Source Code for Module qm.external.DocumentTemplate.DT_Raise

 1  ############################################################################## 
 2  # 
 3  # Copyright (c) 2002 Zope Corporation and Contributors. All Rights Reserved. 
 4  # 
 5  # This software is subject to the provisions of the Zope Public License, 
 6  # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution. 
 7  # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED 
 8  # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 9  # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS 
10  # FOR A PARTICULAR PURPOSE 
11  # 
12  ############################################################################## 
13  '''Raising exceptions 
14   
15     Errors can be raised from DTML using the 'raise' tag. 
16   
17     For example:: 
18   
19      <!--#if expr="condition_that_tests_input"--> 
20         <!--#raise type="Input Error"--> 
21             The value you entered is not valid 
22         <!--#/raise--> 
23      <!--#/if--> 
24   
25  ''' 
26  __rcs_id__='$Id: DT_Raise.py 1069 2008-11-13 21:55:43Z stefan $' 
27  __version__='$Revision: 1069 $'[11:-2] 
28   
29  from DT_Util import parse_params, name_param, render_blocks, str 
30   
31 -class Raise: 
32      blockContinuations=() 
33      name='raise' 
34      expr='' 
35   
36 -    def __init__(self, blocks): 
37   
38          tname, args, section = blocks[0] 
39          self.section=section.blocks 
40          args=parse_params(args, type='', expr='') 
41          self.__name__, self.expr = name_param(args, 'raise', 1, attr='type') 
42   
43 -    def render(self,md): 
44          expr=self.expr 
45          if expr is None: 
46              t=self.__name__ 
47              if t[-5:]=='Error' and __builtins__.has_key(t): 
48                  t=__builtins__[t] 
49          else: 
50              try: t=expr.eval(md) 
51              except: t='Invalid Error Type Expression' 
52   
53          try: v=render_blocks(self.section,md) 
54          except: v='Invalid Error Value' 
55   
56          raise t, v 
57   
58      __call__=render 
59