Using Batik, loads a SVG document, executes onload scripts, and then serializes the document and prints it, to capture script-generated content. Originally http://esw.w3.org/SOMDump

SOMDump.java

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.apache.batik.bridge.BaseScriptingEnvironment;
import org.apache.batik.bridge.BridgeContext;
import org.apache.batik.bridge.GVTBuilder;
import org.apache.batik.bridge.UserAgentAdapter;
import org.apache.batik.dom.svg.SAXSVGDocumentFactory;
import org.apache.batik.util.XMLResourceDescriptor;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.DOMSerializer;
import org.apache.xerces.dom3.bootstrap.DOMImplementationRegistry;

/**
 * @author Björn Höhrmann
 *
 */
public class SOMDump
{
  void run(String[] args) throws Exception
	{
        String parser = XMLResourceDescriptor.getXMLParserClassName();
        SAXSVGDocumentFactory f = new SAXSVGDocumentFactory(parser);
        
        String uri = args[0];
        Document doc = f.createDocument(uri);
        
        UserAgentAdapter userAgent = new UserAgentAdapter();
        GVTBuilder builder         = new GVTBuilder();
        BridgeContext ctx          = new BridgeContext(userAgent);
        ctx.setDynamic(true);

        builder.build(ctx, doc);
        BaseScriptingEnvironment scriptEnvironment 
            = new BaseScriptingEnvironment(ctx);
        
        Element script = null;

        if (args.length == 2)
        {
        	script = doc.createElementNS("http://www.w3.org/2000/svg", "script");
        	script.setAttributeNS("http://www.w3.org/1999/xlink", "href", args[1]);
        	script.setAttributeNS(null, "type", "text/ecmascript");
        	doc.getDocumentElement().appendChild(script);
        }
        
        scriptEnvironment.loadScripts();
        scriptEnvironment.dispatchSVGLoadEvent();

        if (script != null)
        	script.getParentNode().removeChild(script);
        
        System.setProperty(DOMImplementationRegistry.PROPERTY,
        	"org.apache.xerces.dom.DOMImplementationSourceImpl");
        
        DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();

        DOMImplementationLS impl = 
        	(DOMImplementationLS)registry.getDOMImplementation("LS");
        
        DOMSerializer writer = impl.createDOMSerializer();
        System.out.println(writer.writeToString(doc)/*.substring(0,2048)*/);
        
	}

	public static void main(String[] args) throws Exception
	{
		if (args.length < 1)
		{
			System.err.println("Usage: foo bar.svg [ baz.es ]");
			return;
		}
		(new SOMDump()).run(args);
	}
}