Somehow my first answer didn't make it to the list. Hopefully, this works.
It looks like you forgot to set the Mapping object. mm.setMapping(...); If you don't do that, the marshaller doesn't really know how to handle classes. You either should add a mapping file and set it, or use the source generator to generate your java classes from an XML schema. The latter is at least my preferred way of doing this. Hope this helps Dr. Hartmut Kocher Leonberg Germany -----Ursprungliche Nachricht----- Von: Mark A. Sellers [mailto:[EMAIL PROTECTED]] Gesendet: Dienstag, 23. April 2002 20:47 An: [EMAIL PROTECTED] Betreff: Re: [castor-dev] How do I marshall a collection of my class objects? In my editor, the Marshaller.java class (which I downloaded from the CVS link) line 672 is: name = classDesc.getXMLName(); ?????????? > -----Original Message----- > From: Keith Visco [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, April 23, 2002 12:22 PM > To: [EMAIL PROTECTED] > Subject: Re: [castor-dev] How do I marshall a collection of my class > objects? > > > > Hi Mark, > > I'll take a look into it. However, your stacktrace cannot come from the > CVS version of Castor...line 672 of Marshaller in the CVS cannot > possibly throw an exception: > > 672: if (object == null) > > In any case, I'll try out your example and see what I get. > > Thanks, > > --Keith > > "Mark A. Sellers" wrote: > > > > 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 > > > > ----------------------------------------------------------- > > If you wish to unsubscribe from this mailing, send mail to > > [EMAIL PROTECTED] with a subject of: > > unsubscribe castor-dev > > ----------------------------------------------------------- > If you wish to unsubscribe from this mailing, send mail to > [EMAIL PROTECTED] with a subject of: > unsubscribe castor-dev > ----------------------------------------------------------- If you wish to unsubscribe from this mailing, send mail to [EMAIL PROTECTED] with a subject of: unsubscribe castor-dev ----------------------------------------------------------- If you wish to unsubscribe from this mailing, send mail to [EMAIL PROTECTED] with a subject of: unsubscribe castor-dev
