refactore carry_out_calculation + test + documentation

test/test_option_calculation.py

@@ -4,7 +4,7 @@ from py.test import raises
 from tiramisu.setting import groups
 from tiramisu.config import Config
 from tiramisu.option import ChoiceOption, BoolOption, IntOption, FloatOption, \
-    StrOption, OptionDescription
+    StrOption, OptionDescription, SymLinkOption
 from tiramisu.error import PropertiesOptionError, ConflictError, SlaveError, ConfigError
 
 
@@ -12,11 +12,19 @@ def return_val():
     return 'val'
 
 
-def return_list():
+def return_concat(*args):
+    return '.'.join(list(args))
+
+
+def return_list(value=None):
     return ['val', 'val']
 
 
-def return_value(value):
+def return_list2(*args):
+    return list(args)
+
+
+def return_value(value=None):
     return value
 
 
@@ -298,18 +306,73 @@ def test_callback():
 
 def test_callback_value():
     val1 = StrOption('val1', "", 'val')
-    val2 = StrOption('val2', "", callback=return_value, callback_params={'': (('val1', False),)})
+    val2 = StrOption('val2', "", callback=return_value, callback_params={'': ((val1, False),)})
-    maconfig = OptionDescription('rootconfig', '', [val1, val2])
+    val3 = StrOption('val3', "", callback=return_value, callback_params={'': ('yes',)})
+    val4 = StrOption('val4', "", callback=return_value, callback_params={'value': ((val1, False),)})
+    val5 = StrOption('val5', "", callback=return_value, callback_params={'value': ('yes',)})
+    maconfig = OptionDescription('rootconfig', '', [val1, val2, val3, val4, val5])
     cfg = Config(maconfig)
     cfg.read_write()
     assert cfg.val1 == 'val'
     assert cfg.val2 == 'val'
+    assert cfg.val4 == 'val'
     cfg.val1 = 'new-val'
     assert cfg.val1 == 'new-val'
     assert cfg.val2 == 'new-val'
+    assert cfg.val4 == 'new-val'
     del(cfg.val1)
     assert cfg.val1 == 'val'
     assert cfg.val2 == 'val'
+    assert cfg.val3 == 'yes'
+    assert cfg.val4 == 'val'
+    assert cfg.val5 == 'yes'
+
+
+def test_callback_value_tuple():
+    val1 = StrOption('val1', "", 'val1')
+    val2 = StrOption('val2', "", 'val2')
+    val3 = StrOption('val3', "", callback=return_concat, callback_params={'': ((val1, False), (val2, False))})
+    val4 = StrOption('val4', "", callback=return_concat, callback_params={'': ('yes', 'no')})
+    raises(ValueError, "StrOption('val4', '', callback=return_concat, callback_params={'value': ('yes', 'no')})")
+    maconfig = OptionDescription('rootconfig', '', [val1, val2, val3, val4])
+    cfg = Config(maconfig)
+    cfg.read_write()
+    assert cfg.val1 == 'val1'
+    assert cfg.val2 == 'val2'
+    assert cfg.val3 == 'val1.val2'
+    assert cfg.val4 == 'yes.no'
+    cfg.val1 = 'new-val'
+    assert cfg.val3 == 'new-val.val2'
+    del(cfg.val1)
+    assert cfg.val3 == 'val1.val2'
+
+
+def test_callback_value_force_permissive():
+    val1 = StrOption('val1', "", 'val', properties=('disabled',))
+    val2 = StrOption('val2', "", callback=return_value, callback_params={'': ((val1, False),)})
+    val3 = StrOption('val3', "", callback=return_value, callback_params={'': ((val1, True),)})
+    maconfig = OptionDescription('rootconfig', '', [val1, val2, val3])
+    cfg = Config(maconfig)
+    cfg.read_only()
+    raises(ConfigError, "cfg.val2")
+    assert cfg.val3 is None
+
+
+def test_callback_symlink():
+    val1 = StrOption('val1', "", 'val')
+    val2 = SymLinkOption('val2', val1)
+    val3 = StrOption('val3', "", callback=return_value, callback_params={'': ((val2, False),)})
+    maconfig = OptionDescription('rootconfig', '', [val1, val2, val3])
+    cfg = Config(maconfig)
+    cfg.read_write()
+    assert cfg.val1 == 'val'
+    assert cfg.val3 == 'val'
+    cfg.val1 = 'new-val'
+    assert cfg.val1 == 'new-val'
+    assert cfg.val3 == 'new-val'
+    del(cfg.val1)
+    assert cfg.val1 == 'val'
+    assert cfg.val3 == 'val'
 
 
 def test_callback_list():
@@ -336,21 +399,28 @@ def test_callback_multi():
 
 def test_callback_multi_value():
     val1 = StrOption('val1', "", ['val'], multi=True)
-    val2 = StrOption('val2', "", multi=True, callback=return_value, callback_params={'': (('val1', False),)})
+    val2 = StrOption('val2', "", multi=True, callback=return_value, callback_params={'': ((val1, False),)})
-    maconfig = OptionDescription('rootconfig', '', [val1, val2])
+    val3 = StrOption('val3', "", multi=True, callback=return_value, callback_params={'': ('yes',)})
+    val4 = StrOption('val4', "", multi=True, callback=return_list2, callback_params={'': ((val1, False), 'yes')})
+    maconfig = OptionDescription('rootconfig', '', [val1, val2, val3, val4])
     cfg = Config(maconfig)
     cfg.read_write()
     assert cfg.val1 == ['val']
     assert cfg.val2 == ['val']
+    assert cfg.val4 == ['val', 'yes']
     cfg.val1 = ['new-val']
     assert cfg.val1 == ['new-val']
     assert cfg.val2 == ['new-val']
+    assert cfg.val4 == ['new-val', 'yes']
     cfg.val1.append('new-val2')
     assert cfg.val1 == ['new-val', 'new-val2']
     assert cfg.val2 == ['new-val', 'new-val2']
+    assert cfg.val4 == ['new-val', 'yes', 'new-val2', 'yes']
     del(cfg.val1)
     assert cfg.val1 == ['val']
     assert cfg.val2 == ['val']
+    assert cfg.val3 == ['yes']
+    assert cfg.val4 == ['val', 'yes']
 
 
 def test_callback_multi_list():
@@ -455,41 +525,67 @@ def test_callback_master_and_slaves_slave_list():
 
 def test_callback_master_and_slaves_value():
     val1 = StrOption('val1', "", multi=True)
-    val2 = StrOption('val2', "", multi=True, callback=return_value, callback_params={'': (('val1.val1', False),)})
+    val2 = StrOption('val2', "", multi=True, callback=return_value, callback_params={'': ((val1, False),)})
-    interface1 = OptionDescription('val1', '', [val1, val2])
+    val3 = StrOption('val3', "", multi=True, callback=return_value, callback_params={'': ('yes',)})
+    val4 = StrOption('val4', '', multi=True, default=['val10', 'val11'])
+    val5 = StrOption('val5', "", multi=True, callback=return_value, callback_params={'': ((val4, False),)})
+    interface1 = OptionDescription('val1', '', [val1, val2, val3, val5])
     interface1.impl_set_group_type(groups.master)
-    maconfig = OptionDescription('rootconfig', '', [interface1])
+    maconfig = OptionDescription('rootconfig', '', [interface1, val4])
     cfg = Config(maconfig)
     cfg.read_write()
     assert cfg.val1.val1 == []
     assert cfg.val1.val2 == []
+    assert cfg.val1.val3 == []
+    assert cfg.val1.val5 == []
     #
     cfg.val1.val1 = ['val1']
     assert cfg.val1.val1 == ['val1']
     assert cfg.val1.val2 == ['val1']
+    assert cfg.val1.val3 == ['yes']
+    assert cfg.val1.val5 == ['val10']
     #
     cfg.val1.val1.append('val2')
     assert cfg.val1.val1 == ['val1', 'val2']
     assert cfg.val1.val2 == ['val1', 'val2']
+    assert cfg.val1.val3 == ['yes', 'yes']
+    assert cfg.val1.val5 == ['val10', 'val11']
     #
     cfg.val1.val1 = ['val1', 'val2', 'val3']
     assert cfg.val1.val1 == ['val1', 'val2', 'val3']
     assert cfg.val1.val2 == ['val1', 'val2', 'val3']
+    assert cfg.val1.val3 == ['yes', 'yes', 'yes']
+    assert cfg.val1.val5 == ['val10', 'val11', None]
     #
     cfg.val1.val1.pop(2)
     assert cfg.val1.val1 == ['val1', 'val2']
     assert cfg.val1.val2 == ['val1', 'val2']
+    assert cfg.val1.val3 == ['yes', 'yes']
+    assert cfg.val1.val5 == ['val10', 'val11']
     #
     cfg.val1.val2 = ['val2', 'val2']
+    cfg.val1.val3 = ['val2', 'val2']
+    cfg.val1.val5 = ['val2', 'val2']
     assert cfg.val1.val2 == ['val2', 'val2']
+    assert cfg.val1.val3 == ['val2', 'val2']
+    assert cfg.val1.val5 == ['val2', 'val2']
     #
     cfg.val1.val1.append('val3')
     assert cfg.val1.val2 == ['val2', 'val2', 'val3']
+    assert cfg.val1.val3 == ['val2', 'val2', 'yes']
+    assert cfg.val1.val5 == ['val2', 'val2', None]
+    cfg.cfgimpl_get_settings().remove('cache')
+    cfg.val4 = ['val10', 'val11', 'val12']
+    #if value is already set, not updated !
+    cfg.val1.val1.pop(2)
+    cfg.val1.val1.append('val3')
+    cfg.val1.val1 = ['val1', 'val2', 'val3']
+    assert cfg.val1.val5 == ['val2', 'val2', 'val12']
 
 
 def test_callback_hidden():
     opt1 = BoolOption('opt1', '')
-    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': (('od1.opt1', False),)})
+    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': ((opt1, False),)})
     od1 = OptionDescription('od1', '', [opt1], properties=('hidden',))
     od2 = OptionDescription('od2', '', [opt2])
     maconfig = OptionDescription('rootconfig', '', [od1, od2])
@@ -502,7 +598,7 @@ def test_callback_hidden():
 
 def test_callback_two_disabled():
     opt1 = BoolOption('opt1', '', properties=('disabled',))
-    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': (('od1.opt1', False),)}, properties=('disabled',))
+    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': ((opt1, False),)}, properties=('disabled',))
     od1 = OptionDescription('od1', '', [opt1])
     od2 = OptionDescription('od2', '', [opt2])
     maconfig = OptionDescription('rootconfig', '', [od1, od2])
@@ -513,7 +609,7 @@ def test_callback_two_disabled():
 
 def test_callback_calculating_disabled():
     opt1 = BoolOption('opt1', '', properties=('disabled',))
-    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': (('od1.opt1', False),)})
+    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': ((opt1, False),)})
     od1 = OptionDescription('od1', '', [opt1])
     od2 = OptionDescription('od2', '', [opt2])
     maconfig = OptionDescription('rootconfig', '', [od1, od2])
@@ -524,7 +620,7 @@ def test_callback_calculating_disabled():
 
 def test_callback_calculating_mandatory():
     opt1 = BoolOption('opt1', '', properties=('disabled',))
-    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': (('od1.opt1', False),)}, properties=('mandatory',))
+    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': ((opt1, False),)}, properties=('mandatory',))
     od1 = OptionDescription('od1', '', [opt1])
     od2 = OptionDescription('od2', '', [opt2])
     maconfig = OptionDescription('rootconfig', '', [od1, od2])
@@ -535,10 +631,47 @@ def test_callback_calculating_mandatory():
 
 def test_callback_two_disabled_multi():
     opt1 = BoolOption('opt1', '', properties=('disabled',))
-    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': (('od1.opt1', False),)}, properties=('disabled',), multi=True)
+    opt2 = BoolOption('opt2', '', callback=return_value, callback_params={'': ((opt1, False),)}, properties=('disabled',), multi=True)
     od1 = OptionDescription('od1', '', [opt1])
     od2 = OptionDescription('od2', '', [opt2])
     maconfig = OptionDescription('rootconfig', '', [od1, od2])
     cfg = Config(maconfig)
     cfg.read_write()
     raises(PropertiesOptionError, 'cfg.od2.opt2')
+
+
+def test_callback_multi_list_params():
+    val1 = StrOption('val1', "", multi=True, default=['val1', 'val2'])
+    val2 = StrOption('val2', "", multi=True, callback=return_list, callback_params={'': ((val1, False),)})
+    oval2 = OptionDescription('val2', '', [val2])
+    maconfig = OptionDescription('rootconfig', '', [val1, oval2])
+    cfg = Config(maconfig)
+    cfg.read_write()
+    assert cfg.val2.val2 == ['val', 'val', 'val', 'val']
+
+
+def test_callback_multi_list_params_key():
+    val1 = StrOption('val1', "", multi=True, default=['val1', 'val2'])
+    val2 = StrOption('val2', "", multi=True, callback=return_list, callback_params={'value': ((val1, False),)})
+    oval2 = OptionDescription('val2', '', [val2])
+    maconfig = OptionDescription('rootconfig', '', [val1, oval2])
+    cfg = Config(maconfig)
+    cfg.read_write()
+    assert cfg.val2.val2 == ['val', 'val', 'val', 'val']
+
+
+def test_callback_multi_multi():
+    val1 = StrOption('val1', "", multi=True, default=['val1', 'val2', 'val3'])
+    val2 = StrOption('val2', "", multi=True, default=['val11', 'val12'])
+    val3 = StrOption('val3', "", default='val4')
+    val4 = StrOption('val4', "", multi=True, callback=return_list2, callback_params={'': ((val1, False), (val2, False))})
+    val5 = StrOption('val5', "", multi=True, callback=return_list2, callback_params={'': ((val1, False), (val3, False))})
+    val6 = StrOption('val6', "", multi=True, default=['val21', 'val22', 'val23'])
+    val7 = StrOption('val7', "", multi=True, callback=return_list2, callback_params={'': ((val1, False), (val6, False))})
+    raises(ValueError, "StrOption('val8', '', multi=True, callback=return_list2, callback_params={'value': ((val1, False), (val6, False))})")
+    maconfig = OptionDescription('rootconfig', '', [val1, val2, val3, val4, val5, val6, val7])
+    cfg = Config(maconfig)
+    cfg.read_write()
+    raises(ConfigError, "cfg.val4")
+    assert cfg.val5 == ['val1', 'val4', 'val2', 'val4', 'val3', 'val4']
+    assert cfg.val7 == ['val1', 'val21', 'val2', 'val22', 'val3', 'val23']

test/test_option_validator.py

@@ -0,0 +1,59 @@
+import autopath
+from py.test import raises
+
+from tiramisu.config import Config
+from tiramisu.option import StrOption, OptionDescription
+from tiramisu.error import ConfigError
+
+
+def return_true(value, param=None):
+    if value == 'val' and param in [None, 'yes']:
+        return True
+
+
+def return_false(value, param=None):
+    if value == 'val' and param in [None, 'yes']:
+        return False
+
+
+def return_val(value, param=None):
+    return 'val'
+
+
+def test_validator():
+    opt1 = StrOption('opt1', '', validator=return_true, default='val')
+    raises(ValueError, "StrOption('opt2', '', validator=return_false, default='val')")
+    raises(ConfigError, "StrOption('opt3', '', validator=return_val, default='val')")
+    opt2 = StrOption('opt2', '', validator=return_false)
+    opt3 = StrOption('opt3', '', validator=return_val)
+    root = OptionDescription('root', '', [opt1, opt2, opt3])
+    cfg = Config(root)
+    assert cfg.opt1 == 'val'
+    raises(ValueError, "cfg.opt2 = 'val'")
+    raises(ConfigError, "cfg.opt3 = 'val'")
+
+
+def test_validator_params():
+    opt1 = StrOption('opt1', '', validator=return_true, validator_params={'': ('yes',)}, default='val')
+    raises(ValueError, "StrOption('opt2', '', validator=return_false, validator_params={'': ('yes',)}, default='val')")
+    raises(ConfigError, "StrOption('opt3', '', validator=return_val, validator_params={'': ('yes',)}, default='val')")
+    opt2 = StrOption('opt2', '', validator=return_false, validator_params={'': ('yes',)})
+    opt3 = StrOption('opt3', '', validator=return_val, validator_params={'': ('yes',)})
+    root = OptionDescription('root', '', [opt1, opt2, opt3])
+    cfg = Config(root)
+    assert cfg.opt1 == 'val'
+    raises(ValueError, "cfg.opt2 = 'val'")
+    raises(ConfigError, "cfg.opt3 = 'val'")
+
+
+def test_validator_params_key():
+    opt1 = StrOption('opt1', '', validator=return_true, validator_params={'param': ('yes',)}, default='val')
+    raises(TypeError, "StrOption('opt2', '', validator=return_true, validator_params={'param_unknown': ('yes',)}, default='val')")
+    root = OptionDescription('root', '', [opt1])
+    cfg = Config(root)
+    assert cfg.opt1 == 'val'
+
+
+def test_validator_params_option():
+    opt0 = StrOption('opt0', '', default='val')
+    raises(ValueError, "opt1 = StrOption('opt1', '', validator=return_true, validator_params={'': ((opt0, False),)}, default='val')")

tiramisu/autolib.py

@@ -23,11 +23,9 @@ from tiramisu.error import PropertiesOptionError, ConfigError
 from tiramisu.i18n import _
 # ____________________________________________________________
 
-def carry_out_calculation(name,
+
-                          config,
+def carry_out_calculation(name, config, callback, callback_params,
-                          callback,
+                          index=None, max_len=None):
-                          callback_params,
-                          index=None):
     """a function that carries out a calculation for an option's value
 
     :param name: the option name (`opt._name`)
@@ -40,36 +38,104 @@ def carry_out_calculation(name,
     :type callback_params: dict
     :param index: if an option is multi, only calculates the nth value
     :type index: int
+    :param max_len: max length for a multi
+    :type max_len: int
+
+    * if no callback_params:
+      => calculate()
+
+    * if callback_params={'': ('yes',)}
+      => calculate('yes')
+
+    * if callback_params={'value': ('yes',)}
+      => calculate(value='yes')
+
+    * if callback_params={'': ('yes', 'no')}
+      => calculate('yes', 'no')
+
+    * if callback_params={'value': ('yes', 'no')}
+      => ValueError()
+
+    * if callback_params={'': ((opt1, False),)}
+
+       - a simple option:
+         opt1 == 11
+         => calculate(11)
+
+       - a multi option:
+         opt1 == [1, 2, 3]
+         => calculate(1)
+         => calculate(2)
+         => calculate(3)
+
+    * if callback_params={'value': ((opt1, False),)}
+
+       - a simple option:
+         opt1 == 11
+         => calculate(value=11)
+
+       - a multi option:
+         opt1 == [1, 2, 3]
+         => calculate(value=1)
+         => calculate(value=2)
+         => calculate(value=3)
+
+    * if callback_params={'': ((opt1, False), (opt2, False))}
+
+      - a multi option with a simple option
+          opt1 == [1, 2, 3]
+          opt2 == 11
+          => calculate(1, 11)
+          => calculate(2, 11)
+          => calculate(3, 11)
+
+      - a multi option with an other multi option but with same length
+          opt1 == [1, 2, 3]
+          opt2 == [11, 12, 13]
+          callback_params={'': ((opt1, False), (opt2, False))}
+          => calculate(1, 11)
+          => calculate(2, 12)
+          => calculate(3, 13)
+
+      - a multi option with an other multi option but with different length
+          opt1 == [1, 2, 3]
+          opt2 == [11, 12]
+          callback_params={'': ((opt1, False), (opt2, False))}
+          => ConfigError()
+
+    * if callback_params={'value': ((opt1, False), (opt2, False))}
+      => ConfigError()
+
+    If index is not None, return a value, otherwise return:
+
+    * a list if one parameters have multi option
+    * a value otherwise
+
+    If calculate return list, this list is extend to return value.
     """
-    #callback, callback_params = option.getcallback()
-    #if callback_params is None:
-    #    callback_params = {}
     tcparams = {}
     one_is_multi = False
     len_multi = 0
 
-    for key, values in callback_params.items():
+    for key, callbacks in callback_params.items():
-        for value in values:
+        for callbk in callbacks:
-            if type(value) == tuple:
+            if isinstance(callbk, tuple):
-                path, check_disabled = value
+                option, force_permissive = callbk
-                if config is None:
+                # get value
-                    if check_disabled:
-                        continue
-                    raise ConfigError(_('no config specified but needed'))
                 try:
-                    opt_value = config._getattr(path, force_permissive=True)
+                    path = config.cfgimpl_get_description().impl_get_path_by_opt(option)
-                    opt = config.unwrap_from_path(path, force_permissive=True)
+                    value = config._getattr(path, force_permissive=True)
                 except PropertiesOptionError as err:
-                    if check_disabled:
+                    if force_permissive:
                         continue
                     raise ConfigError(_('unable to carry out a calculation, '
                                         'option {0} has properties: {1} for: '
-                                        '{2}').format(path, err.proptype,
+                                        '{2}').format(option._name, err.proptype,
                                                       name))
-                is_multi = opt.impl_is_multi()
+                is_multi = option.impl_is_multi()
                 if is_multi:
-                    if opt_value is not None:
+                    if value is not None:
-                        len_value = len(opt_value)
+                        len_value = len(value)
                         if len_multi != 0 and len_multi != len_value:
                             raise ConfigError(_('unable to carry out a '
                                               'calculation, option value with'
@@ -77,16 +143,23 @@ def carry_out_calculation(name,
                                               'length for: {0}').format(name))
                         len_multi = len_value
                     one_is_multi = True
-                tcparams.setdefault(key, []).append((opt_value, is_multi))
+                tcparams.setdefault(key, []).append((value, is_multi))
             else:
-                tcparams.setdefault(key, []).append((value, False))
+                tcparams.setdefault(key, []).append((callbk, False))
 
     if one_is_multi:
         ret = []
         if index:
-            range_ = [index]
+            if index < len_multi:
+                range_ = [index]
+            else:
+                range_ = []
+                ret = None
         else:
-            range_ = range(len_multi)
+            if max_len and max_len < len_multi:
+                range_ = range(max_len)
+            else:
+                range_ = range(len_multi)
         for incr in range_:
             tcp = {}
             params = []
@@ -97,15 +170,9 @@ def carry_out_calculation(name,
                         if key == '':
                             params.append(value[incr])
                         else:
-                            if len(value) > incr:
+                            tcp[key] = value[incr]
-                                tcp[key] = value[incr]
-                            else:
-                                tcp[key] = ''
                     else:
-                        if key == '':
+                        params.append(value)
-                            params.append(value)
-                        else:
-                            tcp[key] = value
             calc = calculate(name, callback, params, tcp)
             if index:
                 ret = calc
@@ -114,7 +181,6 @@ def carry_out_calculation(name,
                     ret.extend(calc)
                 else:
                     ret.append(calc)
-
         return ret
     else:
         tcp = {}
@@ -130,7 +196,6 @@ def carry_out_calculation(name,
 
 
 def calculate(name, callback, params, tcparams):
-    # FIXME we don't need the option's name down there.
     """wrapper that launches the 'callback'
 
     :param callback: callback name

tiramisu/option.py

@@ -26,7 +26,7 @@ from copy import copy, deepcopy
 from types import FunctionType
 from IPy import IP
 
-from tiramisu.error import ConflictError
+from tiramisu.error import ConflictError, ConfigError
 from tiramisu.setting import groups, multitypes
 from tiramisu.i18n import _
 from tiramisu.autolib import carry_out_calculation
@@ -97,8 +97,8 @@ class BaseOption(object):
         "frozen" (which has noting to do with the high level "freeze"
         propertie or "read_only" property)
         """
-        if not name.startswith('_state') and \
+        if not name.startswith('_state') and name not in ('_cache_paths',
-           name not in ('_cache_paths', '_consistencies'):
+                                                          '_consistencies'):
             is_readonly = False
             # never change _name
             if name == '_name':
@@ -327,7 +327,7 @@ class Option(BaseOption):
 
     def __init__(self, name, doc, default=None, default_multi=None,
                  requires=None, multi=False, callback=None,
-                 callback_params=None, validator=None, validator_args=None,
+                 callback_params=None, validator=None, validator_params=None,
                  properties=None):
         """
         :param name: the option's name
@@ -344,18 +344,15 @@ class Option(BaseOption):
         :param callback_params: the callback's parameter
         :param validator: the name of a function which stands for a custom
                           validation of the value
-        :param validator_args: the validator's parameters
+        :param validator_params: the validator's parameters
         :param properties: tuple of default properties
 
         """
         super(Option, self).__init__(name, doc, requires, properties)
         self._multi = multi
         if validator is not None:
-            if type(validator) != FunctionType:
+            validate_callback(validator, validator_params, 'validator')
-                raise TypeError(_("validator must be a function"))
+            self._validator = (validator, validator_params)
-            if validator_args is None:
-                validator_args = {}
-            self._validator = (validator, validator_args)
         else:
             self._validator = None
         if not self._multi and default_multi is not None:
@@ -377,11 +374,7 @@ class Option(BaseOption):
                              "no callback defined"
                              " yet for option {0}").format(name))
         if callback is not None:
-            if type(callback) != FunctionType:
+            validate_callback(callback, callback_params, 'callback')
-                raise ValueError('callback must be a function')
-            if callback_params is not None and \
-                    not isinstance(callback_params, dict):
-                raise ValueError('callback_params must be a dict')
             self._callback = (callback, callback_params)
         else:
             self._callback = None
@@ -448,11 +441,23 @@ class Option(BaseOption):
 
         def val_validator(val):
             if self._validator is not None:
-                callback_params = deepcopy(self._validator[1])
+                if self._validator[1] is not None:
-                callback_params.setdefault('', []).insert(0, val)
+                    validator_params = deepcopy(self._validator[1])
-                return carry_out_calculation(self._name, config=context,
+                    if '' in validator_params:
-                                             callback=self._validator[0],
+                        lst = list(validator_params[''])
-                                             callback_params=callback_params)
+                        lst.insert(0, val)
+                        validator_params[''] = tuple(lst)
+                    else:
+                        validator_params[''] = (val,)
+                else:
+                    validator_params = {'': (val,)}
+                ret = carry_out_calculation(self._name, config=context,
+                                            callback=self._validator[0],
+                                            callback_params=validator_params)
+                if ret not in [False, True]:
+                    raise ConfigError(_('validator should return a boolean, '
+                                        'not {0}').format(ret))
+                return ret
             else:
                 return True
 
@@ -566,7 +571,7 @@ class ChoiceOption(Option):
     def __init__(self, name, doc, values, default=None, default_multi=None,
                  requires=None, multi=False, callback=None,
                  callback_params=None, open_values=False, validator=None,
-                 validator_args=None, properties=()):
+                 validator_params=None, properties=()):
         """
         :param values: is a list of values the option can possibly take
         """
@@ -584,7 +589,7 @@ class ChoiceOption(Option):
                                            requires=requires,
                                            multi=multi,
                                            validator=validator,
-                                           validator_args=validator_args,
+                                           validator_params=validator_params,
                                            properties=properties)
 
     def impl_get_values(self):
@@ -702,7 +707,7 @@ class IPOption(Option):
 
     def __init__(self, name, doc, default=None, default_multi=None,
                  requires=None, multi=False, callback=None,
-                 callback_params=None, validator=None, validator_args=None,
+                 callback_params=None, validator=None, validator_params=None,
                  properties=None, only_private=False):
         self._only_private = only_private
         super(IPOption, self).__init__(name, doc, default=default,
@@ -712,7 +717,7 @@ class IPOption(Option):
                                        requires=requires,
                                        multi=multi,
                                        validator=validator,
-                                       validator_args=validator_args,
+                                       validator_params=validator_params,
                                        properties=properties)
 
     def _validate(self, value):
@@ -738,7 +743,7 @@ class PortOption(Option):
 
     def __init__(self, name, doc, default=None, default_multi=None,
                  requires=None, multi=False, callback=None,
-                 callback_params=None, validator=None, validator_args=None,
+                 callback_params=None, validator=None, validator_params=None,
                  properties=None, allow_range=False, allow_zero=False,
                  allow_wellknown=True, allow_registred=True,
                  allow_private=False):
@@ -772,7 +777,7 @@ class PortOption(Option):
                                          requires=requires,
                                          multi=multi,
                                          validator=validator,
-                                         validator_args=validator_args,
+                                         validator_params=validator_params,
                                          properties=properties)
 
     def _validate(self, value):
@@ -857,7 +862,7 @@ class DomainnameOption(Option):
 
     def __init__(self, name, doc, default=None, default_multi=None,
                  requires=None, multi=False, callback=None,
-                 callback_params=None, validator=None, validator_args=None,
+                 callback_params=None, validator=None, validator_params=None,
                  properties=None, allow_ip=False, type_='domainname'):
         #netbios: for MS domain
         #hostname: to identify the device
@@ -876,7 +881,7 @@ class DomainnameOption(Option):
                                                requires=requires,
                                                multi=multi,
                                                validator=validator,
-                                               validator_args=validator_args,
+                                               validator_params=validator_params,
                                                properties=properties)
 
     def _validate(self, value):
@@ -1252,3 +1257,33 @@ def validate_requires_arg(requires, name):
                                require[3], require[4], require[5]))
         ret.append(tuple(ret_action))
     return frozenset(config_action.keys()), tuple(ret)
+
+
+def validate_callback(callback, callback_params, type_):
+    if type(callback) != FunctionType:
+        raise ValueError(_('{0} should be a function').format(type_))
+    if callback_params is not None:
+        if not isinstance(callback_params, dict):
+            raise ValueError(_('{0}_params should be a dict').format(type_))
+        for key, callbacks in callback_params.items():
+            if key != '' and len(callbacks) != 1:
+                raise ValueError(_('{0}_params with key {1} should not have '
+                                   'length different to 1').format(type_,
+                                                                   key))
+            if not isinstance(callbacks, tuple):
+                raise ValueError(_('{0}_params should be tuple for key "{1}"'
+                                   ).format(type_, key))
+            for callbk in callbacks:
+                if isinstance(callbk, tuple):
+                    option, force_permissive = callbk
+                    if type_ == 'validator' and not force_permissive:
+                        raise ValueError(_('validator not support tuple'))
+                    if not isinstance(option, Option) and not \
+                            isinstance(option, SymLinkOption):
+                        raise ValueError(_('{0}_params should have an option '
+                                           'not a {0} for first argument'
+                                           ).format(type_, type(option)))
+                    if force_permissive not in [True, False]:
+                        raise ValueError(_('{0}_params should have a boolean'
+                                           'not a {0} for second argument'
+                                           ).format(type_, type(force_permissive)))

tiramisu/value.py

@@ -124,7 +124,7 @@ class Values(object):
             return True
         return False
 
-    def _getcallback_value(self, opt, index=None):
+    def _getcallback_value(self, opt, index=None, max_len=None):
         """
         retrieves a value for the options that have a callback
 
@@ -139,7 +139,7 @@ class Values(object):
         return carry_out_calculation(opt._name, config=self.context(),
                                      callback=callback,
                                      callback_params=callback_params,
-                                     index=index)
+                                     index=index, max_len=max_len)
 
     def __getitem__(self, opt):
         "enables us to use the pythonic dictionary-like access to values"
@@ -190,6 +190,7 @@ class Values(object):
         if opt.impl_has_callback() and (
                 self._is_default_owner(path) or
                 (is_frozen and 'force_default_on_freeze' in setting[opt])):
+            lenmaster = None
             no_value_slave = False
             if (opt.impl_is_multi() and
                     opt.impl_get_multitype() == multitypes.slave):
@@ -202,7 +203,7 @@ class Values(object):
 
             if not no_value_slave:
                 try:
-                    value = self._getcallback_value(opt)
+                    value = self._getcallback_value(opt, max_len=lenmaster)
                 except ConfigError as config_error:
                     value = None
                     # should not raise PropertiesOptionError if option is
@@ -389,20 +390,27 @@ class Multi(list):
 
     def _valid_slave(self, value):
         #if slave, had values until master's one
+        values = self.context().cfgimpl_get_values()
         masterp = self.context().cfgimpl_get_description().impl_get_path_by_opt(
             self.opt.impl_get_master_slaves())
         mastervalue = getattr(self.context(), masterp)
         masterlen = len(mastervalue)
         valuelen = len(value)
         if valuelen > masterlen or (valuelen < masterlen and
-                                    not self.context().cfgimpl_get_values(
+                                    not values._is_default_owner(self.path)):
-                                    )._is_default_owner(self.path)):
             raise SlaveError(_("invalid len for the slave: {0}"
                                " which has {1} as master").format(
                                    self.opt._name, masterp))
         elif valuelen < masterlen:
             for num in range(0, masterlen - valuelen):
-                value.append(self.opt.impl_getdefault_multi())
+                if self.opt.impl_has_callback():
+                    # if callback add a value, but this value will not change
+                    # anymore automaticly (because this value has owner)
+                    index = value.__len__()
+                    value.append(values._getcallback_value(self.opt,
+                                                           index=index))
+                else:
+                    value.append(self.opt.impl_getdefault_multi())
         #else: same len so do nothing
         return value
 
@@ -420,8 +428,17 @@ class Multi(list):
                                            self.opt._name, slave._name))
                 elif len(value_slave) < masterlen:
                     for num in range(0, masterlen - len(value_slave)):
-                        value_slave.append(slave.impl_getdefault_multi(),
+                        if slave.impl_has_callback():
-                                           force=True)
+                            # if callback add a value, but this value will not
+                            # change anymore automaticly (because this value
+                            # has owner)
+                            index = value_slave.__len__()
+                            value_slave.append(
+                                values._getcallback_value(slave, index=index),
+                                force=True)
+                        else:
+                            value_slave.append(slave.impl_getdefault_multi(),
+                                               force=True)
 
     def __setitem__(self, key, value):
         self._validate(value)