import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;
import org.jdom.*;
import org.jdom.output.XMLOutputter;
import java.io.*;
import java.util.*;



public class XmlChecker {
	//?xml:stylesheet type="text/xsl" href="valformad.xsl">
	public static void main(String[] args){
		if (args.length == 0)
			System.out.println("måste ge en xml fil som argument!");
	try{
		//uppg5a
		SAXBuilder builder = new SAXBuilder();
		String filen = args[0];	
		Document doc = builder.build(new File(filen));	
		XMLOutputter fmt = new XMLOutputter("  ", true);
		fmt.output(doc, System.out);
		System.out.println(filen + " is wellformed!"+"\n");
		
		//uppg5b
		Element root = doc.getRootElement();
		listNodes(root);
	}
	
	catch (JDOMException e) {
		//hittar fel!!
		System.out.println(args[0] + " ej wellformed!");
		System.out.println(" kolla " + e.getMessage());
	}
	 catch (Exception e) {
	 e.printStackTrace();
      }
	
}

public static void listNodes(Element elemroot){
	//printSpaces(depth);       Object o,int depth, 
	
	//if (o instanceof Element) {
	//	Element elem = (Element) o;
		System.out.println("Element: " +elemroot.getName());
		System.out.println("VALUE:   "+elemroot.getContent());
		
		List children = elemroot.getChildren();
	     
		      for (int i=0;i<children.size();i++){
			 listNodes((Element)children.get(i));
		      }
		/*List children = elem.getContent();
		Iterator iter = children.iterator();

		while (iter.hasNext()) {
			Object child = iter.next();
			listNodes(child, depth+1,elemroot);
		}*/
	}

	/*else if (o instanceof Document) {
		System.out.println("Document");
		Document doc = (Document) o;
		List children = doc.getContent();
		Iterator iter = children.iterator();
			while (iter.hasNext()){
				Object child = iter.next();
			listNodes(child, depth+1,elemroot);
			}
		}

		else if (o instanceof Comment) {
				System.out.println("Comment");
		}

		else if (o instanceof CDATA) {
			System.out.println("CDATA section");
		}
		else if (o instanceof EntityRef) {
			System.out.println("entity reference!");
		}
		else if (o instanceof ProcessingInstruction) {
			System.out.println("Processing Instruction");
    }
    else {  
	    System.out.println("Unexpected type: " + o.getClass());
    }
    
  
  
  private static void printSpaces(int n) {
    
    for (int i = 0; i < n; i++) {
      System.out.print(' '); 
    }
    
  }*/

}