def proxyForInterface(iface, originalAttribute='original'):
"""
Create a class which proxies all method calls which adhere to an interface
to another provider of that interface.
This function is intended for creating specialized proxies. The typical way
to use it is by subclassing the result::
class MySpecializedProxy(proxyForInterface(IFoo)):
def someInterfaceMethod(self, arg):
if arg == 3:
return 3
return self.original.someInterfaceMethod(arg)
@param iface: The Interface to which the resulting object will conform, and
which the wrapped object must provide.
@param originalAttribute: name of the attribute used to save the original
object in the resulting class. Default to C{original}.
@type originalAttribute: C{str}
@return: A class whose constructor takes the original object as its only
argument. Constructing the class creates the proxy.
"""
def __init__(self, original):
setattr(self, originalAttribute, original)
contents = {"__init__": __init__}
for name in iface:
contents[name] = _ProxyDescriptor(name, originalAttribute)
proxy = type("(Proxy for %s)" % (reflect.qual(iface), ), (object, ),
contents)
declarations.classImplements(proxy, iface)
return proxy
def proxyForInterface(iface, originalAttribute='original'):
"""
Create a class which proxies all method calls which adhere to an interface
to another provider of that interface.
This function is intended for creating specialized proxies. The typical way
to use it is by subclassing the result::
class MySpecializedProxy(proxyForInterface(IFoo)):
def someInterfaceMethod(self, arg):
if arg == 3:
return 3
return self.original.someInterfaceMethod(arg)
@param iface: The Interface to which the resulting object will conform, and
which the wrapped object must provide.
@param originalAttribute: name of the attribute used to save the original
object in the resulting class. Default to C{original}.
@type originalAttribute: C{str}
@return: A class whose constructor takes the original object as its only
argument. Constructing the class creates the proxy.
"""
def __init__(self, original):
setattr(self, originalAttribute, original)
contents = {"__init__": __init__}
for name in iface:
contents[name] = _ProxyDescriptor(name, originalAttribute)
proxy = type("(Proxy for %s)"
% (reflect.qual(iface),), (object,), contents)
declarations.classImplements(proxy, iface)
return proxy
def _wire():
from reqs.zope.interface.declarations import classImplements
from reqs.zope.interface.interfaces import IAttribute
classImplements(Attribute, IAttribute)
from reqs.zope.interface.interfaces import IMethod
classImplements(Method, IMethod)
from reqs.zope.interface.interfaces import IInterface
classImplements(InterfaceClass, IInterface)
from reqs.zope.interface.interfaces import ISpecification
classImplements(Specification, ISpecification)
def _wire():
from reqs.zope.interface.declarations import classImplements
from reqs.zope.interface.interfaces import IAttribute
classImplements(Attribute, IAttribute)
from reqs.zope.interface.interfaces import IMethod
classImplements(Method, IMethod)
from reqs.zope.interface.interfaces import IInterface
classImplements(InterfaceClass, IInterface)
from reqs.zope.interface.interfaces import ISpecification
classImplements(Specification, ISpecification)
