import org.newdawn.slick.svg.Loader; //导入依赖的package包/类
/**
 * @see org.newdawn.slick.svg.inkscape.ElementProcessor#process(org.newdawn.slick.svg.Loader, org.w3c.dom.Element, org.newdawn.slick.svg.Diagram, org.newdawn.slick.geom.Transform)
 */
public void process(Loader loader, Element element, Diagram diagram,
		Transform transform) throws ParsingException {

	String ref = element.getAttributeNS("http://www.w3.org/1999/xlink", "href");
	String href = Util.getAsReference(ref);
	
	Figure referenced = diagram.getFigureByID(href);
	if (referenced == null) {
		throw new ParsingException(element, "Unable to locate referenced element: "+href);
	}
	
	Transform local = Util.getTransform(element);
	Transform trans = local.concatenate(referenced.getTransform());
	
	NonGeometricData data = Util.getNonGeometricData(element);
	Shape shape = referenced.getShape().transform(trans);
	data.addAttribute(NonGeometricData.FILL, referenced.getData().getAttribute(NonGeometricData.FILL));
	data.addAttribute(NonGeometricData.STROKE, referenced.getData().getAttribute(NonGeometricData.STROKE));
	data.addAttribute(NonGeometricData.OPACITY, referenced.getData().getAttribute(NonGeometricData.OPACITY));
	data.addAttribute(NonGeometricData.STROKE_WIDTH, referenced.getData().getAttribute(NonGeometricData.STROKE_WIDTH));
	
	Figure figure = new Figure(referenced.getType(), shape, data, trans);
	diagram.addFigure(figure);
}
 

import org.newdawn.slick.svg.Loader; //导入依赖的package包/类
/**
 * Process a document extracting all the elements that the processor is 
 * interested in and producing appropriate diagram components for the
 * element.
 * 
 * @param loader The loader/context of the parsing
 * @param element The element to be processed
 * @param diagram The diagram to be built
 * @param transform The transform to apply to all elements at this level
 * @throws ParsingException Indicates an invalid content to an element
 */
public void process(Loader loader, Element element, Diagram diagram, Transform transform) throws ParsingException;