| 1 | /*************************************************************************** |
| 2 | * Copyright (C) 2006 by Gerd v. Egidy * |
| 3 | * gve@intra2net.com * |
| 4 | * * |
| 5 | * This library is free software; you can redistribute it and/or modify * |
| 6 | * it under the terms of the GNU Lesser General Public License version * |
| 7 | * 2.1 as published by the Free Software Foundation. * |
| 8 | * * |
| 9 | * This library is distributed in the hope that it will be useful, * |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 12 | * GNU Lesser General Public License for more details. * |
| 13 | * * |
| 14 | * You should have received a copy of the GNU Lesser General Public * |
| 15 | * License along with this program; if not, write to the * |
| 16 | * Free Software Foundation, Inc., * |
| 17 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
| 18 | ***************************************************************************/ |
| 19 | #ifndef __LIBT2N_CONTAINER |
| 20 | #define __LIBT2N_CONTAINER |
| 21 | |
| 22 | #include "command.hxx" |
| 23 | #include "t2n_exception.hxx" |
| 24 | |
| 25 | #include <iostream> |
| 26 | |
| 27 | namespace libt2n |
| 28 | { |
| 29 | |
| 30 | /** @brief contains the result (return value or exception) of a executed command |
| 31 | */ |
| 32 | class result_container |
| 33 | { |
| 34 | private: |
| 35 | enum result_type_t { regular, exception } result_type; |
| 36 | |
| 37 | result *res; |
| 38 | t2n_exception *ex; |
| 39 | |
| 40 | friend class boost::serialization::access; |
| 41 | // When the class Archive corresponds to an output archive, the |
| 42 | // & operator is defined similar to <<. Likewise, when the class Archive |
| 43 | // is a type of input archive the & operator is defined similar to >>. |
| 44 | template<class Archive> |
| 45 | void serialize(Archive & ar, const unsigned int version) |
| 46 | { |
| 47 | ar & BOOST_SERIALIZATION_NVP(result_type); |
| 48 | ar & BOOST_SERIALIZATION_NVP(res); |
| 49 | ar & BOOST_SERIALIZATION_NVP(ex); |
| 50 | } |
| 51 | |
| 52 | public: |
| 53 | result_container() |
| 54 | { res=0; ex=0; } |
| 55 | |
| 56 | result_container(result *_res) |
| 57 | { set_result(_res); } |
| 58 | result_container(t2n_exception *_ex) |
| 59 | { set_exception(_ex); } |
| 60 | |
| 61 | void set_result(result *_res) |
| 62 | { res=_res; ex=0; result_type=regular; } |
| 63 | void set_exception(t2n_exception *_ex) |
| 64 | { res=0; ex=_ex; result_type=exception; } |
| 65 | |
| 66 | /** @brief returns the result or throw the carried exception. |
| 67 | ATTENTION: the result object is deleted in the destructor |
| 68 | */ |
| 69 | result* get_result(void) |
| 70 | { |
| 71 | if (result_type==exception) |
| 72 | ex->do_throw(); |
| 73 | return res; |
| 74 | } |
| 75 | |
| 76 | /// deletes the carried result or exception objects |
| 77 | ~result_container() |
| 78 | { |
| 79 | if (res) |
| 80 | delete res; |
| 81 | if (ex) |
| 82 | delete ex; |
| 83 | } |
| 84 | }; |
| 85 | |
| 86 | /** @brief contains a command |
| 87 | */ |
| 88 | class command_container |
| 89 | { |
| 90 | private: |
| 91 | command *cmd; |
| 92 | |
| 93 | friend class boost::serialization::access; |
| 94 | template<class Archive> |
| 95 | void serialize(Archive & ar, const unsigned int version) |
| 96 | { |
| 97 | std::cerr << "ser: command_container" << std::endl; |
| 98 | ar & BOOST_SERIALIZATION_NVP(cmd); |
| 99 | } |
| 100 | |
| 101 | public: |
| 102 | command_container() |
| 103 | { cmd=0; } |
| 104 | command_container(command *_cmd) |
| 105 | { cmd=_cmd; } |
| 106 | |
| 107 | /// return the contained command |
| 108 | command* get_command() |
| 109 | { return cmd; } |
| 110 | |
| 111 | ~command_container() |
| 112 | { |
| 113 | if (cmd) |
| 114 | delete cmd; |
| 115 | } |
| 116 | }; |
| 117 | |
| 118 | } // namespace libt2n |
| 119 | |
| 120 | BOOST_CLASS_TRACKING(libt2n::result_container, boost::serialization::track_never) |
| 121 | BOOST_CLASS_TRACKING(libt2n::command_container, boost::serialization::track_never) |
| 122 | |
| 123 | #endif |
| 124 | |