Hi Doug:

I had pretty good success to use Demeter/Java and DJ.
What I like is that I can put the generic code into a separate .beh
file and I don't have to do the cross cutting manually.

What I don't understand is why the DJ traversal only prints

begin

and then it runs into a run-time exception.

Please can you check.

-- Karl

/proj/adaptive/www/course/f00/hw/1/scratch-graph

Demeter/Java version 0.8.1-alpha-4
Copyright (c) 2000 Northeastern University
Reading project file program.prj...
Running the test...
CountingVisitor is leaving class Adj total = 3
CountingVisitor is leaving class Adj total = 6
CountingVisitor is leaving class Adj total = 9
CountingVisitor is leaving class Adj total = 11
CountingVisitor is leaving class Adj total = 14
CountingVisitor is leaving class Adj total = 17
CountingVisitor is leaving class Adj total = 19
CountingVisitor is leaving class Adj total = 22
CountingVisitor is leaving class Adj total = 25
CountingVisitor is leaving class Adj total = 28
CountingVisitor is leaving class Adj total = 31
CountingVisitor is leaving class Adj total = 32
CountingVisitor is leaving class Adj total = 33
CountingVisitor is leaving class Adj total = 35
CountingVisitor is leaving class Adj total = 37
CountingVisitor is leaving class Adj total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Adj total = 3
CountingVisitor is leaving class Adj total = 6
CountingVisitor is leaving class Adj total = 9
CountingVisitor is leaving class Adj total = 11
CountingVisitor is leaving class Adj total = 14
CountingVisitor is leaving class Adj total = 17
CountingVisitor is leaving class Adj total = 19
CountingVisitor is leaving class Adj total = 22
CountingVisitor is leaving class Adj total = 25
CountingVisitor is leaving class Adj total = 28
CountingVisitor is leaving class Adj total = 31
CountingVisitor is leaving class Adj total = 32
CountingVisitor is leaving class Adj total = 33
CountingVisitor is leaving class Adj total = 35
CountingVisitor is leaving class Adj total = 37
CountingVisitor is leaving class Adj total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
CountingVisitor is leaving class Cd_graph total = 38
result = 38 , 38
The DJ version is: DJ version 0.8.1-alpha-3
The class graph is=============================
java.lang.Object : java.lang.Class | java.lang.String | Adj_list | Adj | Token | java.lang.Throwable | Vertex | Neighbors | UniversalVisitor | Any_vertex | EDU.neu.ccs.demeter.Ident | Any_vertex_list | ParserTokenManager | ASCII_UCodeESC_CharStream | java.util.AbstractCollection | Main | EDU.neu.ccs.demeter.dj.Visitor | java.lang.Number | java.lang.Boolean | java.lang.Character | java.lang.StringBuffer | EDU.neu.ccs.demeter.Text | EDU.neu.ccs.demeter.Line | EDU.neu.ccs.demeter.Word | Parser | java.io.Reader | java.io.Writer | java.lang.reflect.AccessibleObject | EDU.neu.ccs.demeter.AroundContinuation common <hashCode> derived int <getClass> derived java.lang.Class <toString> derived java.lang.String.
int = .
java.lang.Class = extends java.lang.Object implements java.io.Serializable.
java.io.Serializable : java.lang.Class | java.lang.String | java.lang.Throwable | EDU.neu.ccs.demeter.Ident | java.util.Vector | java.lang.Number | java.lang.Boolean | java.lang.Character | java.lang.StringBuffer | EDU.neu.ccs.demeter.Text | EDU.neu.ccs.demeter.Line | EDU.neu.ccs.demeter.Word common .
java.lang.String = extends java.lang.Object implements java.io.Serializable, java.lang.Comparable.
java.lang.Comparable : java.lang.String | java.lang.Character | java.lang.Integer | java.lang.Long | java.lang.Float | java.lang.Double common .
Adj_list : Cd_graph | Empty_cd_graph common extends java.lang.Object.
Cd_graph = <first> Adj <rest> Adj_list <countInhRels> derived int <countInhRels2> derived int <get_first> derived Adj <get_rest> derived Adj_list extends Adj_list.
Adj = <vertex> Vertex <ns> Neighbors <get_vertex> derived Vertex <get_ns> derived Neighbors extends java.lang.Object.
ParseException = <specialConstructor> boolean <currentToken> Token <expectedTokenSequences> int <tokenImage> java.lang.String <eol> java.lang.String <getMessage> derived java.lang.String extends java.lang.Exception.
boolean = .
Token = <kind> int <beginLine> int <beginColumn> int <endLine> int <endColumn> int <image> java.lang.String <next> Token <specialToken> Token <toString> derived java.lang.String extends java.lang.Object.
java.lang.Exception : ParseException common extends java.lang.Throwable.
java.lang.Throwable : java.lang.Exception | java.lang.Error common <backtrace> java.lang.Object <detailMessage> java.lang.String <fillInStackTrace> derived java.lang.Throwable <toString> derived java.lang.String <getMessage> derived java.lang.String <getLocalizedMessage> derived java.lang.String extends java.lang.Object implements java.io.Serializable.
Vertex = <name> EDU.neu.ccs.demeter.Ident <get_name> derived EDU.neu.ccs.demeter.Ident extends java.lang.Object.
Neighbors : Alternat | Construct common extends java.lang.Object.
UniversalVisitor : CountingVisitor | PrintVisitor | TraceVisitor | DisplayVisitor | EqualVisitor | SubgraphVisitor | CopyVisitor common extends java.lang.Object.
CountingVisitor = <total> int <get_return_val> derived int <get_total> derived int extends UniversalVisitor.
Empty_cd_graph = extends Adj_list.
Any_vertex : Labeled_vertex | Syntax_vertex common extends java.lang.Object.
Labeled_vertex = <label_name> EDU.neu.ccs.demeter.Ident <class_name> Vertex <get_label_name> derived EDU.neu.ccs.demeter.Ident <get_class_name> derived Vertex extends Any_vertex.
EDU.neu.ccs.demeter.Ident = extends java.lang.Object implements java.io.Serializable.
Syntax_vertex = <string> java.lang.String <get_string> derived java.lang.String extends Any_vertex.
Any_vertex_list : Empty | Nany_vertex_list common extends java.lang.Object.
Empty = extends Any_vertex_list.
Nany_vertex_list = <first> Any_vertex <rest> Any_vertex_list <get_first> derived Any_vertex <get_rest> derived Any_vertex_list extends Any_vertex_list.
Alternat = <first> Vertex <second> Vertex <get_first> derived Vertex <get_second> derived Vertex extends Neighbors.
Construct = <c_ns> Any_vertex_list <get_c_ns> derived Any_vertex_list extends Neighbors.
Parser = <token_source> ParserTokenManager <jj_input_stream> ASCII_UCodeESC_CharStream <token> Token <jj_nt> Token <jj_ntk> int <jj_gen> int <jj_expentries> java.util.Vector <jj_expentry> int <jj_kind> int <_Main> derived Main <_Cd_graph> derived Cd_graph <_CountingVisitorDJ> derived CountingVisitorDJ <jj_ntk> derived int <_Adj> derived Adj <_Adj_list> derived Adj_list <_Vertex> derived Vertex <_Neighbors> derived Neighbors <_Construct> derived Construct <_Alternat> derived Alternat <_Any_vertex_list> derived Any_vertex_list <_Any_vertex> derived Any_vertex <_Labeled_vertex> derived Labeled_vertex <_Syntax_vertex> derived Syntax_vertex <_String> derived java.lang.String <_Ident> derived EDU.neu.ccs.demeter.Ident <_Empty_cd_graph> derived Empty_cd_graph <_Nany_vertex_list> derived Nany_vertex_list <_Empty> derived Empty <_CountingVisitor> derived CountingVisitor <_int> derived int <_boolean> derived boolean <_char> derived char <_byte> derived byte <_short> derived short <_Number> derived java.lang.Number <_long> derived long <_float> derived float <_double> derived double <_Boolean> derived java.lang.Boolean <_Character> derived java.lang.Character <_Integer> derived java.lang.Integer <_Long> derived java.lang.Long <_Float> derived java.lang.Float <_Double> derived java.lang.Double <_StringBuffer> derived java.lang.StringBuffer <_Text> derived EDU.neu.ccs.demeter.Text <_Line> derived EDU.neu.ccs.demeter.Line <_Word> derived EDU.neu.ccs.demeter.Word <getNextToken> derived Token <generateParseException> derived ParseException extends java.lang.Object implements ParserConstants.
ParserTokenManager = <input_stream> ASCII_UCodeESC_CharStream <image> java.lang.StringBuffer <jjimageLen> int <lengthOfMatch> int <curChar> char <curLexState> int <defaultLexState> int <jjnewStateCnt> int <jjround> int <jjmatchedPos> int <jjmatchedKind> int <getNextToken> derived Token <jjMoveStringLiteralDfa0_0> derived int <jjMoveStringLiteralDfa0_2> derived int <jjMoveStringLiteralDfa0_1> derived int <jjFillToken> derived Token extends java.lang.Object implements ParserConstants.
ParserConstants : ParserTokenManager | Parser common .
ASCII_UCodeESC_CharStream = <bufpos> int <bufsize> int <available> int <tokenBegin> int <bufline> int <bufcolumn> int <column> int <line> int <inputStream> java.io.Reader <prevCharIsCR> boolean <prevCharIsLF> boolean <nextCharBuf> char <buffer> char <maxNextCharInd> int <nextCharInd> int <inBuf> int <readChar> derived char <ReadByte> derived char <BeginToken> derived char <getColumn> derived int <getLine> derived int <getEndColumn> derived int <getEndLine> derived int <getBeginColumn> derived int <getBeginLine> derived int <GetImage> derived java.lang.String extends java.lang.Object.
java.util.Vector : java.util.Stack common extends java.util.AbstractList implements java.util.List, java.lang.Cloneable, java.io.Serializable.
java.util.AbstractList : java.util.Vector common extends java.util.AbstractCollection implements java.util.List.
java.util.AbstractCollection : java.util.AbstractList common extends java.lang.Object implements java.util.Collection.
java.util.Collection : java.util.AbstractCollection | java.util.List common <elements> java.lang.Object.
java.util.List : java.util.AbstractList | java.util.Vector common extends java.util.Collection.
java.lang.Cloneable : java.util.Vector common .
Main = extends java.lang.Object.
CountingVisitorDJ = <c> int <getReturnValue> derived java.lang.Object extends EDU.neu.ccs.demeter.dj.Visitor.
EDU.neu.ccs.demeter.dj.Visitor : CountingVisitorDJ common extends java.lang.Object.
char = .
byte = .
short = .
java.lang.Number : java.lang.Integer | java.lang.Long | java.lang.Float | java.lang.Double common extends java.lang.Object implements java.io.Serializable.
long = .
float = .
double = .
java.lang.Boolean = extends java.lang.Object implements java.io.Serializable.
java.lang.Character = extends java.lang.Object implements java.io.Serializable, java.lang.Comparable.
java.lang.Integer = extends java.lang.Number implements java.lang.Comparable.
java.lang.Long = extends java.lang.Number implements java.lang.Comparable.
java.lang.Float = extends java.lang.Number implements java.lang.Comparable.
java.lang.Double = extends java.lang.Number implements java.lang.Comparable.
java.lang.StringBuffer = extends java.lang.Object implements java.io.Serializable.
EDU.neu.ccs.demeter.Text = extends java.lang.Object implements java.io.Serializable.
EDU.neu.ccs.demeter.Line = extends java.lang.Object implements java.io.Serializable.
EDU.neu.ccs.demeter.Word = extends java.lang.Object implements java.io.Serializable.
java.io.Reader = extends java.lang.Object.
TokenMgrError = <errorCode> int <getMessage> derived java.lang.String extends java.lang.Error.
java.lang.Error : TokenMgrError common extends java.lang.Throwable.
PrintVisitor = <indent> int <needSpace> boolean <out> java.io.PrintWriter <get_indent> derived int <get_needSpace> derived boolean <get_out> derived java.io.PrintWriter extends UniversalVisitor.
java.io.PrintWriter = extends java.io.Writer.
java.io.Writer : java.io.PrintWriter common extends java.lang.Object.
TraceVisitor = <indent> int <out> java.io.PrintWriter <get_indent> derived int <get_out> derived java.io.PrintWriter extends UniversalVisitor.
DisplayVisitor = <indent> int <out> java.io.PrintWriter <get_indent> derived int <get_out> derived java.io.PrintWriter extends UniversalVisitor.
EqualVisitor = <is_equal> boolean <history> java.util.Stack <get_return_val> derived boolean <get_is_equal> derived boolean extends UniversalVisitor.
java.util.Stack = extends java.util.Vector.
SubgraphVisitor = <is_equal> boolean <history> java.util.Stack <get_return_val> derived boolean <get_is_equal> derived boolean extends UniversalVisitor.
CopyVisitor = <history> java.util.Stack <get_return_val> derived java.lang.Object <get_copy> derived java.lang.Object extends UniversalVisitor.
__Subtraversal = <method> java.lang.reflect.Method <object> java.lang.Object <args> java.lang.Object extends EDU.neu.ccs.demeter.AroundContinuation.
java.lang.reflect.Method = extends java.lang.reflect.AccessibleObject implements java.lang.reflect.Member.
java.lang.reflect.AccessibleObject : java.lang.reflect.Method common extends java.lang.Object.
java.lang.reflect.Member : java.lang.reflect.Method common .
EDU.neu.ccs.demeter.AroundContinuation : __Subtraversal common extends java.lang.Object.
EDU.neu.ccs.demeter.dj.Collection = <elements> java.lang.Object.
end class graph =============================
begin
Exception in thread "main" java.lang.RuntimeException: 
java.lang.IllegalAccessException
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$VisitorTraverser.invokeVisitorMethod(ObjectGraphSlice.java:251)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$VisitorTraverser.before(ObjectGraphSlice.java:237)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:133)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:191)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:197)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:191)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:191)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:197)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:191)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:197)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdge(ObjectGraphSlice.java:191)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseEdges(ObjectGraphSlice.java:172)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverseNode(ObjectGraphSlice.java:146)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice$Traverser.traverse(ObjectGraphSlice.java:115)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice.traverse(ObjectGraphSlice.java:70)
	at EDU.neu.ccs.demeter.dj.ObjectGraphSlice.traverse(ObjectGraphSlice.java:63)
	at Cd_graph.countInhRelsDJ(Cd_graph.java:41)
	at Main.main(Main.java:27)