Re: [castor-dev] FieldHandler question

[Farris, Greg]

In my case I stored dates as longs and converted them in my field handlers
because the version of castor I was using didn't have GregorianCalendar as a
datatype.

Greg Farris


-----Original Message-----
From: Alagesan, Rajkumar [mailto:ralagesan@;ets.org] 
Sent: Wednesday, November 13, 2002 3:17 PM
To: [EMAIL PROTECTED]
Subject: Re: [castor-dev] FieldHandler question

Going by the message it appears that the castor tries to
construct the calendar object(and since it's an abstract class,
it can't create one). But, I wonder why would castor even
try instantiating when I have the field handler written for
the field. Is it that my field handler never gets called before
castor tries to create an instance of that type?

Rajkumar

-----Original Message-----
From: Alagesan, Rajkumar 
Sent: Wednesday, November 13, 2002 3:12 PM
To: [EMAIL PROTECTED]
Subject: [castor-dev] FieldHandler question


Hi,

I try to use java.util.Collection for an xml field 'Birthdate' and wrote my
Field 
Handler.

I have written a mapping file that looks like 

<class name="org.ets.enterprise.profile.valueobject.PersonValueObject" >
  <field name="LanguageTypeCode" type="string"/>
  <field name="BirthDate" type="java.util.Calendar" handler="myHandler"/>
</class>

When I try to unmarshal the Xml, I get the following error

java.lang.IllegalStateException: Java schema change: Class
java.util.Calendar can no longer be const
ructed: java.util.Calendar{file: [not available]; line: 3; column: 16}
java.lang.NullPointerException

my xml data file looks like this:-

<?xml version="1.0" encoding="UTF-8"?>
<person-value-object>
    <BirthDate>2002-10-3 11:10:50</BirthDate>   
    <languagetypecode>1</languagetypecode>    
</personvalueobject>

myHandler.java code

import org.exolab.castor.mapping.GeneralizedFieldHandler;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;
public class myHandler extends GeneralizedFieldHandler{
    public java.lang.Class getFieldType(){
        return java.util.Calendar.class;
    }
    public  java.lang.Object convertUponSet(java.lang.Object value){
        Calendar c = null;
        try{
        SimpleDateFormat formatter = new SimpleDateFormat ("yyyy-MM-yy
hh:mm:ss");
        Date d = formatter.parse((String)value);
        c= Calendar.getInstance();
        c.setTime(d);
        }
        catch(Exception e){
            System.out.println("setvalue"+e);
        }
        return c;

    }
    public  java.lang.Object convertUponGet(java.lang.Object value){
        Calendar c = (Calendar)value;
        Date d = c.getTime();
        SimpleDateFormat formatter = new SimpleDateFormat ("yyyy-MM-yy
hh:mm:ss");
        String s = formatter.format(d);
        return s;

    }
}

Let me know where I am going wrong?

Thanks,
Raj



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