BESDapError.cc

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00001 // BESDapError.cc
00002 
00003 // This file is part of bes, A C++ back-end server implementation framework
00004 // for the OPeNDAP Data Access Protocol.
00005 
00006 // Copyright (c) 2004-2009 University Corporation for Atmospheric Research
00007 // Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
00008 //
00009 // This library is free software; you can redistribute it and/or
00010 // modify it under the terms of the GNU Lesser General Public
00011 // License as published by the Free Software Foundation; either
00012 // version 2.1 of the License, or (at your option) any later version.
00013 //
00014 // This library is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017 // Lesser General Public License for more details.
00018 //
00019 // You should have received a copy of the GNU Lesser General Public
00020 // License along with this library; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 //
00023 // You can contact University Corporation for Atmospheric Research at
00024 // 3080 Center Green Drive, Boulder, CO 80301
00025 
00026 // (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
00027 // Please read the full copyright statement in the file COPYRIGHT_UCAR.
00028 //
00029 // Authors:
00030 //      pwest       Patrick West <pwest@ucar.edu>
00031 //      jgarcia     Jose Garcia <jgarcia@ucar.edu>
00032 
00033 #include <sstream>
00034 
00035 using std::ostringstream;
00036 
00037 #include "BESDapError.h"
00038 #include "BESContextManager.h"
00039 #include "BESDapErrorInfo.h"
00040 
00063 int
00064 BESDapError::convert_error_code( int error_code, int current_error_type )
00065 {
00066     if( current_error_type == BES_INTERNAL_FATAL_ERROR )
00067         return current_error_type ;
00068     switch( error_code )
00069     {
00070         case undefined_error:
00071         case unknown_error:
00072         {
00073             return BES_INTERNAL_ERROR ;
00074             break ;
00075         }
00076         case internal_error:
00077         {
00078             return BES_INTERNAL_FATAL_ERROR ;
00079             break ;
00080         }
00081         case no_such_file:
00082         {
00083             return BES_NOT_FOUND_ERROR ;
00084             break ;
00085         }
00086         case no_such_variable:
00087         case malformed_expr:
00088         {
00089             return BES_SYNTAX_USER_ERROR ;
00090             break ;
00091         }
00092         case no_authorization:
00093         case cannot_read_file:
00094         case dummy_message:
00095         {
00096             return BES_FORBIDDEN_ERROR ;
00097             break ;
00098         }
00099         default:
00100         {
00101             return BES_INTERNAL_ERROR ;
00102             break ;
00103         }
00104     }
00105     return BES_INTERNAL_ERROR ;
00106 }
00107 
00117 int
00118 BESDapError::handleException( BESError &e, BESDataHandlerInterface &dhi )
00119 {
00120     // If we are handling errors in a dap2 context, then create a
00121     // DapErrorInfo object to transmit/print the error as a dap2
00122     // response.
00123     bool found = false ;
00124     // I changed 'dap_format' to 'errors' in the following line. jhrg 10/6/08
00125     string context = BESContextManager::TheManager()->get_context( "errors", found ) ;
00126     if( context == "dap2" )
00127     {
00128         ErrorCode ec = unknown_error ;
00129         BESDapError *de = dynamic_cast<BESDapError*>( &e);
00130         if( de )
00131         {
00132             ec = de->get_error_code() ;
00133         }
00134         e.set_error_type( convert_error_code( ec, e.get_error_type() ) ) ;
00135         dhi.error_info = new BESDapErrorInfo( ec, e.get_message() ) ;
00136 
00137         return e.get_error_type() ;
00138     }
00139     else
00140     {
00141         // If we are not in a dap2 context and the exception is a dap
00142         // handler exception, then convert the error message to include the
00143         // error code. If it is or is not a dap exception, we simply return
00144         // that the exception was not handled.
00145         BESDapError *de = dynamic_cast<BESDapError*>( &e);
00146         if( de )
00147         {
00148             ostringstream s;
00149             s << "libdap exception building response"
00150                 << ": error_code = " << de->get_error_code()
00151                 << ": " << de->get_message() ;
00152             e.set_message( s.str() ) ;
00153             e.set_error_type( convert_error_code( de->get_error_code(),
00154                                                   e.get_error_type() ) ) ;
00155         }
00156     }
00157     return 0 ;
00158 }
00159 

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