crimson error encountered

[JayaSiji Gopal]

Hi,

I have the following program to write an xml file.

 
 
import java.util.Calendar;
import java.io.*;
import javax.xml.parsers.*;
import org.w3c.dom.*;
import org.apache.xpath.*;
 
public class CreateXML {
    
    public static final String JANUARY = "January";
    public static final String FEBRUARY = "February";
    public static final String MARCH = "March";
    public static final String APRIL = "April";
    public static final String MAY = "May";
    public static final String JUNE = "June";
    public static final String JULY = "July";
    public static final String AUGUST = "August";
    public static final String SEPTEMBER = "September";
    public static final String OCTOBER = "October";
    public static final String NOVEMBER = "November";
    public static final String DECEMBER = "December";    
    
    Document doc;
    Element root;
    Writer output = null;
    
    /** Creates a new instance of createXML */
    public CreateXML()
    {
    }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
        // TODO code application logic here
        CreateXML cXML = new CreateXML();
        cXML.getDateAndTime();        
    }
    
    public void getDateAndTime()
    {
        Calendar cal = Calendar.getInstance();
        int year = cal.get(Calendar.YEAR);
        System.out.println(year);
        int month = cal.get(Calendar.MONTH);
        System.out.println(month);
        buildXML(year,month);
    }
    
    public void buildXML(int year, int month) 
    {
        try {
            //use buffering
    File xmlFile = new File("C:\\Jayashree\\Hugin Publication System\\XML\\Calender.xml");
            output = new BufferedWriter( new FileWriter(xmlFile));
            output.write("<?xml version='1.0'?>");
            DocumentBuilderFactory docBuildFac =   DocumentBuilderFactory.newInstance();
            DocumentBuilder docBuild = docBuildFac.newDocumentBuilder();
            doc = docBuild.newDocument();
            root = doc.createElement("calendar");
            doc.appendChild(root); //the root element
            // add the child elements
            Node yr = createYearNode(year); //line 74
            doc.appendChild(yr);
            Node months = createMonthsNode(month);
            doc.appendChild(months);
            NodeSet mon = createMonthNode(month);
            for(int i=0;i<mon.getLength();i++)
            {
                months.appendChild(mon.getCurrentNode());
            }            
            // write the XML document to a System.out
            stepThrough(root);
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }        
    }
    
    public void stepThrough(Node currentNode)
    {
        try
        {
            switch(currentNode.getNodeType())
            {
               // Document node (root node of tree)
               case Node.DOCUMENT_NODE:
               {
                  Document doc = (Document)currentNode;
                  output.write("<" + doc.getDocumentElement().getNodeName() + ">");
                  NodeList children = doc.getChildNodes();                 
                  for(int i = 0; i < children.getLength(); i++)            
                      stepThrough(children.item(i));
                  output.write("</" + doc.getDocumentElement().getNodeName() + ">" );
               } 
               break;
               // Element node
               case Node.ELEMENT_NODE: 
               { 
                   if(currentNode.getNodeName().equalsIgnoreCase("year"))
                   {
                       output.write("<" + currentNode.getNodeName() + ">");
                       output.write(currentNode.getNodeValue());
                       output.write("</" + currentNode.getNodeName() + ">");
                   }
                   else if(currentNode.getNodeName().equalsIgnoreCase("months"))
                   {
                       output.write("<" + currentNode.getNodeName() + ">");
                       NodeList children = currentNode.getChildNodes();                 
                       for(int i = 0 ; i < children.getLength(); i++)
                       {
                           Node child = children.item(i);
                           output.write("<" + child.getNodeName() + ">");
                           output.write(child.getNodeValue());
                           output.write("</" + child.getNodeName() + ">");
                       } 
                       output.write("</" + currentNode.getNodeName() + ">");
                   }
                }
                break;        
            }
            output.close();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }        
    }
    
    public Node createYearNode(int yr)
    {
        Element year = doc.createElement("year");
        year.appendChild(doc.createTextNode(""+yr));
        return year;
    }
    
    public Node createMonthsNode(int mon)
    {
        Element months = doc.createElement("months");
        months.appendChild(months);
        return months;
    }
    
    public NodeSet createMonthNode(int mon)
    {
        Element month ;
        NodeSet set = new NodeSet();
        switch(mon)
        {
           case 1:
                month = doc.createElement("month"); 
                month.appendChild(doc.createTextNode(JANUARY));
                set.addElement(month);
                break;
           case 2:
                month = doc.createElement("month");
                month.appendChild(doc.createTextNode(JANUARY));
                set.addElement(month);
                month = doc.createElement("month");
                month.appendChild(doc.createTextNode(FEBRUARY));
                set.addElement(month);
                break;
           case 3:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               break;
           case 4:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               break;
            case 5:
                month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               break;
            case 6:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JUNE));
               set.addElement(month);
               break;
            case 7:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JUNE));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JULY));
               set.addElement(month);
               break;
            case 8:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JUNE));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JULY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(AUGUST));
               set.addElement(month);               
               break; 
            case 9:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JUNE));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JULY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(AUGUST));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(SEPTEMBER));
               set.addElement(month);
               break;
            case 10:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JUNE));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JULY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(AUGUST));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(SEPTEMBER));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(OCTOBER));
               set.addElement(month);
               break;
            case 11:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JUNE));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JULY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(AUGUST));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(SEPTEMBER));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(OCTOBER));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(NOVEMBER));
               set.addElement(month);
               break;
            case 12:
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JANUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(FEBRUARY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MARCH));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(APRIL));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(MAY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JUNE));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(JULY));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(AUGUST));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(SEPTEMBER));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(OCTOBER));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(NOVEMBER));
               set.addElement(month);
               month = doc.createElement("month");
               month.appendChild(doc.createTextNode(DECEMBER));
               set.addElement(month);               
               break;
        }   
        return set;
    }
}

I get the following error:

org.apache.crimson.tree.DomEx: HIERARCHY_REQUEST_ERR: This node isn't allowed there.
at org.apache.crimson.tree.XmlDocument.appendChild(XmlDocument.java:661)
at CreateXML.buildXML(CreateXML.java:74)
at CreateXML.getDateAndTime(CreateXML.java:57)
at CreateXML.main(CreateXML.java:47)

Could someone plz tell me the reason for this??

[William Brogden]

Why you chose to reproduce the whole thing in your post when the error was in line 74, I just can't imagine.

doc = docBuild.newDocument();
            root = doc.createElement("calendar");
            doc.appendChild(root); //the root element  

Look at the JavaDocs for Node Interface, appendChild method in the org.w3c.dom package.
You will instantly see that HIERARCHY_REQUEST_ERR can be thrown if the Node is of type Document and you try to append an Element to it.
Sheesh!
Bill

[JayaSiji Gopal]

Hi!

Thank u for the solution. My program just works fine. Yep!! I realize my mistake.

However, I do come across people in this forum, who ask for the whole code to understand the error!!!