/*
def adapter_hook(self, provided, object, name=u'', default=None):
required = providedBy(object)
cache = self._getcache(provided, name)
factory = cache.get(required, _not_in_mapping)
if factory is _not_in_mapping:
factory = self.lookup((required, ), provided, name)
if factory is not None:
result = factory(object)
if result is not None:
return result
return default
*/
static PyObject *
_adapter_hook(lookup *self,
PyObject *provided, PyObject *object, PyObject *name,
PyObject *default_)
{
PyObject *required, *factory, *result;
required = providedBy(NULL, object);
if (required == NULL)
return NULL;
factory = _lookup1(self, required, provided, name, Py_None);
Py_DECREF(required);
if (factory == NULL)
return NULL;
if (factory != Py_None)
{
result = PyObject_CallFunctionObjArgs(factory, object, NULL);
Py_DECREF(factory);
if (result == NULL || result != Py_None)
return result;
}
else
result = factory; /* None */
if (default_ == NULL || default_ == result) /* No default specified, */
return result; /* Return None. result is owned None */
Py_DECREF(result);
Py_INCREF(default_);
return default_;
}
/*
def adapter_hook(self, provided, object, name=u'', default=None):
required = providedBy(object)
cache = self._getcache(provided, name)
factory = cache.get(required, _not_in_mapping)
if factory is _not_in_mapping:
factory = self.lookup((required, ), provided, name)
if factory is not None:
result = factory(object)
if result is not None:
return result
return default
*/
static PyObject *
_adapter_hook(lookup *self,
PyObject *provided, PyObject *object, PyObject *name,
PyObject *default_)
{
PyObject *required, *factory, *result;
#ifdef PY3K
if ( name && !PyUnicode_Check(name) )
#else
if ( name && !PyString_Check(name) && !PyUnicode_Check(name) )
#endif
{
PyErr_SetString(PyExc_ValueError,
"name is not a string or unicode");
return NULL;
}
required = providedBy(NULL, object);
if (required == NULL)
return NULL;
factory = _lookup1(self, required, provided, name, Py_None);
Py_DECREF(required);
if (factory == NULL)
return NULL;
if (factory != Py_None)
{
result = PyObject_CallFunctionObjArgs(factory, object, NULL);
Py_DECREF(factory);
if (result == NULL || result != Py_None)
return result;
}
else
result = factory; /* None */
if (default_ == NULL || default_ == result) /* No default specified, */
return result; /* Return None. result is owned None */
Py_DECREF(result);
Py_INCREF(default_);
return default_;
}
static PyObject *
Spec_providedBy(PyObject *self, PyObject *ob)
{
PyObject *decl, *item;
decl = providedBy(NULL, ob);
if (decl == NULL)
return NULL;
if (PyObject_TypeCheck(decl, &SpecType))
item = Spec_extends(decl, self);
else
/* decl is probably a security proxy. We have to go the long way
around.
*/
item = PyObject_CallFunctionObjArgs(decl, self, NULL);
Py_DECREF(decl);
return item;
}
/*
def __adapt__(self, obj):
"""Adapt an object to the reciever
"""
if self.providedBy(obj):
return obj
for hook in adapter_hooks:
adapter = hook(self, obj)
if adapter is not None:
return adapter
*/
static PyObject *
__adapt__(PyObject *self, PyObject *obj)
{
PyObject *decl, *args, *adapter;
int implements, i, l;
decl = providedBy(NULL, obj);
if (decl == NULL)
return NULL;
if (PyObject_TypeCheck(decl, &SpecType))
{
PyObject *implied;
implied = inst_attr(decl, str_implied);
if (implied == NULL)
{
Py_DECREF(decl);
return NULL;
}
implements = PyDict_GetItem(implied, self) != NULL;
Py_DECREF(decl);
}
else
{
/* decl is probably a security proxy. We have to go the long way
around.
*/
PyObject *r;
r = PyObject_CallFunctionObjArgs(decl, self, NULL);
Py_DECREF(decl);
if (r == NULL)
return NULL;
implements = PyObject_IsTrue(r);
Py_DECREF(r);
}
if (implements)
{
Py_INCREF(obj);
return obj;
}
l = PyList_GET_SIZE(adapter_hooks);
args = PyTuple_New(2);
if (args == NULL)
return NULL;
Py_INCREF(self);
PyTuple_SET_ITEM(args, 0, self);
Py_INCREF(obj);
PyTuple_SET_ITEM(args, 1, obj);
for (i = 0; i < l; i++)
{
adapter = PyObject_CallObject(PyList_GET_ITEM(adapter_hooks, i), args);
if (adapter == NULL || adapter != Py_None)
{
Py_DECREF(args);
return adapter;
}
Py_DECREF(adapter);
}
Py_DECREF(args);
Py_INCREF(Py_None);
return Py_None;
}
