UniKL Logo

Lehrgebiet Informationssysteme

FB Informatik

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

Test Case taDOM3+/9-taDOM3+-23-CO

taDOM3+ Lock Requests of executed Operation getLastChild(contextElementNode) returns null value

The getLastChild operation returns null because the context node CO does not have any child nodes.

Behavior specified with base operations:

  • readCO
  • useCOLCE
  • useCOFCE
Read Set = CO COFCE COLCE , Write Set =
  • LockRequest[node=CO,lock:NR,PSE:-,NSE:-,FCE:ER,LCE:ER]

taDOM3+ Lock Requests of checked Operation appendChild(contextElementNode, childType, childValue) executed on node CO

The appendChild operation is executed on the context element node CO and appends a new child to the (at least one) already existing child nodes. The CX resp. NRCX lock on the context node is caused by the SX lock on the new child. The new appended child node (the new last child) is returned.

Bahavior specified with base operations:

  • readCO
  • modifyCOLCE
  • modifyLCNSE

Read and write sets for execution on CO:

Read Set = CO , Write Set = COLCE LCNSE
  • LockRequest[node=CO,lock:NRCX,PSE:-,NSE:-,FCE:-,LCE:EX] on CO
  • LockRequest[node=LC,lock:-,PSE:-,NSE:EX,FCE:-,LCE:-] on CO

Operations must be incompatible

CheckExisting LockRequest[node=CO,lock:NR,PSE:-,NSE:-,FCE:ER,LCE:ER]
with
Requested LockRequest[node=CO,lock:NRCX,PSE:-,NSE:-,FCE:-,LCE:EX] on CO
On CO the last child edge lock ER is incompatible to the requested EX
Incompatible
CheckExisting LockRequest[node=CO,lock:NR,PSE:-,NSE:-,FCE:ER,LCE:ER]
with
Requested LockRequest[node=LC,lock:-,PSE:-,NSE:EX,FCE:-,LCE:-] on CO
Compatible
Test Case Ok