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