graalpython/graalpython/lib-graalpython/java.py at master · steve-s/graalpython · GitHub

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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

# The Universal Permissive License (UPL), Version 1.0

# Subject to the condition set forth below, permission is hereby granted to any

# person obtaining a copy of this software, associated documentation and/or

# data (collectively the "Software"), free of charge and under any and all

# copyright rights in the Software, and any and all patent rights owned or

# freely licensable by each licensor hereunder covering either (i) the

# unmodified Software as contributed to or provided by such licensor, or (ii)

# the Larger Works (as defined below), to deal in both

# (a) the Software, and

# (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if

# one is included with the Software each a "Larger Work" to which the Software

# is contributed by such licensors),

# without restriction, including without limitation the rights to copy, create

# derivative works of, display, perform, and distribute the Software and make,

# use, sell, offer for sale, import, export, have made, and have sold the

# Software and the Larger Work(s), and to sublicense the foregoing rights on

# either these or other terms.

# This license is subject to the following condition:

# The above copyright notice and either this complete permission notice or at a

# minimum a reference to the UPL must be included in all copies or substantial

# portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

# SOFTWARE.

import sys

import _frozen_importlib

class JavaPackageLoader:

@staticmethod

def is_java_package(name):

try:

package = type("java.lang.Package")

return any(p.getName().startswith(name) for p in package.getPackages())

except KeyError:

if name in ("java.lang", "java.util"):

# Some well-known packages that we always allow

return True

if sys.flags.verbose:

from _warnings import warn

warn("Host lookup allowed, but java.lang.Package not available. Importing from Java cannot work.")

return False

if __graalpython__.jython_emulation_enabled:

@staticmethod

def _make_getattr(modname):

modname = modname + "."

def __getattr__(key, default=None):

if __graalpython__.host_import_enabled:

loadname = modname + key

if JavaPackageLoader.is_java_package(loadname):

return JavaPackageLoader._create_module(loadname)

else:

try:

return type(modname + key)

except KeyError:

pass

raise AttributeError(key)

return __getattr__

else:

@staticmethod

def _make_getattr(modname):

if modname.startswith("java."):

modname_wo = modname[len("java."):] + "."

else:

modname_wo = None

modname = modname + "."

def __getattr__(key, default=None):

try:

return type(modname + key)

except KeyError:

pass

if modname_wo:

try:

return type(modname_wo + key)

except KeyError:

pass

if JavaPackageLoader.is_java_package(modname + key):

return JavaPackageLoader._create_module(modname + key)

raise AttributeError(key)

return __getattr__

@staticmethod

def create_module(spec):

return JavaPackageLoader._create_module(spec.name)

@staticmethod

def _create_module(name):

newmod = _frozen_importlib._new_module(name)

newmod.__getattr__ = JavaPackageLoader._make_getattr(name)

newmod.__path__ = __path__

return newmod

@staticmethod

def exec_module(module):

pass

class JavaTypeLoader:

@staticmethod

def create_module(spec):

pass

if __graalpython__.jython_emulation_enabled:

@staticmethod

def exec_module(module):

sys.modules[module.__name__] = type(module.__name__)

else:

@staticmethod

def exec_module(module):

try:

sys.modules[module.__name__] = type(module.__name__)

except KeyError:

if module.__name__.startswith("java."):

sys.modules[module.__name__] = type(module.__name__[len("java."):])

else:

raise

class JavaImportFinder:

def is_type(self, name):

try:

type(name)

return True

except KeyError:

return False

if __graalpython__.jython_emulation_enabled:

def find_spec(self, fullname, path, target=None):

# Because of how Jython allows you to import classes that have not

# been loaded, yet, we need attempt to load types very eagerly.

if self.is_type(fullname):

# the fullname is already a type, let's load it

return _frozen_importlib.ModuleSpec(fullname, JavaTypeLoader, is_package=False)

else:

current_import_name = __graalpython__.current_import()

if current_import_name and self.is_type(current_import_name):

# We are currently handling an import that will lead to a

# Java type. The fullname is not a type itself, so it must

# be a package, not an enclosing class.

return _frozen_importlib.ModuleSpec(fullname, JavaPackageLoader, is_package=True)

else:

# We are not currently handling an import statement, and the

# fullname is not a type. Thus we can only check if it is a

# known package.

if JavaPackageLoader.is_java_package(fullname):

return _frozen_importlib.ModuleSpec(fullname, JavaPackageLoader, is_package=True)

else:

def find_spec(self, fullname, path, target=None):

if path and path == __path__:

if fullname.rpartition('.')[2].islower():

return _frozen_importlib.ModuleSpec(fullname, JavaPackageLoader, is_package=True)

else:

return _frozen_importlib.ModuleSpec(fullname, JavaTypeLoader, is_package=False)

if __graalpython__.jython_emulation_enabled:

class JarImportLoader:

def __init__(self, code):

self.code = code

def create_module(self, spec):

newmod = _frozen_importlib._new_module(spec.name)

newmod.__path__ = self.code.co_filename

return newmod

def exec_module(self, module):

exec(self.code, module.__dict__)

class JarImportFinder:

def __init__(self):

self.zipimport = __import__("zipimport")

def find_spec(self, fullname, path, target=None):

for path in sys.path:

if ".jar!" in path:

zipimport_path = path.replace(".jar!/", ".jar/").replace(".jar!", ".jar/")

zipimporter = self.zipimport.zipimporter(zipimport_path)

if zipimporter.find_spec(fullname):

if zipimporter.is_package(fullname):

return _frozen_importlib.ModuleSpec(fullname, JarImportLoader(zipimporter.get_code(fullname)), is_package=True)

else:

return _frozen_importlib.ModuleSpec(fullname, JarImportLoader(zipimporter.get_code(fullname)), is_package=False)

sys.meta_path.append(JarImportFinder())

sys.meta_path.append(JavaImportFinder())

graalpython/graalpython/lib-graalpython/java.py at master · steve-s/graalpython · GitHub

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