The interface between tcl and java treats everything like null-terminated strings, so this wouldn't currently work in nsjava/freechart. But that's a good point. I'll add it to my todo list to support passing binary data to/from tcl.
One other thing to note, nsjava does not support servlets. Instead it is a tcl extension module that allows the scripting of java components from tcl. Currently it provides a tcl api to perform the following functions in tcl:
- Create instances of Java Objects from Tcl
- Invoke instance methods on a java object from Tcl
- Invoke methods on java array objects from Tcl
- Invoke java static methods from Tcl
- Get and Set Java Field values from Tcl
- Determine if an Tcl Object is an instance of a Java Class
- Introspect java objects from Tcl
- Throw and Catch Java exceptions from Tcl
- Lock and Unlock Java objects so that they aren't garbage collected
- Import and un-import java classes to/from Tcl
- Full access to aolserver database api from within user-defined java classes
