Source Code for Module ndg.xacml.core.context.pdpinterface

 1  """NDG Security Policy Decision Point interface definition 
 2   
 3  NERC DataGrid 
 4  """ 
 5  __author__ = "P J Kershaw" 
 6  __date__ = "25/02/10" 
 7  __copyright__ = "(C) 2010 Science and Technology Facilities Council" 
 8  __contact__ = "Philip.Kershaw@stfc.ac.uk" 
 9  __license__ = "BSD - see LICENSE file in top-level directory" 
10  __contact__ = "Philip.Kershaw@stfc.ac.uk" 
11  __revision__ = "$Id: pdpinterface.py 7087 2010-06-25 11:23:09Z pjkersha $" 
12  from abc import ABCMeta, abstractmethod 
13  from ndg.xacml.core.context.request import Request 
14   
15   
16 -class PDPInterface(object): 
17      """Interface class for XACML Policy Enforcement Point""" 
18      __metaclass__ = ABCMeta 
19      __slots__ = () 
20       
21      @abstractmethod 
22 -    def evaluate(self, request): 
23          '''evaluate the input request and return an access control decision 
24          in the returned response 
25           
26          @param request: XACML context request 
27          @type request: ndg.xacml.core.context.request.Request 
28          @return: XACML context response 
29          @rtype: None (this abstract method) expecting  
30          ndg.xacml.core.context.response.Response type in implementations of this 
31          class 
32          ''' 
33          if not isinstance(request, Request): 
34              raise TypeError('Expecting %r type for input request; got %r ' 
35                              'instead' % (Request, type(request))) 
36