StringDivergenceTester.py 4.67 KB
# -*- coding: utf-8 -*-
##############################################################################
#
# Copyright (c) 2008-2009 Nexedi SA and Contributors. All Rights Reserved.
#                    Rafael Monnerat <rafael@nexedi.com>
#                    Jean-Paul Smets <jp@nexedi.com>
#
# WARNING: This program as such is intended to be used by professional
# programmers who take the whole responsibility of assessing all potential
# consequences resulting from its eventual inadequacies and bugs
# End users who are looking for a ready-to-use solution with commercial
# guarantees and support are strongly adviced to contract a Free Software
# Service Company
#
# This program is Free Software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
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##############################################################################

import zope.interface
from AccessControl import ClassSecurityInfo

from Products.ERP5.Document.Predicate import Predicate
from Products.ERP5Type import Permissions, PropertySheet, interfaces
from Products.ERP5.mixin.divergence_tester import DivergenceTesterMixin

class StringDivergenceTester(Predicate, DivergenceTesterMixin):
  """
  The purpose of this divergence tester is to check the
  consistency between delivery movement and simulation movement
  for a specific property.
  """
  meta_type = 'ERP5 String Divergence Tester'
  portal_type = 'String Divergence Tester'
  add_permission = Permissions.AddPortalContent

  # Declarative security
  security = ClassSecurityInfo()
  security.declareObjectProtected(Permissions.AccessContentsInformation)

  # Declarative properties
  property_sheets = (   PropertySheet.Base
                      , PropertySheet.XMLObject
                      , PropertySheet.CategoryCore
                      , PropertySheet.DublinCore
                      , PropertySheet.DivergenceTester
                      , PropertySheet.SolverSelection
                     )

  # Declarative interfaces
  zope.interface.implements( interfaces.IDivergenceTester, )


  def _compare(self, prevision_movement, decision_movement):
    """
    If prevision_movement and decision_movement don't match, it returns a
    list : (prevision_value, decision_value, message, mapping)
    """
    tested_property = self.getTestedProperty()
    if getattr(decision_movement, 'isPropertyRecorded',
               lambda x:False)(tested_property):
      decision_value = decision_movement.getRecordedProperty(tested_property)
    else:
      decision_value = decision_movement.getProperty(tested_property)
    prevision_value = prevision_movement.getProperty(tested_property)

    # XXX do we have configurable parameter for this divergence tester ?
    # like ambiguity...
    if decision_value != prevision_value:
      return (
        prevision_value, decision_value,
        'The value of ${prperty_name} is different between decision and prevision.',
        dict(property_name=tested_property))
    return None

  def getUpdatablePropertyDict(self, prevision_movement, decision_movement):
    """
    Returns a list of properties to update on decision_movement
    prevision_movement so that next call to compare returns True.

    prevision_movement -- a simulation movement (prevision)

    decision_movement -- a delivery movement (decision)
    """
    tested_property = self.getTestedProperty()
    prevision_value = prevision_movement.getProperty(tested_property)
    return {tested_property:prevision_value}

  def accept(self, simulation_movement):
    """
    Copies the properties handled by the divergence tester
    from the related delivery movement to simulation_movement.

    NOTE: the future existence of this method is still unknown
    because it is likely to be implemented in TargetSolver
    instead.
    """
    raise NotImplementedError

  def adopt(self, simulation_movement):
    """
    Copies the properties handled by the divergence tester
    from simulation_movement to the related delivery movement

    NOTE: the future existence of this method is still unknown
    because it is likely to be implemented in TargetSolver
    instead.
    """
    raise NotImplementedError