create_attribute_string_integer.cpp

/*
 *  Copyright (c), 2017, Adrien Devresse
 *
 *  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)
 *
 */
#include <iostream>
#include <string>
#include <vector>

#include <highfive/H5File.hpp>
#include <highfive/H5DataSpace.hpp>
#include <highfive/H5DataSet.hpp>
#include <highfive/H5Attribute.hpp>


using namespace HighFive;

const std::string FILE_NAME("create_attribute.h5");
const std::string DATASET_NAME("my_dataset");

const std::string ATTRIBUTE_NAME_NOTE("note");
const std::string ATTRIBUTE_NAME_VERSION("version_string");


// create a dataset from a vector of string
// read it back and print it
int main (void)
{

    try
    {
        // Create a new file using the default property lists.
        File file(FILE_NAME, File::ReadWrite | File::Create | File::Truncate);

        // Create a dummy dataset of one single integer
        DataSet dataset = file.createDataSet(DATASET_NAME,  DataSpace(1), AtomicType<int>());

        // Now let's add a attribute on this dataset
        // This attribute will be named "note"
        // and have the following content
        std::string string_list("very important Dataset !");

        Attribute a = dataset.createAttribute<std::string>(ATTRIBUTE_NAME_NOTE, DataSpace::From(string_list));
        a.write(string_list);


        // We also add a "version" attribute
        // that will be an array 1x2 of integer
        std::vector<int> version;
        version.push_back(1);
        version.push_back(0); // version 1.0

        Attribute v = dataset.createAttribute<int>(ATTRIBUTE_NAME_VERSION, DataSpace::From(version));
        v.write(version);

        // Ok all attributes are now written


        // lets list the keys of all attributes now
        std::vector<std::string> all_attributes_keys = dataset.listAttributeNames();
        for(std::vector<std::string>::const_iterator it = all_attributes_keys.begin(); it < all_attributes_keys.end(); ++it){
            std::cout << "attribute: " << *it << std::endl;
        }

    }catch(Exception & err){
        // catch and print any HDF5 error
        std::cerr << err.what() << std::endl;
    }

    return 0;  // successfully terminated
}