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Revision 1602

Added by Aaron Marcuse-Kubitza over 12 years ago

xml_func.py: _map: Factored replacing code out into new function repl(), which can also be used by other XML funcs

View differences:

lib/xml_func.py
143 143 
    except ValueError: return value # value not convertible, so can't equal null
144 144 
funcs['_nullIf'] = _nullIf
145 145 

  		




  146
  
  
    
def _map(items):


  		




  
  146
  
    
def repl(repls, value):


  		




  147
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    '''Raises error if value not in map and no special '*' entry


  		




  148
  
  
    
    @param items


  		




  149
  
  
    
        <last_entry> Value


  		




  150
  
  
    
        <other_entries> name=value Mappings


  		




  151
  
  
    
            name "*" means all other input values


  		




  152
  
  
    
            value "*" means keep input value the same


  		




  153
  
  
    
            value "" means ignore input value


  		




  
  148
  
    
    @param repls dict repl:with


  		




  
  149
  
    
        repl "*" means all other input values


  		




  
  150
  
    
        with "*" means keep input value the same


  		




  
  151
  
    
        with "" means ignore input value


  		




  154
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    '''


  		




  155
  
  
    
    items = conv_items(strings.ustr, items) # get *once* from iter, check types


  		




  156
  
  
    
    value = pop_value(items)


  		




  157
  
  
    
    if value == None: return None # input is empty


  		




  158
  
  
    
    map_ = dict(items)


  		




  159
  
  
    
    


  		




  160
  
  
    
    try: new_value = map_[value]


  		




  
  153
  
    
    try: new_value = repls[value]


  		




  161
  154
  
    
    except KeyError, e:


  		




  162
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        # Save traceback right away in case another exception raised


  		




  163
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        se = SyntaxException(e) 


  		




  164
  
  
    
        try: new_value = map_['*']


  		




  
  157
  
    
        try: new_value = repls['*']


  		




  165
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        except KeyError: raise se


  		




  166
  159
  
    
    if new_value == '*': new_value = value # '*' means keep input value the same


  		




  167
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    return util.none_if(new_value, u'') # empty map entry means None


  		




  
  161
  
    

  		




  
  162
  
    
def _map(items):


  		




  
  163
  
    
    '''See repl()


  		




  
  164
  
    
    @param items


  		




  
  165
  
    
        <last_entry> Value


  		




  
  166
  
    
        <other_entries> name=value Mappings. Special values: See repl() repls.


  		




  
  167
  
    
    '''


  		




  
  168
  
    
    items = conv_items(strings.ustr, items) # get *once* from iter, check types


  		




  
  169
  
    
    value = pop_value(items)


  		




  
  170
  
    
    if value == None: return None # input is empty


  		




  
  171
  
    
    return repl(dict(items), value)


  		




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funcs['_map'] = _map


  		




  169
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def _replace(items):


  		












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