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# *****************************************************************************
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# See NOTICE file for details.
#
# *****************************************************************************
import _jpype
__all__ = ['JPackage']
class _JPackageMeta(type):
def __instancecheck__(self, other):
return isinstance(other, _jpype._JPackage)
def __subclasscheck__(self, other):
return issubclass(other, _jpype._JPackage)
class JPackage(_jpype._JPackage, metaclass=_JPackageMeta):
""" Gateway for automatic importation of Java classes.
This class allows structured access to Java packages and classes.
This functionality has been replaced by ``jpype.imports``, but is still
useful in some cases.
Only the root of the package tree needs to be declared with the ``JPackage``
constructor. Sub-packages will be created on demand.
For example, to import the w3c DOM package:
.. code-block:: python
Document = JPackage('org').w3c.dom.Document
Under some situations such as a missing jar file, the resulting object
will be a JPackage object rather than the expected java class. This
results in rather challanging debugging messages. Due to this
restriction, the ``jpype.imports`` module is preferred. To prevent these
types of errors, a package can be declares as ``strict`` which prevents
expanding package names that do not comply with Java package name
conventions.
Args:
path (str): Path into the Java class tree.
Example:
.. code-block:: python
# Alias into a library
google = JPackage("com").google
# Access members in the library
result = google.common.IntMath.pow(x,m)
"""
pass
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