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

 1  """NDG XACML one and only functions module 
 2   
 3  NERC DataGrid 
 4  """ 
 5  __author__ = "P J Kershaw" 
 6  __date__ = "01/04/10" 
 7  __copyright__ = "" 
 8  __license__ = "BSD - see LICENSE file in top-level directory" 
 9  __contact__ = "Philip.Kershaw@stfc.ac.uk" 
10  __revision__ = '$Id: round.py 8020 2012-02-23 12:35:19Z pjkersha $' 
11  from ndg.xacml.core.functions import (AbstractFunction,  
12                                        FunctionClassFactoryInterface) 
13  from ndg.xacml.core.context.exceptions import XacmlContextTypeError 
14   
15   
16 -class Round(AbstractFunction): 
17      """Base class for XACML <type>-round functions 
18       
19      @cvar FUNCTION_NS: namespace for this function 
20      @type FUNCTION_NS: string 
21      """ 
22      FUNCTION_NS = AbstractFunction.V1_0_FUNCTION_NS + 'round' 
23       
24 -    def evaluate(self, num): 
25          """Execute mathematical round up of the input number 
26           
27          @param num: number to round up 
28          @type num: int / long / float 
29          @rtype: float 
30          @raise TypeError: incorrect type for input 
31          """ 
32          try: 
33              return round(num) 
34          except TypeError, e: 
35              raise XacmlContextTypeError('Round function: %s' % e) 
36   
37       
38 -class FunctionClassFactory(FunctionClassFactoryInterface): 
39      """Class Factory for round XACML function class 
40      """ 
41 -    def __call__(self, identifier): 
42          '''Create class for the Round XACML function identifier 
43           
44          @param identifier: XACML round function identifier 
45          @type identifier: basestring 
46          @return: round function class or None if identifier doesn't match 
47          @rtype: ndg.xacml.core.functions.v1.round.Round / NoneType 
48          ''' 
49          if identifier == Round.FUNCTION_NS: 
50              return Round 
51          else: 
52              return None 
53