private static byte[] loadClassFile(File classFile) {
try {
DataInputStream in = new DataInputStream(new FileInputStream(classFile));
byte[] ret = new byte[(int) classFile.length()];
in.readFully(ret);
in.close();
return ret;
} catch (IOException e) {
log.info(e.getMessage());
}
return null;
}
public class HotSwapUtil {
private static JdeLogger log = JdeLogger.getLogger("HotSwapServer");
@SuppressWarnings("all")
public static void replace(Debugger debugger, File classFile, String className) {
VirtualMachine vm = debugger.getVm();
if (vm == null) return;
if (!vm.canRedefineClasses()) return;
byte[] classBytes = loadClassFile(classFile);
if (classBytes == null) return;
List classes = vm.classesByName(className);
if (classes == null || classes.size() == 0) return;
for (int i = 0; i < classes.size(); i++) {
ReferenceType refType = (ReferenceType) classes.get(i);
HashMap map = new HashMap();
map.put(refType, classBytes);
vm.redefineClasses(map);
}
}
private static byte[] loadClassFile(File classFile) {
try {
DataInputStream in = new DataInputStream(new FileInputStream(classFile));
byte[] ret = new byte[(int) classFile.length()];
in.readFully(ret);
in.close();
return ret;
} catch (IOException e) {
log.info(e.getMessage());
}
return null;
}
}