Package AccessEngine :: Module AEAccAdapter :: Class Interface

Class Interface

object --+
         |
        Interface

Base class for all interfaces.

Acts as a factory for instantiating the proper registered adapter for the given Interface subclass and subject. For example, assume INavigable is a subclass of this class. The code:

adapted_object = INavigable(some_object)

will return an object adapting some_object to the INavigable interface if such and adapter exists. If some_object has an attribute called providesInterfaces which contains INavigable, the original object will be returned. If no suitable adapter exists, an exception is raised.

The _get function does most of the work in retrieving an appropriate adapter.

Instance Methods

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__new__(interface, subject=None)
Creates an adapter instance providing the given interface for the given subject.

source code

Inherited from object: __delattr__, __getattribute__, __hash__, __init__, __reduce__, __reduce_ex__, __repr__, __setattr__, __str__

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

new(interface, subject=None)

source code

Creates an adapter instance providing the given interface for the given subject.

Parameters:

interface (Interface) - Desired interface for the subject
subject (object) - Object to adapt to the interface

Returns:

a new object with type S, a subtype of T

Raises:

AdaptationError - When no suitable adapter exists to provide the desired interface for the given subject

Overrides: object.__new__