NumberingPolicy.py

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#!/usr/bin/env python
# -*- coding: euc-jp -*-



import string
import OpenRTM_aist


class NumberingPolicy:
  """
  """



  
  class ObjectNotFound:
    pass


  
  def onCreate(self, obj):
    pass


  
  def onDelete(self, obj):
    pass




class DefaultNumberingPolicy(NumberingPolicy):
  """
  """

  
  def __init__(self):
    self._num = 0
    self._objects = []


  
  def onCreate(self, obj):
    self._num += 1

    pos = 0
    try:
      pos = self.find(None)
      self._objects[pos] = obj
      return OpenRTM_aist.otos(pos)
    except NumberingPolicy.ObjectNotFound:
      self._objects.append(obj)
      return OpenRTM_aist.otos(int(len(self._objects) - 1))


  
  def onDelete(self, obj):
    pos = 0
    try:
      pos = self.find(obj)
    except:
      return

    if (pos < len(self._objects)):
      self._objects[pos] = None
    self._num -= 1


  
  def find(self, obj):
    i = 0
    for obj_ in self._objects:
      if obj_ == obj:
        return i
      i += 1
    raise NumberingPolicy.ObjectNotFound()