XML : Split XML using a Xpath Java

I have following XML string.

  <Engineers>      <Engineer>          <Name>JOHN</Name>          <Position>STL</Position>          <Team>SS</Team>      </Engineer>      <Engineer>          <Name>UDAY</Name>          <Position>TL</Position>          <Team>SG</Team>      </Engineer>      <Engineer>          <Name>INDRA</Name>          <Position>Director</Position>          <Team>PP</Team>      </Engineer>  </Engineers>    

I need to split this xml into smaller xml strings when Xpath is given as Engineers/Enginner.

Smaller xml strings are as follows

      <Engineers>          <Engineer>              <Name>INDRA</Name>              <Position>Director</Position>              <Team>PP</Team>          </Engineer>      </Engineers>        <Engineers>          <Engineer>              <Name>JOHN</Name>              <Position>STL</Position>              <Team>SS</Team>          </Engineer>      </Engineers>    

How can I do this using Java document builder and XpathFactory?