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4.1.10.6.10 FindBestParentObject

procedure FindBestParentObject(
  parentObject: DSName,
  replEntinfList: REPLENTINFLIST,
  sourcePrefixTable: PrefixTable,
  nc: DSName,
  var attributesAndStamps: set of AttributeAndStamp): DSName

Informative summary of behavior: Given a desired parent object, the FindBestParentObject procedure validates whether the desired parent object is deleted. If the object that is being updated is not a deleted object and the desired parent object is deleted, this procedure returns the DSName of the Lost and Found container. Following are the input parameters for this procedure:

  • parentObject: The DSName of the desired parent object.

  • replEntinfList: The replicated update that should be applied.

  • sourcePrefixTable: The prefix table from the server.

  • nc: The DSName of the root of the NC replica.

  • attributesAndStamps: The AttributeAndStamp set that corresponds to the replicated update (can be modified by this procedure).

isDeletedAttr: ATTRVAL
isDeletedValue: boolean
attrAndStamp: AttributeAndStamp
isDeletedAttr := ENTINF_GetValue(
                   replEntinfList.Entinf, 
                   isDeleted, 
                   sourcePrefixTable)
if (isDeletedAttr = null) then
  isDeletedValue := false
else
  isDeletedValue := ValueFromATTRVal(
      isDeletedAttr, Syntax(isDeleted), sourcePrefixTable)
endif
  
if isDeletedValue = false and parentObject!isDeleted = true then
  /* This indicates that an object was moved/created under
   * parentObject in one NC replica while parentObject was deleted
   * in another NC replica. In this case move/add an object under
   * the "lost and found" container.
   */
  
  /* Remove attribute stamp for name so that the update is seen
   * as an originating update. */
  attrAndStamp := select one from attributesAndStamps where
      (e.attribute = name)
  attributesAndStamps := attributesAndStamps - {attrAndStamp}
  return GetWellKnownObject(nc, GUID_LOSTANDFOUND_CONTAINER_W)
endif
return parentObject
 
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