[antlr-interest] tree walker executes method call twice?

[Safiye Celik]

Hi,
Thanks for help, but I cannot execute "dot" command in eclipse. I get the
error "exception: java.io.IOException: cannot run program "dot":
CreateProcess" error=2, The system cannot find the file specified". When I
try to execute the same command from the command line (after changing
directory to the directory where .dot file exists), I get the error ""dot"
is not recognized as an internal or external command, operable program or
batch file". Where is the dot executable in the Windows system? Or is it a
downloadable file? If so, where can I download it from?

2009/8/19 Jim Idle <jimi at temporal-wave.com>

> Safiye Celik wrote:
> > Hi,
> > How do you create DoubleWalk1.jpg tree? I wanna display my tree as
> > yours which is more understandable for a human, but I cannot get such
> > a tree. I use JTree component constructed from a DefaultTreeModel
> > component, and the tree I get is as in the attachment, which is in
> > expandable folder format and not readable enough. And I could not find
> > any component in Java to display a tree as yours. I would be glad if
> > you share your way. Thanks.
> Search the past posting for how to generate a dot (www.graphviz.org)
> specification from the AST and then run dot:
>
>  // Use the ANLTR built in dot generator
>                    //
>                    DOTTreeGenerator gen = new DOTTreeGenerator();
>
>                    // Which we can cause to generate the DOT specification
>                    // with the input file name suffixed with .dot. You
> can then use
>                    // the graphviz tools or zgrviewer (Java) to view
> the grahpical
>                    // version of the dot file.
>                    //
>                    source = source.substring(0, source.length()-3);
>                    String outputName = source + "dot";
>
>                    System.out.println("    Producing AST dot (graphviz)
> file");
>
>                    // It produces a jguru string template.
>                    //
>                    StringTemplate st = gen.toDOT(t, new
> CommonTreeAdaptor(), _treeST, _edgeST);
>
>                    // Create the output file and write the dot spec to it
>                    //
>                    FileWriter outputStream = new FileWriter(outputName);
>                    outputStream.write(st.toString());
>                    outputStream.close();
>
>                    // Invoke dot to generate a .png file
>                    //
>                    System.out.println("    Producing png graphic for
> tree");
>                    pStart = System.currentTimeMillis();
>                    Process proc = Runtime.getRuntime().exec("dot -Tpng
> -o" + source + "png " + outputName);
>                    proc.waitFor();
>                    stop = System.currentTimeMillis();
>                    System.out.println("      PNG graphic produced in "
> + (stop - pStart) + "ms.");
>
>
> Jim
>
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-- 
-safiye
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