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| <title>Serialization - Derivation from an Existing Archive</title> |
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| <h3><a href="../../../index.htm"><img height="86" width="277" alt="C++ Boost" src="../../../boost.png" border="0"></a></h3> |
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| <h1 align="center">Serialization</h1> |
| <h2 align="center">A Simple Logging Archive Class</h2> |
| </td> |
| </tr> |
| </table> |
| <hr> |
| The purpose of this example help clarify the usage of the |
| <a href="archives.html"><strong>Archive Concept</strong></a> |
| so that one can implement his own archive classes. |
| <a href="../example/simple_log_archive.hpp" target="simple_archive_hpp"> |
| <code>simple_log_archive.hpp</code></a> implements a simple but useful |
| archive class. This class can be used to send any serializable types |
| on an output text stream in a readable format. Usage of this facility |
| is trivially easy: |
| |
| <pre><code> |
| #include "simple_log_archive.hpp" |
| ... |
| // display the complete schedule |
| simple_log_archive log(std::cout); |
| log << schedule; |
| </code></pre> |
| |
| and it produces the following output |
| |
| <pre><code> |
| schedule |
| count 6 |
| item |
| first |
| driver bob |
| hour 6 |
| minute 24 |
| second -> |
| stops |
| count 3 |
| item -> |
| latitude |
| degrees 34 |
| minutes 135 |
| seconds 52.56 |
| longitude |
| degrees 134 |
| minutes 22 |
| seconds 78.3 |
| ... |
| </code></pre> |
| |
| The complete example is <a href="../example/demo_simple_log.cpp" target="demo_simple_log_cpp"> |
| <code>demo_simple_log.cpp</code></a>. Look at |
| <a href="archive_reference.html#trivial">Trivial Archive</a> to get a |
| better understanding of how this works. |
| |
| Also, note the following: |
| <ul> |
| <li>Only 160 lines of code. |
| <li>Header only - linking with the serialization library not required. |
| <li>Displays ALL <a href="serialization.html"><strong>Serializable</strong></a> types. |
| <li>Lacks some features. |
| <ul> |
| <li>it will not display the data from the derived type given the pointer to a |
| polymorphic base class. That is, only displays the information of the base class. |
| To add that see the next example. |
| <li>doesn't display information serialized as binary data |
| </ul> |
| </ul> |
| |
| <hr> |
| <p><i>© Copyright <a href="http://www.rrsd.com">Robert Ramey</a> 2002-2010. |
| Distributed under the Boost Software License, Version 1.0. (See |
| accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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