Re: [castor-dev] How do I marshall a collection of my class objects?

[Mark A. Sellers]

I tried using the CVS version and still get an NPE exception. Here's what
I'm doing:

package rm.castor;

import java.util.Date;
import java.util.*;
import java.sql.Timestamp;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import org.exolab.castor.xml.*;
import TestObject;
import org.xml.sax.ContentHandler;
import org.apache.xml.serialize.*;

class Castor extends Frame {

        public Castor() {
                addWindowListener(new WindowAdapter() {
                        public void windowClosing(WindowEvent e) {
                                dispose();
                                System.exit(0);
                        }
                });
        }

        public static void main(String args[]) {
                System.out.println("Starting Castor...");
                Castor mainFrame = new Castor();
                mainFrame.setSize(400, 400);
                mainFrame.setTitle("Castor");
                mainFrame.setVisible(true);

    TestObject[] to = new TestObject[2];
    to[0] = new TestObject();
    to[0].setDateOfBirth(new java.util.Date("10/1/2001"));
    to[0].setName("Mark");
    to[1] = new TestObject();
    to[1].setDateOfBirth(new java.util.Date("12/21/1956"));
    to[1].setName("Sandy");

  try {
        FileWriter writer = new FileWriter("C:\\Castor\\cc.xml");
        Marshaller mm = new Marshaller(writer);
      mm.setNamespaceMapping("-//EXOLAB/Castor Object Mapping Schema Version
1.0//EN","http://castor.exolab.org/mapping.xsd";);
      mm.setMarshalAsDocument(true);
        mm.setValidation(false);
        mm.setNSPrefixAtRoot(true);

        mm.marshal(to, writer);

        System.err.println("finished marshalling...");

   } catch (java.io.IOException ioe) {
       System.err.println(ioe.toString());
   } catch ( org.exolab.castor.xml.MarshalException me ) {
        System.err.println(me.toString());
   } catch ( org.exolab.castor.xml.ValidationException ve ) {
        System.err.println(ve.toString());
   }
  }
}

Class TestObject:

import java.util.Date;
public class TestObject implements java.io.Serializable {
   private String name = null;
   private Date dob = null;

   public TestObject() {
      super();
   }

   public TestObject(String name) {
      this.name  = name;
   }

   public Date getDateOfBirth() {
      return dob;
   }

   public String getName() {
      return name;
   }

   public void setDateOfBirth(Date dob) {
      this.dob = dob;
   }

   public void setName(String name) {
      this.name = name;
   }
}

Exception in thread "main" java.lang.NullPointerException
        at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:672)
        at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:540)
        at org.exolab.castor.xml.Marshaller.marshal(Marshaller.java:460)
        at rm.castor.Castor.main(Castor.java:160)

Thanks, Mark Sellers

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