201 lines
9.3 KiB
Python
201 lines
9.3 KiB
Python
# -*- coding: utf-8 -*-
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"master slave support"
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# Copyright (C) 2014 Team tiramisu (see AUTHORS for all contributors)
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#
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# This program is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by the
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# Free Software Foundation, either version 3 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# The original `Config` design model is unproudly borrowed from
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# the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
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# the whole pypy projet is under MIT licence
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# ____________________________________________________________
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from tiramisu.i18n import _
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from tiramisu.setting import log
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from tiramisu.error import SlaveError, ConfigError
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from .baseoption import SymLinkOption, Option
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class MasterSlaves(object):
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__slots__ = ('master', 'slaves')
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def __init__(self, name, childs):
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#if master (same name has group) is set
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#for collect all slaves
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self.master = None
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slaves = []
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for child in childs:
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if isinstance(child, SymLinkOption):
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raise ValueError(_("master group {0} shall not have "
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"a symlinkoption").format(name))
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if not isinstance(child, Option):
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raise ValueError(_("master group {0} shall not have "
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"a subgroup").format(name))
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if not child.impl_is_multi():
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raise ValueError(_("not allowed option {0} "
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"in group {1}"
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": this option is not a multi"
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"").format(child._name, name))
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if child._name == name:
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self.master = child
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else:
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slaves.append(child)
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if self.master is None:
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raise ValueError(_('master group with wrong'
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' master name for {0}'
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).format(name))
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callback, callback_params = self.master.impl_get_callback()
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if callback is not None and callback_params is not None:
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for key, callbacks in callback_params.items():
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for callbk in callbacks:
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if isinstance(callbk, tuple):
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if callbk[0] in slaves:
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raise ValueError(_("callback of master's option shall "
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"not refered a slave's ones"))
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#everything is ok, store references
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self.slaves = tuple(slaves)
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for child in childs:
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child._master_slaves = self
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def is_master(self, opt):
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return opt == self.master
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def in_same_group(self, opt):
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return opt == self.master or opt in self.slaves
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def reset(self, values):
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for slave in self.slaves:
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values.reset(slave)
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def pop(self, values, index):
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#FIXME pas test de meta ...
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for slave in self.slaves:
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if not values.is_default_owner(slave, validate_properties=False,
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validate_meta=False):
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values._get_cached_item(slave, validate=False,
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validate_properties=False
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).pop(index, force=True)
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pass
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def getitem(self, values, opt, path, validate, force_permissive,
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force_properties, validate_properties):
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if opt == self.master:
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return self._getmaster(values, opt, path, validate,
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force_permissive, force_properties,
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validate_properties)
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else:
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return self._getslave(values, opt, path, validate,
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force_permissive, force_properties,
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validate_properties)
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def _getmaster(self, values, opt, path, validate, force_permissive,
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force_properties, validate_properties):
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value = values._get_validated_value(opt, path, validate,
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force_permissive,
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force_properties,
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validate_properties)
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if validate is True:
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masterlen = len(value)
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for slave in self.slaves:
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try:
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slave_path = values._get_opt_path(slave)
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slave_value = values._get_validated_value(slave,
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slave_path,
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False,
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False,
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None, False,
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None) # not undefined
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slavelen = len(slave_value)
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self.validate_slave_length(masterlen, slavelen, slave._name)
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except ConfigError:
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pass
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return value
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def _getslave(self, values, opt, path, validate, force_permissive,
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force_properties, validate_properties):
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value = values._get_validated_value(opt, path, validate,
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force_permissive,
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force_properties,
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validate_properties,
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None) # not undefined
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return self.get_slave_value(values, opt, value, validate, validate_properties)
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def setitem(self, values, opt, value, path):
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if opt == self.master:
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masterlen = len(value)
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for slave in self.slaves:
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slave_path = values._get_opt_path(slave)
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slave_value = values._get_validated_value(slave,
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slave_path,
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False,
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False,
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None, False,
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None) # not undefined
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slavelen = len(slave_value)
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self.validate_slave_length(masterlen, slavelen, slave._name)
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else:
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self.validate_slave_length(self.get_length(values), len(value),
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opt._name, setitem=True)
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def get_length(self, values, validate=True):
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masterp = values._get_opt_path(self.master)
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return len(self.getitem(values, self.master, masterp, validate, False,
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None, True))
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def validate_slave_length(self, masterlen, valuelen, name, setitem=False):
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if valuelen > masterlen or (valuelen < masterlen and setitem):
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log.debug('validate_slave_length: masterlen: {0}, valuelen: {1}, '
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'setitem: {2}'.format(masterlen, valuelen, setitem))
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raise SlaveError(_("invalid len for the slave: {0}"
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" which has {1} as master").format(
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name, self.master._name))
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def get_slave_value(self, values, opt, value, validate=True,
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validate_properties=True):
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"""
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if master has length 0:
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return []
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if master has length bigger than 0:
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if default owner:
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if has callback:
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if return a list:
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list same length as master: return list
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list is smaller than master: return list + None
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list is greater than master: raise SlaveError
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if has default value:
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list same length as master: return list
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list is smaller than master: return list + None
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list is greater than master: raise SlaveError
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if has default_multi value:
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return default_multi * master's length
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if has value:
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list same length as master: return list
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list is smaller than master: return list + None
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list is greater than master: raise SlaveError
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"""
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#if slave, had values until master's one
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masterlen = self.get_length(values, validate)
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valuelen = len(value)
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if validate:
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self.validate_slave_length(masterlen, valuelen, opt._name)
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path = values._get_opt_path(opt)
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if valuelen < masterlen:
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for num in range(0, masterlen - valuelen):
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index = valuelen + num
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value.append(values._get_validated_value(opt, path, True,
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False, None,
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validate_properties,
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index=index),
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setitem=False,
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force=True)
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return value
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