UniKL Logo

Lehrgebiet Informationssysteme

FB Informatik
FB Informatik
 
LG IS
AG DBIS
AG HIS
Jobs / Tasks
Courses
Publications
Contact
Misc
Impressum
(C) AG DBIS
  

Use Case 7:

Node Operation getFirstChild(contextElementNode)
returns null value

The getFirstChild operation returns null because the context node CO does not have any child nodes.
  • This operation can be executed on an element context node
  • This operation cannot be executed on an text context node

Scenario 7-1 for taDOM2 Lock Requests:
NodeLockPSENSEFCELCE
CONR--ERER
CNNR----
Scenario 7-2 for taDOM2+ Lock Requests:
NodeLockPSENSEFCELCE
CONR--ERER
CNNR----
Scenario 7-3 for taDOM3 Lock Requests:
NodeLockPSENSEFCELCE
CONR--ERER
Scenario 7-4 for taDOM3+ Lock Requests:
NodeLockPSENSEFCELCE
CONR--ERER

Operation behavior described with base operations:

  • readCO
  • useCOFCE
  • useCOLCE
Read Set = CO COFCE COLCE , Write Set =

This operation can be executed on the following nodes:

  • AC
  • PA
  • PS
  • CO
  • NS
  • FC
  • CH
  • LC
  • DC
  • CA
  • AX

If this operation is executed the following nodes are existing:

  • AC
  • PA
  • PS
  • CO
  • NS
  • CA
  • AX