Dynamic Class loading from XML

public void loadItems(File aFile){
		Equipment testItem;
		try {
			Document doc = parser.build(aFile);
			Element root = doc.getRootElement();
			List<?> objects = root.getChildren();
			Iterator<?> i = objects.iterator();
			while(i.hasNext()){
				testItem = (Equipment)Global.rwtext.loadData(Equipment.class, (Element)i.next());
				//equipment is a HashMap
				equipment.put(testItem.getID(),testItem);
			}
		} catch (JDOMException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public Object parseData(String s){
		// try to split strings into multiple strings in case of multiple IDs
		// in case of a single int, 'ints' will contain the one int
		String[] ints = s.split(";");
		try{
			ArrayList<Integer> IDs = new ArrayList<Integer>();
			for(String str: ints){
				IDs.add(Integer.parseInt(str));
			}
			//so it later doesn't get recognised as an int array, but just an int
			if(IDs.size() == 1){
				return (int)IDs.get(0);
			}
			return convertIntegers(IDs);
		} catch(NumberFormatException e){// thrown when s is a string or double, float..
			ints = null;
			try{
				return Double.parseDouble(s);
			} catch(NumberFormatException nfe){
				if(s.equalsIgnoreCase("true")){
					return true;
				}
				else if(s.equalsIgnoreCase("false")){
					return false;
				}
				return s;
			}
		}
	}

	public Object loadData(Class<?> cl, Element el){
		// creates a class of given type, coming from the XML element el
		
		ArrayList<Object> constrParam = new ArrayList<Object>();
		@SuppressWarnings("unchecked")
		List<Element> properties = el.getChildren();
		// id is given as attribute for xquery for easy lookup, so add id to constrparam first
		constrParam.add(Integer.parseInt(el.getAttributeValue("id")));
		Iterator<Element> i = properties.iterator();
		while(i.hasNext()){
			Element child = i.next();
			// if child has more children, those are dealt with in the constructor, child is passed as a parameter
			if(!child.getChildren().isEmpty()){
				constrParam.add(child);
			}
			else{
				constrParam.add(parseData(child.getText()));
			}
		}
		Class<?>[] paramClass = new Class[constrParam.size()];//soorten parameters
		for(int j = 0;j<paramClass.length;j++){
			paramClass[j] = constrParam.get(j).getClass();
		}
		try {
			Constructor<?> objCtor = cl.getConstructor(paramClass);
			return objCtor.newInstance(constrParam.toArray());
		} catch (NoSuchMethodException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}
		return null;
	}
	
	public static int[] convertIntegers(ArrayList<Integer> integers)//ArrayList -> int[]
	{
		int[] ret = new int[integers.size()];
		for (int i=0; i < ret.length; i++)
		{
			ret[i] = integers.get(i).intValue();
		}
		return ret;
	}