94 lines
3.3 KiB
Python
94 lines
3.3 KiB
Python
# -----------------------------------------------------------------------------
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# Copyright (c) 2020, 2023, Oracle and/or its affiliates.
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#
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# This software is dual-licensed to you under the Universal Permissive License
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# (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
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# 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
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# either license.
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#
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# If you elect to accept the software under the Apache License, Version 2.0,
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# the following applies:
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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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# https://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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# -----------------------------------------------------------------------------
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# utils.py
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#
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# Contains utility classes and methods.
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# -----------------------------------------------------------------------------
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from . import errors
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class CheckImpls:
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"""
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Decorator class which is used on the base implementation method and checks
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to see which implementation is currently being used (and therefore has no
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support for the method). An exception is raised letting the user know which
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implementation does support the method. Currently there are only two
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implementations (thick and thin) so the assumption is made that the
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implementation not currently running does support the method.
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"""
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def __init__(self, feature):
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self.feature = feature
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def __call__(self, f):
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feature = self.feature
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def wrapped_f(self, *args, **kwargs):
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class_name = type(self).__name__
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driver_type = "thin" if class_name.startswith("Thick") else "thick"
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errors._raise_err(
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errors.ERR_FEATURE_NOT_SUPPORTED,
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feature=feature,
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driver_type=driver_type,
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)
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return wrapped_f
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def params_initer(f):
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"""
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Decorator function which is used on the ConnectParams and PoolParams
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classes. It creates the implementation object using the implementation
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class stored on the parameter class. It first, however, calls the original
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method to ensure that the keyword parameters supplied are valid (the
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original method itself does nothing).
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"""
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def wrapped_f(self, *args, **kwargs):
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f(self, *args, **kwargs)
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self._impl = self._impl_class()
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if kwargs:
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self._impl.set(kwargs)
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return wrapped_f
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def params_setter(f):
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"""
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Decorator function which is used on the ConnectParams and PoolParams
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classes. It calls the set() method on the parameter implementation object
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with the supplied keyword arguments. It first, however, calls the original
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method to ensure that the keyword parameters supplied are valid (the
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original method itself does nothing).
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"""
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def wrapped_f(self, *args, **kwargs):
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f(self, *args, **kwargs)
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self._impl.set(kwargs)
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return wrapped_f
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