XML payload & JMS

Hi All

Hope I can explain my problem clearly.

I have to post a XML payload to a JMS Topic.

This will be done from one of our POJO class after it performs some business validation.
In this class I have the content in a Java Object which has a big Object tree.
I have to convert this Java Object into XML.

My question to you all is

Should i perform this Java Object to XML conversion logic in the POJO class itself. Because the Java object can vary depending upon situation to situation.

As the JMS Topic takes in a XML content
I would want to know what would be the most effecient way of converting this Java object into XML & sending the XML to the JMS topic.

Kindly respond

Mahesh