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POconvert std::vector<T> into Dataset^
 

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  1. POconvert std::vector<T> into Dataset^
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    <p>I have a vector of c++ structs, and I need to put this into a managed, typed dataset.</p> <pre><code>std::vector&lt;Record*&gt; record_collection; class Record{ public: Record(){}; virtual ~Record(){}; virtual void serialize(std::ostream&amp; dest){ dest &lt;&lt; "Record" &lt;&lt; std::endl; } }; </code></pre> <p>Record* is a base class - I need to handle the derived class. A typical example is </p> <pre><code>class TestRecord:public Record{ public: TestRecord(){}; ~TestRecord(){}; std::string t_str; int t_int; double t_double; void serialize(std::ostream&amp; dest){ dest &lt;&lt; t_int &lt;&lt; ',' &lt;&lt; t_double &lt;&lt; ',' &lt;&lt; t_str &lt;&lt; ',' &lt;&lt; std::endl; }; }; </code></pre> <p>Essentially, I need to reproduce the serialize method, except that I need to make DataColumns for <code>t_str</code>, <code>t_int</code>, and <code>t_double</code>, type the columns appropriately, and then put the values in them. </p> <p>I can edit anything as required at this point, but I need to set up the pattern such that anything that implements record can have its data members can be serialized into a managed dataset with typed columns. </p> <p>Can anyone advise on a pattern, or a suggestion, that would help? I could do it with inspection on a tuple if this were Python, but in c++11 a tuple needs to be of predefined type.</p> <p>The problem here is that I may not compile record or TestRecord with /cli, in which case I could pass in the datatable to the record and let it populate it itself - so I'm looking for a better solution than the ones I have:</p> <p>a) Write a managed wrapper for <em>every</em> derived class b) Do type inspection.</p> <p>Is there a pattern I've missed?</p> <p>Thanks, Melanie</p>
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    1. COIs `serialize` `virtual`? How many child classes? Is the number fixed and never changing? Can you change the child classes? Can you change the `Record` class? Give an example concrete interface for `Record`. You say you need to reproduce `serialize` with `DataColumn`s, but you also say you need `Dataset^` -- which do you actually need?
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      1. USYakk - Adam Nevraumont
    2. COGood questions. Serialize is virtual, an unknown number of classes inherit record, and for each value of unknown type I need a datacolumn of appropriate type, put together in a dataset. I'll edit the question.
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      1. USMelanie
 

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