56 lines
1.8 KiB
Python
56 lines
1.8 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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from . import _jcustomizer
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import sys as _sys
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from . import _jexception
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# This contains a customizer for closeable so that we can use the python "with"
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# statement.
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@_jcustomizer.JImplementationFor("java.lang.AutoCloseable")
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class _JCloseable(object):
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""" Customizer for ``java.lang.AutoCloseable`` and ``java.io.Closeable``
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This customizer adds support of the ``with`` operator to all Java
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classes that implement the Java ``AutoCloseable`` interface.
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Example:
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.. code-block:: python
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from java.nio.files import Files, Paths
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with Files.newInputStream(Paths.get("foo")) as fd:
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# operate on the input stream
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# Input stream closes at the end of the block.
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"""
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def __enter__(self):
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return self
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def __exit__(self, exception_type, exception_value, traceback):
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info = _sys.exc_info()
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try:
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self.close()
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except _jexception.JException as jex:
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# Eat the second exception if we are already handling one.
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if (info[0] is None):
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raise jex
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