utils.py

# -----------------------------------------------------------------------------
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# -----------------------------------------------------------------------------
# utils.py
#
# Contains utility classes and methods.
# -----------------------------------------------------------------------------


def params_initer(f):
    """
    Decorator function which is used on the ConnectParams and PoolParams
    classes. It creates the implementation object using the implementation
    class stored on the parameter class. It first, however, calls the original
    method to ensure that the keyword parameters supplied are valid (the
    original method itself does nothing).
    """

    def wrapped_f(self, *args, **kwargs):
        f(self, *args, **kwargs)
        self._impl = self._impl_class()
        if kwargs:
            self._impl.set(kwargs)

    return wrapped_f


def params_setter(f):
    """
    Decorator function which is used on the ConnectParams and PoolParams
    classes. It calls the set() method on the parameter implementation object
    with the supplied keyword arguments. It first, however, calls the original
    method to ensure that the keyword parameters supplied are valid (the
    original method itself does nothing).
    """

    def wrapped_f(self, *args, **kwargs):
        f(self, *args, **kwargs)
        self._impl.set(kwargs)

    return wrapped_f