Provided hook, so that numbers can be parsed into custom types, such as

decimal.

3 files changed, 22 insertions, 1 deletions

diff --git a/src/zope/i18n/format.py b/src/zope/i18n/format.py
index a7e7b7a..1c291d3 100644
--- a/src/zope/i18n/format.py
+++ b/src/zope/i18n/format.py
@@ -205,6 +205,8 @@ class NumberFormat(object):
 
     implements(INumberFormat)
 
+    type = None
+
     def __init__(self, pattern=None, symbols={}):
         # setup default symbols
         self.symbols = {
@@ -299,6 +301,8 @@ class NumberFormat(object):
         if self.symbols['exponential'] in num_str:
             type = float
             num_str = num_str.replace(self.symbols['exponential'], 'E')
+        if self.type:
+            type = self.type
         return sign*type(num_str)
 
     def _format_integer(self, integer, pattern):
diff --git a/src/zope/i18n/interfaces/__init__.py b/src/zope/i18n/interfaces/__init__.py
index 494403a..91b3ea1 100644
--- a/src/zope/i18n/interfaces/__init__.py
+++ b/src/zope/i18n/interfaces/__init__.py
@@ -16,7 +16,7 @@
 $Id$
 """
 from zope.interface import Interface, Attribute
-from zope.schema import TextLine, Dict, Choice
+from zope.schema import TextLine, Dict, Choice, Field
 
 
 class II18nAware(Interface):
@@ -351,6 +351,14 @@ class INumberFormat(IFormat):
       '    Used to quote special characters in a prefix or suffix
     """
 
+    type = Field(
+        title=u'Type',
+        description=(u'The type into which a string is parsed. If ``None``, '
+                     u'then ``int`` will be used for whole numbers and '
+                     u'``float`` for decimals.'),
+        default=None,
+        required=False)
+
     symbols = Dict(
         title=u"Number Symbols",
         key_type=Choice(
diff --git a/src/zope/i18n/tests/test_formats.py b/src/zope/i18n/tests/test_formats.py
index b820abe..27d0bd4 100644
--- a/src/zope/i18n/tests/test_formats.py
+++ b/src/zope/i18n/tests/test_formats.py
@@ -15,6 +15,7 @@
 
 $Id$
 """
+import decimal
 import os
 import datetime
 import pytz
@@ -980,6 +981,14 @@ class TestNumberFormat(TestCase):
             symbols={'decimal': '.', 'group': ',', 'exponential': 'X'})
         self.assertEqual(format.parse('1.2X11', '#.#E0'), 1.2e11)
 
+    def testChangeOutputType(self):
+        format = NumberFormat()
+        format.type = decimal.Decimal
+        self.assertEqual(format.parse('23341', '###0'),
+                         decimal.Decimal('23341'))
+        self.assertEqual(format.parse('233.41', '###0.00'),
+                         decimal.Decimal('233.41'))
+
     def testFormatSimpleInteger(self):
         self.assertEqual(self.format.format(23341, '###0'),
                          '23341')