question: public synchronized void registerMapping ( final QName qname , final String javaClassName ) { if ( javaToQName == null ) { javaToQName = Collections . synchronizedMap ( new HashMap < String , QName > ( ) ) ; } if ( qnameToJava == null ) { qnameToJava = Collections . synchronizedMap ( new HashMap < QName , String > ( ) ) ; } javaToQName . put ( javaClassName , qname ) ; qnameToJava . put ( qname , javaClassName ) ; }
target:  Registers the mapping of the Java class name to the QName