Source Code for Module ndg.xacml.core.functions.v1.bag

 1  """NDG XACML string bag function module 
 2   
 3  NERC DataGrid 
 4  """ 
 5  __author__ = "P J Kershaw" 
 6  __date__ = "31/03/10" 
 7  __copyright__ = "" 
 8  __license__ = "BSD - see LICENSE file in top-level directory" 
 9  __contact__ = "Philip.Kershaw@stfc.ac.uk" 
10  __revision__ = '$Id: bag.py 7955 2011-12-21 18:29:45Z rwilkinson $' 
11  from ndg.xacml.utils import TypedList as Bag 
12  from ndg.xacml.core.functions import AbstractFunction, FunctionClassFactoryBase 
13   
14   
15 -class BagBase(AbstractFunction): 
16      """Abstract bag function for all types of bag function 
17       
18      urn:oasis:names:tc:xacml:1.0:function:<type>-bag 
19       
20      @cvar TYPE: attribute type for the given implementation.  Derived classes 
21      should set appropriately 
22      @type TYPE: NoneType 
23       
24      @cvar FUNCTION_SUFFIX: suffix for all bag function class names 
25      @type FUNCTION_SUFFIX: string 
26       
27      @cvar FUNCTION_NS_SUFFIX: generic suffix for at least one member of function 
28      URNs 
29      @type FUNCTION_NS_SUFFIX: string 
30      """ 
31      TYPE = None 
32      FUNCTION_SUFFIX = 'Bag' 
33      FUNCTION_NS_SUFFIX = '-bag' 
34       
35 -    def evaluate(self, *args): 
36          """return inputs into a bag 
37           
38          @param args: inputs to add to bag 
39          @type args: tuple 
40          @return: True if strings match, False otherwise 
41          @rtype: bool 
42          """ 
43          bag = Bag(self.__class__.TYPE) 
44          for i in args: 
45              if not isinstance(i, self.__class__.TYPE): 
46                  raise TypeError('Expecting %r derived type for bag element; ' 
47                                  'got %r' % (self.__class__.TYPE, type(i))) 
48              bag.append(i) 
49            
50          return bag 
51   
52   
53 -class FunctionClassFactory(FunctionClassFactoryBase): 
54      """Class Factory for *-bag XACML function classes 
55       
56      @cvar FUNCTION_NAMES: bag function URNs 
57      @type FUNCTION_NAMES: tuple 
58       
59      @cvar FUNCTION_NS_SUFFIX: generic suffix for bag function URNs 
60      @type FUNCTION_NS_SUFFIX: string 
61       
62      @cvar FUNCTION_BASE_CLASS: base class for all bag function classes 
63      @type FUNCTION_BASE_CLASS: ndg.xacml.core.functions.v1.BagBase 
64      """ 
65      FUNCTION_NAMES = ( 
66          'urn:oasis:names:tc:xacml:1.0:function:string-bag', 
67          'urn:oasis:names:tc:xacml:1.0:function:boolean-bag', 
68          'urn:oasis:names:tc:xacml:1.0:function:integer-bag', 
69          'urn:oasis:names:tc:xacml:1.0:function:double-bag', 
70          'urn:oasis:names:tc:xacml:1.0:function:time-bag', 
71          'urn:oasis:names:tc:xacml:1.0:function:date-bag', 
72          'urn:oasis:names:tc:xacml:1.0:function:dateTime-bag', 
73          'urn:oasis:names:tc:xacml:1.0:function:anyURI-bag', 
74          'urn:oasis:names:tc:xacml:1.0:function:hexBinary-bag', 
75          'urn:oasis:names:tc:xacml:1.0:function:base64Binary-bag', 
76          'urn:oasis:names:tc:xacml:1.0:function:dayTimeDuration-bag', 
77          'urn:oasis:names:tc:xacml:1.0:function:yearMonthDuration-bag', 
78          'urn:oasis:names:tc:xacml:1.0:function:x500Name-bag', 
79          'urn:oasis:names:tc:xacml:1.0:function:rfc822Name-bag', 
80      ) 
81      FUNCTION_NS_SUFFIX = '-bag' 
82      FUNCTION_BASE_CLASS = BagBase 
83