiler to create the byte
code in memory.
This needed a lot of work and i dropped it since the actual java code
was less than 30 lines and it was very generic, so it was not worth
the effort.
Check this
http://www.javablogging.com/dynamic-in-memory-compilation/
This needs Java 6 (which was not an option in my case, i had to use
older versions). It might help you.
Also it needs to store the source files locally otherwise more dynamic
class generation will be needed.
The link above has the info you need.
If the java code is static, why would one need dynamic compilation?
Stephano
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