Python Components.registerAdapter方法代码示例

# 需要导入模块: from zope.interface.registry import Components [as 别名]
# 或者: from zope.interface.registry.Components import registerAdapter [as 别名]
    class JSON(object):

        def __init__(self, serializer=json.dumps, adapters=(), **kw):
            """ Any keyword arguments will be passed to the ``serializer``
            function."""
            self.serializer = serializer
            self.kw = kw
            self.components = Components()

        def add_adapter(self, type_or_iface, adapter):
            self.components.registerAdapter(adapter, (type_or_iface,),
                                            IJSONAdapter)

        def __call__(self, info):
            def _render(value, system):
                request = system.get('request')
                if request is not None:
                    response = request.response
                    ct = response.content_type
                    if ct == response.default_content_type:
                        response.content_type = 'application/json'
                default = self._make_default(request)
                return self.serializer(value, default=default, **self.kw)

            return _render

        def _make_default(self, request):
            def default(obj):
                obj_iface = providedBy(obj)
                adapters = self.components.adapters
                result = adapters.lookup((obj_iface,), IJSONAdapter,
                                         default=None)
                return result(obj, request)
            return default

# 需要导入模块: from zope.interface.registry import Components [as 别名]
# 或者: from zope.interface.registry.Components import registerAdapter [as 别名]
 def test_hit_via_sm(self):
     from zope.interface import Interface
     from zope.interface import implementer
     from zope.interface.registry import Components
     from zope.component import getGlobalSiteManager
     from zope.component.tests.examples import ConformsToIComponentLookup
     class IFoo(Interface):
         pass
     class IBar(Interface):
         pass
     @implementer(IFoo)
     class Global(object):
         __init__ = fails_if_called(self)
     @implementer(IFoo)
     class Local(object):
         def __init__(self, context):
             self.context = context
     @implementer(IBar)
     class Bar(object):
         pass
     class Context(ConformsToIComponentLookup):
         def __init__(self, sm):
             self.sitemanager = sm
     gsm = getGlobalSiteManager()
     gsm.registerAdapter(Global, (IBar,), IFoo, '')
     sm1 = Components('sm1', bases=(gsm, ))
     sm1.registerAdapter(Local, (IBar,), IFoo, '')
     bar = Bar()
     adapted = self._callFUT(bar, IFoo, context=Context(sm1))
     self.assertTrue(adapted.__class__ is Local)
     self.assertTrue(adapted.context is bar)

# 需要导入模块: from zope.interface.registry import Components [as 别名]
# 或者: from zope.interface.registry.Components import registerAdapter [as 别名]
 def test_nested(self):
     from zope.interface import Interface
     from zope.interface import implementer
     from zope.interface.registry import Components
     from zope.component import getGlobalSiteManager
     from zope.component.tests.examples import ConformsToIComponentLookup
     class IFoo(Interface):
         pass
     class IBar(Interface):
         pass
     class IBaz(Interface):
         pass
     @implementer(IBar)
     class Bar(object):
         pass
     @implementer(IBaz)
     class Baz(object):
         pass
     @implementer(IFoo)
     class Global(object):
         def __init__(self, first, second):
             self.first, self.second = first, second
     @implementer(IFoo)
     class Local(object):
         def __init__(self, first, second):
             self.first, self.second = first, second
     class Context(ConformsToIComponentLookup):
         def __init__(self, sm):
             self.sitemanager = sm
     gsm = getGlobalSiteManager()
     gsm.registerAdapter(Global, (IBar, IBaz), IFoo, '')
     sm1 = Components('sm1', bases=(gsm, ))
     sm1.registerAdapter(Local, (IBar, IBaz), IFoo, '')
     bar = Bar()
     baz = Baz()
     adapted = self._callFUT((bar, baz), IFoo, '', context=Context(sm1))
     self.assertTrue(adapted.__class__ is Local)
     self.assertTrue(adapted.first is bar)
     self.assertTrue(adapted.second is baz)

# 需要导入模块: from zope.interface.registry import Components [as 别名]
# 或者: from zope.interface.registry.Components import registerAdapter [as 别名]
class JSON(object):
    """ Renderer that returns a JSON-encoded string.

    Configure a custom JSON renderer using the
    :meth:`~pyramid.config.Configurator.add_renderer` API at application
    startup time:

    .. code-block:: python

       from pyramid.config import Configurator

       config = Configurator()
       config.add_renderer('myjson', JSON(indent=4))

    Once this renderer is registered as above, you can use
    ``myjson`` as the ``renderer=`` parameter to ``@view_config`` or
    :meth:`~pyramid.config.Configurator.add_view``:

    .. code-block:: python

       from pyramid.view import view_config

       @view_config(renderer='myjson')
       def myview(request):
           return {'greeting':'Hello world'}

    Custom objects can be serialized using the renderer by either
    implementing the ``__json__`` magic method, or by registering
    adapters with the renderer.  See
    :ref:`json_serializing_custom_objects` for more information.

    .. note::

        The default serializer uses ``json.JSONEncoder``. A different
        serializer can be specified via the ``serializer`` argument.  Custom
        serializers should accept the object, a callback ``default``, and any
        extra ``kw`` keyword arguments passed during renderer construction.
        This feature isn't widely used but it can be used to replace the
        stock JSON serializer with, say, simplejson.  If all you want to
        do, however, is serialize custom objects, you should use the method
        explained in :ref:`json_serializing_custom_objects` instead
        of replacing the serializer.

    .. versionadded:: 1.4
       Prior to this version, there was no public API for supplying options
       to the underlying serializer without defining a custom renderer.
    """

    def __init__(self, serializer=json.dumps, adapters=(), **kw):
        """ Any keyword arguments will be passed to the ``serializer``
        function."""
        self.serializer = serializer
        self.kw = kw
        self.components = Components()
        for type, adapter in adapters:
            self.add_adapter(type, adapter)

    def add_adapter(self, type_or_iface, adapter):
        """ When an object of the type (or interface) ``type_or_iface`` fails
        to automatically encode using the serializer, the renderer will use
        the adapter ``adapter`` to convert it into a JSON-serializable
        object.  The adapter must accept two arguments: the object and the
        currently active request.

        .. code-block:: python

           class Foo(object):
               x = 5

           def foo_adapter(obj, request):
               return obj.x

           renderer = JSON(indent=4)
           renderer.add_adapter(Foo, foo_adapter)

        When you've done this, the JSON renderer will be able to serialize
        instances of the ``Foo`` class when they're encountered in your view
        results."""
        
        self.components.registerAdapter(adapter, (type_or_iface,),
                                        IJSONAdapter)

    def __call__(self, info):
        """ Returns a plain JSON-encoded string with content-type
        ``application/json``. The content-type may be overridden by
        setting ``request.response.content_type``."""
        def _render(value, system):
            request = system.get('request')
            if request is not None:
                response = request.response
                ct = response.content_type
                if ct == response.default_content_type:
                    response.content_type = 'application/json'
            default = self._make_default(request)
            return self.serializer(value, default=default, **self.kw)
        
        return _render

    def _make_default(self, request):
        def default(obj):
#.........这里部分代码省略.........

# 需要导入模块: from zope.interface.registry import Components [as 别名]
# 或者: from zope.interface.registry.Components import registerAdapter [as 别名]
class TestAdapter(unittest.TestCase):

    def setUp(self):
        self.components = Components('comps')

    def test_register_and_unregister_adapter(self):
        self.components.registerAdapter(A12_1)

        multi_adapter = self.components.getMultiAdapter(
            (U1(1), U12(2)), IA1)
        self.assertEqual(multi_adapter.__class__, A12_1)
        self.assertEqual(repr(multi_adapter), 'A12_1(U1(1), U12(2))')

        self.assertTrue(self.components.unregisterAdapter(A12_1))
        self.assertRaises(
            ComponentLookupError,
            self.components.getMultiAdapter,
            (U1(1), U12(2)),
            IA1
            )

    def test_register_and_unregister_adapter_with_two_interfaces(self):
        self.assertRaises(TypeError, self.components.registerAdapter,
                          A1_12)
        self.components.registerAdapter(A1_12,
                                        provided=IA2)

        multi_adapter = self.components.getMultiAdapter((U1(1),), IA2)
        self.assertEqual(multi_adapter.__class__, A1_12)
        self.assertEqual(repr(multi_adapter), 'A1_12(U1(1))')

        self.assertRaises(TypeError, self.components.unregisterAdapter, A1_12)
        self.assertTrue(self.components.unregisterAdapter(A1_12, provided=IA2))
        self.assertRaises(ComponentLookupError,
                          self.components.getMultiAdapter, (U1(1),), IA2)

    def test_register_and_unregister_adapter_with_no_interfaces(self):
        self.assertRaises(TypeError, self.components.registerAdapter, A12_)

        self.components.registerAdapter(A12_, provided=IA2)
        multi_adapter = self.components.getMultiAdapter((U1(1), U12(2)), IA2)
        self.assertEqual(multi_adapter.__class__, A12_)
        self.assertEqual(repr(multi_adapter), 'A12_(U1(1), U12(2))')

        self.assertRaises(TypeError, self.components.unregisterAdapter, A12_)
        self.assertTrue(self.components.unregisterAdapter(A12_, provided=IA2))
        self.assertRaises(ComponentLookupError,
                          self.components.getMultiAdapter, (U1(1), U12(2)), IA2)

    def test_reg_and_unreg_adp_with_no___component_adapts___attribute(self):
        self.assertRaises(TypeError, self.components.registerAdapter, A_2)
        self.components.registerAdapter(A_2, required=[I3])
        self.assertTrue(self.components.unregisterAdapter(A_2, required=[I3]))

    def test_register_and_unregister_class_specific(self):
        self.components.registerAdapter(A_3, required=[U],
                                        info=u'Really class specific')
        self.assertTrue(self.components.unregisterAdapter(required=[U],
                                                          provided=IA3))
      
    def test_registered_adapters_and_sorting(self):
        self.components.registerAdapter(A12_1)
        self.components.registerAdapter(A1_12, provided=IA2)
        self.components.registerAdapter(A12_, provided=IA2)
        self.components.registerAdapter(A_2, required=[I3])
        self.components.registerAdapter(A_3, required=[U],
                                        info=u'Really class specific')

        sorted_adapters = sorted(self.components.registeredAdapters())
        sorted_adapters_name = map(lambda x: getattr(x, 'name'),
                                   sorted_adapters)
        sorted_adapters_provided = map(lambda x: getattr(x, 'provided'),
                                       sorted_adapters) 
        sorted_adapters_required = map(lambda x: getattr(x, 'required'),
                                       sorted_adapters)
        sorted_adapters_info = map(lambda x: getattr(x, 'info'),
                                   sorted_adapters)

        self.assertEqual(len(sorted_adapters), 5)
        self.assertEqual(sorted_adapters_name, [u'', u'', u'', u'', u''])
        self.assertEqual(sorted_adapters_provided, [IA1,
                                                    IA2,
                                                    IA2,
                                                    IA2,
                                                    IA3])

        self.assertEqual(sorted_adapters_required, [(I1, I2),
                                                    (I1, I2),
                                                    (I1,),
                                                    (I3,),
                                                    (implementedBy(U),)])
        self.assertEqual(sorted_adapters_info,
                         [u'', u'', u'', u'', u'Really class specific'])

    def test_get_none_existing_adapter(self):
        self.assertRaises(ComponentLookupError,
                          self.components.getMultiAdapter, (U(1),), IA1)

    def test_query_none_existing_adapter(self):
        self.assertTrue(self.components.queryMultiAdapter((U(1),), IA1) is None)
#.........这里部分代码省略.........