Accessing CSS style of SVG elements from java code

[Matiouz Matiouz]

Hello,

I'm using batik 1.7 under windows, and I'm programming in java 5.0.

I'm trying to read the css style of elements (circle, rectangle....) contained 
in an SVG file.
I can iterate through all these elements but I can't find their style.

Here is the code I'm using:
---------------------------
    private void decodeFile() {
        String mapFile = "D:/maps/rectangle.svg";
        try {
        String parser = XMLResourceDescriptor.getXMLParserClassName();
        SAXSVGDocumentFactory f = new SAXSVGDocumentFactory(parser);
        String uri = new File(mapFile).toURI().toString();
        Document doc = f.createDocument(uri);

        SVGDocument svgDocument = (SVGDocument) doc;
        SVGElement root = svgDocument.getRootElement();

        parse(root);

    } catch (IOException ex) {
      ex.printStackTrace();
    }
  }
  
    private void parse(Node node) {
        System.out.println("Name: " + node.getNodeName());
        System.out.println();
        
        StyleMap styleMap = null;
        
        if (node instanceof SVGOMRectElement) {
            styleMap = ((SVGOMRectElement) node).getComputedStyleMap(null);
        }

        NodeList nodeList = node.getChildNodes();
    for (int i = 0; i < nodeList.getLength(); i++) {
      Node childnode = (Node) nodeList.item(i);
      parse(childnode);
    }
  }
---------------------------


Here is the SVG file:
---------------------------
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" 
  "http://www..w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";>
<svg width="10cm" height="5cm" viewBox="0 0 1000 500"
     xmlns="http://www.w3.org/2000/svg"; version="1.1">
  <defs>
    <style type="text/css"><![CDATA[
      rect {
        fill: yellow;
        stroke: blue;
        stroke-width: 3
      }
    ]]></style>
  </defs>
  <rect x="200" y="100" width="600" height="300" />
</svg>
---------------------------
The CSS style is defined in the def section and should apply to the whole 
document (it is displayed correctly in firefox).

When
running the program, the rectangle element is correctly identified as a
SVGOMRectElement but getComputedStyleMap returns null.
Could you tell me how I could retrieve the style?


note 1:
I've also tried to use 
CSSValue s =((SVGStylable)svgElement).getStyle().getPropertyCSSValue("fill");
but I'm getting a null pointer exception at
  at 
org.apache.batik.dom.svg.SVGStylableElement$StyleDeclaration.<init>(SVGStylableElement.java:645)
    at 
org..apache.batik.dom.svg.SVGStylableElement.getStyle(SVGStylableElement.java:256)
because cssEngine is null (but I don't know why and I'm not sure this is the 
real cause of the problem).

note 2:
XMLResourceDescriptor.getXMLParserClassName() returns null so I've tried to 
hardcode the parser class name
SAXSVGDocumentFactory f = new 
SAXSVGDocumentFactory("org.apache..xerces.parsers.SAXParser");
but the result is the same.

Any help will be greatly appreciated.