protected void startPrefixMapping ( String prefix , String namespace ) throws SAXException { if ( getContentHandler ( ) != null ) { if ( prefix == null ) { prefix = "" ; } if ( ! StringUtils . hasLength ( namespace ) ) { return ; } if ( ! namespace . equals ( namespaces . get ( prefix ) ) ) { getContentHandler ( ) . startPrefixMapping ( prefix , namespace ) ; namespaces . put ( prefix , namespace ) ; } } }
Starts the prefix mapping for the given prefix .