Override internal Marshaller

[steeveb]

Hi all,

I would like to know if there is an easy way to override an internal Marshaller within Errai framework, like DateMarshaller?

I created a custom marshaller to override DateMarshaller, and the only way I found was to prepend my class in the classpath with the same package+class name than DateMarshaller. I suppose there is a better way to do this?

Thanks,

Steeve

[ddadlani]

Hello Steeve,

Have you looked at the documentation for custom marshallers? The link is http://docs.jboss.org/errai/3.1.1.Final/errai/reference/html_single/#sid-5931328_Marshalling-CustomMarshallers. Is this what you are trying to do?

Cheers,
Divya

[steeveb]

Hello Divya,

I already had a look on the documentation, and I created a CustomMarshaller in that way. The problem I got is that there was an exception because I was trying to remap java.util.Date serialization. So I used my workaround to make it work, and I was just wondering if there was a builtin way to do this as I didn't find this in the documentation.

Regards,

Steeve

[werrenmi]

Hello Steve

Can you please post the exception and your custom marshaller?

Regards

Michel

[steeveb]

Hi Michel,

Here is the exception I got:

java.lang.IllegalStateException: Mapping definition collision for java.util.Date

[ERROR] Already have: MappingDefinition [mappingClass=java.util.Date, clientMarshallerClass=class org.jboss.errai.marshalling.client.marshallers.CustomDateMarshaller, serverMarshallerClass=null]

[ERROR] Attempted to add: MappingDefinition [mappingClass=java.util.Date, clientMarshallerClass=class org.jboss.errai.marshalling.client.marshallers.DateMarshaller, serverMarshallerClass=null]

And the class I created

package org.jboss.errai.marshalling.client.marshallers;


import java.util.Date;


import org.jboss.errai.marshalling.client.api.MarshallingSession;
import org.jboss.errai.marshalling.client.api.annotations.ClientMarshaller;
import org.jboss.errai.marshalling.client.api.annotations.ServerMarshaller;
import org.jboss.errai.marshalling.client.api.json.EJValue;
import org.jboss.errai.marshalling.client.marshallers.AbstractNullableMarshaller;


import com.google.gwt.i18n.client.DateTimeFormat;


@ServerMarshaller(Date.class)
@ClientMarshaller(Date.class)
public class CustomDateMarshaller extends AbstractNullableMarshaller<Date> {


  private DateTimeFormat format = DateTimeFormat.getFormat("yyyy-MM-dd'T'HH:mm:ssZ");


  @Override
  public Date[] getEmptyArray() {
  return new Date[0];
  }


  @Override
  public Date doNotNullDemarshall(EJValue o, MarshallingSession ctx) {
  if (o.isString() != null) {
  return format.parse(o.isString().stringValue());
  }
  return null;
  }


  @Override
  public String doNotNullMarshall(Date o, MarshallingSession ctx) {
     return "\"" + format.format(o) +"\"";
  }


}

I would like to replace the internal DateMarshaller by my implementation.

Regards,

Steeve

[randalmay]

Were you able to override the default marshaller?  I am trying to override the default Object Marshaller, so I am very interested in this.