question: public int parseToNode ( Source source , SourceLocator locator , XPathContext xctxt ) throws TransformerException { try { Object xowner = xctxt . getOwnerObject ( ) ; DTM dtm ; if ( null != xowner && xowner instanceof org . apache . xml . dtm . DTMWSFilter ) { dtm = xctxt . getDTM ( source , false , ( org . apache . xml . dtm . DTMWSFilter ) xowner , false , true ) ; } else { dtm = xctxt . getDTM ( source , false , null , false , true ) ; } return dtm . getDocument ( ) ; } catch ( Exception e ) { throw new TransformerException ( e . getMessage ( ) , locator , e ) ; } }
target:  Try to create a DOM source tree from the input source.