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POC++ Class Serialization
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  1. POC++ Class Serialization
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    copied!<p>I quite recently learned about the C++ classes friend keyword and the uses in serialization and now I need some help in getting it to work.</p> <p>I have no problem serializing my class to a file, it's working great, however i'm having a hard time trying to read this file into a vector container. I'm sure I need a loop in my code that reads line by line, but since the class has different types I guess I can't use std::getline() and also maybe that approach wouldn't use the istream method i implemented? A sample output file would be:</p> <pre><code>Person 1 2009 1 Person 2 2001 0 </code></pre> <p>My code:</p> <pre><code>class SalesPeople { friend ostream &amp;operator&lt;&lt;(ostream &amp;stream, SalesPeople salesppl); friend istream &amp;operator&gt;&gt;(istream &amp;stream, SalesPeople &amp;salesppl); private: string fullname; int employeeID; int startYear; bool status; }; ostream &amp;operator&lt;&lt;(ostream &amp;stream, SalesPeople salesppl) { stream &lt;&lt; salesppl.fullname &lt;&lt; endl; stream &lt;&lt; salesppl.startYear &lt;&lt; endl; stream &lt;&lt; salesppl.status &lt;&lt; endl; stream &lt;&lt; endl; return stream; } istream &amp;operator&gt;&gt;(istream &amp;stream, SalesPeople &amp;salesppl) { stream &gt;&gt; salesppl.fullname; stream &gt;&gt; salesppl.startYear; stream &gt;&gt; salesppl.status; // not sure how to read that empty extra line here ? return stream; } // need some help here trying to read the file into a vector&lt;SalesPeople&gt; SalesPeople employee; vector&lt;SalesPeople&gt; employees; ifstream read("employees.dat", ios::in); if (!read) { cerr &lt;&lt; "Unable to open input file.\n"; return 1; } // i am pretty sure i need a loop here and should go line by line // to read all the records, however the class has different // types and im not sure how to use the istream method here. read &gt;&gt; employee; employees.push_back(employee); </code></pre> <p>By the way, I know that the Boost library has a great serialization class, however I'm trying to learn how serialization would work using the STL library for now. Thanks a lot in advance for any help that you can give me and for getting me in the right track!</p>
 

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