Graphical Output from SVG(XML) file

[mfc2005]

I am writing a program to read in an SVG (Scalable Vector Graphics) XML application file and simply display the graphical output of the tags using the attributes within the tags. I have read in the file using a file reader and parsed it using a DOM (see Below), iterating through to obtain the values required for the graphical objects. The problem I am having is that I am new to java and am unsure of an appropriate way to handle the attributes for each object obtained. I currently put them in a hashmap and then pass them to my graphics class but I am unsure when to use the paint method and how is best to pass the attributes i.e. should they be passed as attributes individually or as a shape object? How would you do this?

Example code:

import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.util.HashMap;
import javax.swing.*;

import java.awt.*;
import java.util.*;


public class TestDOM extends JComponent
{
private Container c;

public static void main( String [] args ) throws Exception
{

JFrame frame = new JFrame("Stereo");
Container c = frame.getContentPane();
c.setLayout(new BorderLayout());

//c.add(new TestDOM(), BorderLayout.CENTER);
frame.setSize(800, 600);
c.setBackground(Color.WHITE);
frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
TestDOM test = new TestDOM(c);
frame.setVisible(true);
}

public TestDOM(Container _c)throws Exception
{
c = _c;
createRoot();
}

public void createRoot()throws Exception
{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder parser = factory.newDocumentBuilder();
Document document = parser.parse( "Stereo01.svg" );

//Pick out data from SVG file
Element svg = document.getDocumentElement();
Attr svgWidth= svg.getAttributeNode("width");
Attr svgHeight = svg.getAttributeNode("height");
String widthVal = svgWidth.getValue();
String heightVal = svgHeight.getValue();
System.out.println("SVG Width: " +widthVal);
System.out.println("SVG Height: " +heightVal);
getElem(svg);

}

public void getElem(Element svg)
{
NodeList rectList = svg.getElementsByTagName("rect");

for(int i=0; i<rectList.getLength(); i++)
{
Node rect = rectList.item(i);
NamedNodeMap rectMap = rect.getAttributes();
HashMap rMap = new HashMap();

for(int iattr = 0; iattr < rectMap.getLength(); iattr++)
{
Node attr = rectMap.item(iattr);
String attrName = attr.getNodeName();
String attrValue = attr.getNodeValue();
//System.out.println("Attr: " + attrName);
//System.out.println("Value: " + attrValue);
rMap.put(attrName, attrValue);
//String x = (String)hMap.get("x");
//if (x != null)
//{
// System.out.println("x Attr" + x);
//}

}
String xRect = (String)rMap.get("x");
String yRect = (String)rMap.get("y");
String rectWidth = (String)rMap.get("width");
String rectHeight = (String)rMap.get("height");
String fillVal = (String)rMap.get("fill");
String strokeVal = (String)rMap.get("stroke");
rectToInt(xRect, yRect, rectWidth, rectHeight, fillVal, strokeVal);

}
NodeList lineList = svg.getElementsByTagName("line");

for(int i=0; i<lineList.getLength(); i++)
{
Node line = lineList.item(i);
NamedNodeMap lineMap = line.getAttributes();
HashMap lMap = new HashMap();

for(int iattr = 0; iattr < lineMap.getLength(); iattr++)
{
Node attr = lineMap.item(iattr);
String attrName = attr.getNodeName();
String attrValue = attr.getNodeValue();
//System.out.println("Attr: " + attrName);
//System.out.println("Value: " + attrValue);
lMap.put(attrName, attrValue);
//String x = (String)hMap.get("x");
//if (x != null)
//{
// System.out.println("x Attr" + x);
//}

}
String xLine1 = (String)lMap.get("x1");
String yLine1 = (String)lMap.get("y1");
String xLine2 = (String)lMap.get("x2");
String yLine2 = (String)lMap.get("y2");
String sWidth = (String)lMap.get("stroke-width");
lineToInt(xLine1, yLine1, xLine2, yLine2, sWidth);

}
}

public void rectToInt(String xRect, String yRect, String rectWidth, String rectHeight, String fillVal, String strokeVal)
{
//rectangle variables from file
int xR = Integer.parseInt(xRect);
System.out.println("Rectangle x: " + xR);
int yR = Integer.parseInt(yRect);
System.out.println("Rectangle y: " + yR);
int rWidth = Integer.parseInt(rectWidth);
System.out.println("Rectangle width: " + rWidth);
int rHeight = Integer.parseInt(rectHeight);
System.out.println("Rectangle height: " + rHeight);
String rFill = fillVal;
System.out.println("Rectangle fill: " + rFill);
String rStroke = strokeVal;
System.out.println("Rectangle stroke: " + rStroke);
c.add(new RectGraphics(xR, yR, rWidth, rHeight));
}

public void lineToInt(String xLine1, String yLine1, String xLine2, String yLine2, String sWidth)
{
//line variables from file
int xL1 = Integer.parseInt(xLine1);
System.out.println("Line x1: " + xL1);
int yL1 = Integer.parseInt(yLine1);
System.out.println("Line y1: " + yL1);
int xL2 = Integer.parseInt(xLine2);
System.out.println("Line x2: " + xL2);
int yL2 = Integer.parseInt(yLine2);
System.out.println("Line y2: " + yL2);
int sWidthLine = Integer.parseInt(sWidth);
System.out.println("Line Stroke-Width: " + sWidthLine);
c.add(new LineGraphics(xL1, yL1, xL2, yL2, sWidthLine));
}

}