Swati,
Which version of Castor are you using?
--Keith
Swati Singhal wrote:
Hi,
I have an XML file which we will be unmarshalling
using Castor.
If I write a CustomHandler, it works just fine.
However, we have the dates all over the XML, so I
decided to write a GeneralizedFieldHandler.
Now, my mapping.xml has an entry like:
<class name="com.dataaccess.beans.SoftBean">
<field name="swTime" type="string"
handler="com.businesslogic.DateHandler">
<bind-xml name="TIME" node="element"/>
</field>
</class>
My DateHandler is exactly what is there on your site :
import
org.exolab.castor.mapping.GeneralizedFieldHandler;
import org.exolab.castor.mapping.FieldDescriptor;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* The FieldHandler for the Date class
*
*/
public class MyDateHandler
extends GeneralizedFieldHandler
{
private static final String FORMAT = "MM/dd/yyyy
hh:mm:ss";
/**
* Creates a new MyDateHandler instance
*/
public MyDateHandler() {
super();
}
/**
* This method is used to convert the value when
the
* getValue method is called. The getValue method
will
* obtain the actual field value from given
'parent' object.
* This convert method is then invoked with the
field's
* value. The value returned from this method will
be
* the actual value returned by getValue method.
*
* @param value the object value to convert after
* performing a get operation
* @return the converted value.
*/
public Object convertUponGet(Object value) {
if (value == null) return null;
SimpleDateFormat formatter = new
SimpleDateFormat(FORMAT);
Date date = (Date)value;
return formatter.format(date);
}
/**
* This method is used to convert the value when
the
* setValue method is called. The setValue method
will
* call this method to obtain the converted value.
* The converted value will then be used as the
value to
* set for the field.
*
* @param value the object value to convert before
* performing a set operation
* @return the converted value.
*/
public Object convertUponSet(Object value) {
SimpleDateFormat formatter = new
SimpleDateFormat(FORMAT);
Date date = null;
try {
date = formatter.parse((String)value);
}
catch(ParseException px) {
throw new
IllegalArgumentException(px.getMessage());
}
return date;
}
/**
* Returns the class type for the field that this
* GeneralizedFieldHandler converts to and from.
This
* should be the type that is used in the
* object model.
*
* @return the class type of of the field
*/
public Class getFieldType() {
return Date.class;
}
/**
* Creates a new instance of the object described
by
* this field.
*
* @param parent The object for which the field is
created
* @return A new instance of the field's value
* @throws IllegalStateException This field is a
simple
* type and cannot be instantiated
*/
public Object newInstance( Object parent )
throws IllegalStateException
{
//-- Since it's marked as a string...just
return null,
//-- it's not needed.
return null;
}
}
However, when I run, i get an error:
Exception:unable to add 'TIME' to <SOFTWARE> due to
the following exception:
--- Begin Exception ---<<<
java.lang.IllegalArgumentException: Type conversion
error: could not set value of
[EMAIL PROTECTED] with value of
type java.lang.String
at
org.exolab.castor.mapping.loader.FieldHandlerImpl.setValue(FieldHandlerImpl.java:500)
at
org.exolab.castor.xml.UnmarshalHandler.endElement(UnmarshalHandler.java:1053)
at
org.exolab.castor.xml.UnmarshalHandler.endElement(UnmarshalHandler.java:1121)
at
org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
org.apache.xerces.parsers.XML11Configuration.parse(Unknown
Source)
at
org.apache.xerces.parsers.DTDConfiguration.parse(Unknown
Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown
Source)
Any help would be appreciated.
Thanks
-Swati
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