##############################################################################
#
# Copyright (c) 2009 Nexedi SA and Contributors. All Rights Reserved.
#                    Jean-Paul Smets-Solanes <jp@nexedi.com>
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from Products.ERP5.Interface.IBusinessCompletable import IBusinessCompletable
from Products.ERP5.Interface.IBusinessBuildable import IBusinessBuildable

class IBusinessPath(IBusinessCompletable, IBusinessBuildable):
  """Business Path interface specification
  """
  def getExpectedStartDate(task, predecessor_date=None):
    """Returns the expected start date for this
    path based on the task and provided predecessor_date.

    'task' is a document which follows the ITaskGetter interface
    (getStartDate, getStopDate) and defined the reference dates
    for the business process execution

    'predecessor_date' can be provided as predecessor date and
     to override the date provided in the task
    """

  def getExpectedStopDate(task, predecessor_date=None):
    """Returns the expected stop date for this
    path based on the task and provided predecessor_date.

    'task' is a document which follows the ITaskGetter interface
    (getStartDate, getStopDate) and defined the reference dates
    for the business process execution

    'predecessor_date' can be provided as predecessor date and
     to override the date provided in the task
    """