For doing the concurrency control in mapping xml through a timestamp field and this timestamp field in my case is a member of another object, which is encapsulated in the main object.
I am specifying this versioning in the following way:

<version name="lastUpdateEventTS"
column="lastUpdateEventTS"
access="RptCommon"/>

<property name="filterName"/>
<property name="loginID"/>
<property name="queryString"/>
<property name="expressionID"/>
<component name="RptCommon" class="RptCommon">
<property name="lastUpdateActionCode"/>
<property name="lastUpdateEventTS"/>
<property name="lastUpdateUserID"/>
<property name="dateActive"/>
<property name="dateInactive"/>
</component>


RptCommon is encapsulated within the main object and the timestamp field belongs to RptCommon class only.

On deploying, I get the error saying "net.sf.hibernate.MappingException: could not instantiate PropertyAccessor class".

Has anyone any clue on that ?

Learn how PropertyAccessors work and what the access="xxx" setting really does then develop a custom PropertyAccessor accessing the timestamp value.

Thanks for the reply.
Could you please provide me some useful link, wherein I will get the study material on hibarnate topics like this PropertyAccessors for example.