06e7834dd5
Change-Id: I2f38e02cfa084803c5b40318a2789a236865dda6 Former-commit-id:746daf5f3e[formerlyd43a01f5d8[formerly 6afa4c1beeba55509d3222ea908595aee59a7f38]] Former-commit-id:d43a01f5d8Former-commit-id:fde925f383
131 lines
4.2 KiB
Python
131 lines
4.2 KiB
Python
##
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# This software was developed and / or modified by Raytheon Company,
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# pursuant to Contract DG133W-05-CQ-1067 with the US Government.
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#
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# U.S. EXPORT CONTROLLED TECHNICAL DATA
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# This software product contains export-restricted data whose
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# export/transfer/disclosure is restricted by U.S. law. Dissemination
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# to non-U.S. persons whether in the United States or abroad requires
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# an export license or other authorization.
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#
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# Contractor Name: Raytheon Company
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# Contractor Address: 6825 Pine Street, Suite 340
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# Mail Stop B8
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# Omaha, NE 68106
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# 402.291.0100
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#
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# See the AWIPS II Master Rights File ("Master Rights File.pdf") for
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# further licensing information.
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##
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#
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# Python import hook (PEP 302) for importing Java classes through JEP
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#
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#
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# SOFTWARE HISTORY
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#
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# Date Ticket# Engineer Description
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# ------------ ---------- ----------- --------------------------
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# 12/03/09 njensen Initial Creation.
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# 06/12/14 3262 njensen More precise java package names
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#
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#
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#
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import sys, types
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import jep
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PACKAGES = [
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'java',
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'javax',
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'com',
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'gov',
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'org',
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'net',
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'edu',
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]
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class JavaImporter:
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def __init__(self):
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pass
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#
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# Following PEP 302, this method checks if this importer applies to
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# this package/module. When python goes to import, it will loop through
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# the importers of sys.meta_path in order and use the first one that
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# returns True to load the module. If none return True, it falls back to
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# the built-in importer.
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#
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# For example, if a piece of python code has:
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#
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# from java.util import ArrayList
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#
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# that will pseudo-translate to:
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#
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# if JavaImporterInstance.find_module("java"):
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# if JavaImporterInstance.find_module("java.util"):
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# JavaImporterInstance.load_module("java.util.ArrayList")
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#
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# For a python module, this method should ideally always return False so
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# that python will fall back to its built-in importer.
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#
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def find_module(self, fullname, path=None):
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found = False
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for pkg in PACKAGES:
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if fullname == pkg or fullname.startswith(pkg + "."):
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found = True
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break
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if not found:
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return None
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return self
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def load_module(self, fullname):
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split = fullname.split('.')
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parentModule = None
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size = len(split)
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for i in range(size):
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s = split[i]
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if not parentModule:
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if sys.modules.has_key(s):
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parentModule = sys.modules[s]
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else:
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mod = sys.modules.setdefault(s, JavaModule(s))
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mod.__loader__ = self
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mod = sys.modules[s]
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parentModule = mod
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else:
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attr = None
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try:
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attr = parentModule.__getattribute__(s)
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except AttributeError:
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pass
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if attr:
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parentModule = attr
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else:
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if s[0].islower(): # it's still part of the package name
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mod = JavaModule(s)
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mod.__loader__ = self
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parentModule.__setattr__(s, mod)
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parentModule = mod
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else: # it's a java class, add it
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jclz = jep.jimport(fullname)
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parentModule.__setattr__(s, jclz)
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parentModule = jclz
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return parentModule
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class JavaModule(types.ModuleType):
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def __getattribute__(self, attr):
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if attr == '__path__':
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return 'java'
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else:
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return types.ModuleType.__getattribute__(self, attr)
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sys.modules['JavaImporter'] = sys.modules[__name__]
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sys.meta_path[:] = [JavaImporter()]
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