It seems like someone has already created a graphviz implementation in Java.One promising java-based approach that looks like it might have moved on since I last looked a year or so ago is JGraph:
http://jgraph.sourceforge.net/jgraph.shtml
If you came up with your own layout algorithm (which perhaps isn't so hard?) which could produce coordinates for each of the items in the dependency graph, then you could also think about using XSL to go from Ant -> SVG (or whatever) directly?
Patrick
It is a working implementation (from the samples on the site -- I have not yet tried it out myself).
http://jzgraph.sourceforge.net/
*"JzGraph* is an open source *Java* package for *hierarchical graph drawing* based on the open source *Graphviz <http://www.graphviz.org>* tool with some nice additions like *bus routing* and *attributed text* labels (see screen-shots <http://jzgraph.sourceforge.net/#screenshots> below).
Input and output in Graphviz .dot text file format which is very simple to use. Some extensions have been made to the .dot file output to accommodate for the bus routings and attributed text labels so it is not compatible with Graphviz and no effort has made to do so. The demo also render graph output to .png file using the Java 1.4 javax.imageio package."
Since this already has the algorithms to do the layout one could simply spit out the coordinates into SVG.
Then the flow would be:
build.xml --> <XslScript> --> build.dot --> <JzGraphWithSVGOutputOption> --> build.svg
Alec Noronha
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