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# java classes reload support (experimental)
# Copyright 2000 Samuele Pedroni
# ?? could have problem with import pkg.jclass.inner (this should not be used in any case)
# ?? using import * with a load-set together with reloading can be confusing
# cannot be fixed => anyway import * is not for production code
__version__ = "0.3"
import sys
from org.python.core import imp,PyJavaPackage,PyJavaClass
from _jython import is_lazy as _is_lazy
import jxxload_help
class _LoaderFactory(jxxload_help.JavaLoaderFactory):
def __init__(self,path):
vfs = jxxload_help.PathVFS()
for fname in path:
vfs.addVFS(fname)
self.vfs = vfs
def makeLoader(self):
return jxxload_help.PathVFSJavaLoader(self.vfs,imp.getSyspathJavaLoader())
class _Unload:
def __init__(self,ls):
self.ls = ls
self.ls_name = ls._name
self.loader = ls._mgr.loader
def do_unload(self,pkg):
for n in pkg.__dict__.keys():
e = pkg.__dict__[n]
if isinstance(e,PyJavaClass):
if _is_lazy(e): continue
if e.classLoader is self.loader:
del pkg.__dict__[n]
if pkg.__name__:
n = self.ls_name + '.' + pkg.__name__ + '.' +n
else:
n = self.ls_name + '.' + n
if sys.modules.has_key(n): del sys.modules[n]
elif isinstance(e,PyJavaPackage):
self.do_unload(e)
def __call__(self):
if self.loader:
if self.ls._mgr.checkLoader() is self.loader:
self.do_unload(self.ls._top)
self.ls._mgr.resetLoader()
loader = self.loader
jxxload_help.DiscardHelp.discard(loader,loader.interfaces)
self.loader = None
class LoadSet:
# ?? for the moment from import * and dir do not work for LoadSet, but work for
# contained pkgs
# need java impl as PyObject
def __init__(self,name,path):
mgr = jxxload_help.PackageManager(path,_LoaderFactory(path))
self._name = name
self._mgr = mgr
self._top = mgr.topLevelPackage
def __getattr__(self,name):
try:
return getattr(self._top,name)
except:
if name == 'unload': return _Unload(self)
raise
def __repr__(self):
return "<java load-set %s>" % self._name
def unloadf(ls):
if not isinstance(ls,LoadSet): raise TypeError,"unloadf(): arg is not a load-set"
return _Unload(ls)
def makeLoadSet(name,path):
if sys.modules.has_key(name): return sys.modules[name]
sys.modules[name] = ls = LoadSet(name,path)
return ls
_reload = reload
def _do_reload(ls_name,mgr,pkg):
pkg_name = pkg.__name__
for n in pkg.__dict__.keys():
e = pkg.__dict__[n]
if isinstance(e,PyJavaClass):
if _is_lazy(e): continue
del pkg.__dict__[n]
try :
c = mgr.findClass(pkg_name,n);
if c:
pkg.__dict__[n] = c
if pkg_name:
n = ls_name + '.' + pkg_name + '.' + n
else:
n = ls_name + '.' + n
if sys.modules.has_key(n): sys.modules[n] = c
except:
pass
elif isinstance(e,PyJavaPackage):
_do_reload(ls_name,mgr,e)
def reload(ls):
if isinstance(ls,LoadSet):
ls._mgr.resetLoader()
_do_reload(ls._name,ls._mgr,ls._top)
return ls
else:
return _reload(ls)
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