protected Enumeration getContextAttributeNames ( ) { if ( _attributes . size ( ) == 0 ) return getHttpContext ( ) . getAttributeNames ( ) ; HashSet set = new HashSet ( _attributes . keySet ( ) ) ; Enumeration e = getHttpContext ( ) . getAttributeNames ( ) ; while ( e . hasMoreElements ( ) ) set . add ( e . nextElement ( ) ) ; return Collections . enumeration ( set ) ; }
Get context attribute names . Combines ServletHandler and HttpContext attributes .