create_attribute_string_integer.cpp

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/*
 *  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/H5Attribute.hpp>
#include <highfive/H5File.hpp>
#include <highfive/H5DataSet.hpp>
#include <highfive/H5DataSpace.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
 
        // let's 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
}