Hello all can i compile java source from java code? the reason i asking is : i have some test files that representing classes and methods and i need to transform them into java code ( i know to do the lexing ) and then this code compile and store some how the class's in memory . can it be done in java 1.5 ? not 1.6 . thanks
Hello well this is cool way to comiple java , but i meant more like compiling the java source and manege all the classes/object created in memory and not like "real *.class" files. thanks
hi thanks for the replay , as i see it still reads class files that compiled in some form . i need to do every thing in memory . to transform file (idl ) to java source and compile it then store the classes in memory .
No, Javassist does not read existing class files. It can do that, but it's not necessary. I've used it to create classes in memory from scratch, with no reference to any existing class.
But now that you mention IDL files, it seems that you are actually trying to do something very different. In order for us to help you, we'd need to know more about what exactly that is.
It is possible to do this all in memory. Have a look at the API documentation of the package javax.tools in JDK 6; especially the interface JavaCompiler.
The compiler works with JavaFileObject objects. A JavaFileObject represents a Java source or class file. But it doesn't really need to be a file on disk; you can create your own subclass of JavaFileObject that keeps the source and compiled classes completely in memory, instead of writing them to disk.
The newest version of Glassfish (Sun's open source Java EE server) is doing something like this: from JSP's it generates source code for a servlet and compiles it, all in memory. Because it's done all in memory, it works very quickly.
Suns idlj compiler is written in Java, but its help seems to imply that it expects a file as input. But maybe you're using a different IDL-to-Java compiler?
Why does it all have to happen in memory in the first place?
hi thanks for the reply i need it in memory coz , this is a client application every time that the server stub changes i could give the client new idl . now it is abig pain to compile and manage 40 idls . for the client . Thanks
