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Adaptive Object-Oriented Software Development                   Fall 1998
COM 3360/NTU SE737                                              Karl Lieberherr
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Midterm

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Open book and open notes.

Question 1:                               60 points
Question 2: 18 UNKNOWNs: 2 points each    36 points
Question 3: 6 UNKNOWNs, 2 points each:    12 points 

TOTAL:                                  108

Question 1: 
==================================================

1a:

Mapping = List(Entry).
Entry = Edge "by" Strat.
Edge = EdgeAux. // to ship around a bug in Demeter/Java
EdgeAux : ConstructionEdge | AlternationEdge | RepetitionEdge.
ConstructionEdge = "->" 
  Source "," <label> LabelName "," Target.
AlternationEdge = "=>" Source "," Target.
RepetitionEdge = "~>" Source "," Target.
Strat = "{" List(SEdge) "}".
SEdge = "->" Source Target [Bypass].
Bypass = "bypassing" ClassName.
Source = <source> ClassName.
Target = <target> ClassName.
List(S) ~ {S}.

ClassName = Ident.
LabelName = Ident.

Main = .

*visitor* CNPV = .


1b:

Program:

Main {
  public static void main(String args[]) throws Exception (@
    Mapping p = Mapping.parse(System.in);
    System.out.println(" done  ");
    p.print_sources();
    System.out.println(" done  ");
    p.print_sources2();
    System.out.println(" done2  ");
    p.print_sources4();
    System.out.println(" done4  ");
    p.print_sources5();
    System.out.println(" done5  ");
    p.print_sources6();
    System.out.println(" done6  ");
    p.print_sources7();
    System.out.println(" done7  ");
    p.print_strat_sources();
    System.out.println(" done8  ");
    p.universal_trv0(new DisplayVisitor());
  @)
}


Mapping {
  void print_sources() via Edge via Source to ClassName {
    before ClassName 
      (@ 
	System.out.println(" source className " + host.get_ident());
      @)
  }
  void print_sources2() via Edge via Source to ClassName (CNPV);
  void print_sources4() {Mapping -> Edge Edge -> Source Source -> ClassName} (CNPV);
  traversal edgeSources(CNPV) {
    via Edge via Source to ClassName;
    // {Mapping -> Edge Edge -> Source Source -> ClassName}
  }
  void print_sources5() = edgeSources (CNPV); 
  void print_sources6() (@
    CNPV iCNPV = new CNPV();
    edgeSources (iCNPV); 
  @)     
  void print_strat_sources() via Strat via Source to ClassName (CNPV);
}

CNPV 
  {
    before ClassName 
      (@ 
	System.out.println(" source className " + host.get_ident());
      @)
  }

1c:

Edge : ConstructionEdge | AlternationEdge | RepetitionEdge *common*
  Source Target.

ConstructionEdge = "->" <label> LabelName.
// The language is now changed: label is at end
AlternationEdge = "=>".
RepetitionEdge = "~>".

Class structure is simpler but language has changed.

1d:


Question 2:
==================================================

UNKNOWN1 = curW *CHOICE*


UNKNOWN2 = total


UNKNOWN3 = total


UNKNOWN4 = total


UNKNOWN5 = host


UNKNOWN6 = host


UNKNOWN7 = curW = UNKNOWN1


UNKNOWN8 = total


UNKNOWN9 = total


UNKNOWN10 = host


UNKNOWN11 = curW = UNKNOWN1


UNKNOWN12 = host


UNKNOWN13 = host


UNKNOWN14 = Container


UNKNOWN15 = Container


UNKNOWN16 = checkCapacity


UNKNOWN17 = <contents> Item_List


UNKNOWN18 = ~ {Item}.


Question 3: 
==================================================

UNKNOWN1 = B C D


UNKNOWN2 = T


UNKNOWN3 = Z


UNKNOWN4 = Z


UNKNOWN5 = D = T


UNKNOWN6 = 
at Z
at Z
at Z
done