Method getFieldByIndex

matlab/src/cpp/arrow/matlab/array/proxy/struct_array.cc:92–119

}

void StructArray::getFieldByIndex(libmexclass::proxy::method::Context& context) {
  namespace mda = ::matlab::data;
  using namespace libmexclass::proxy;

  mda::StructArray args = context.inputs[0];
  const mda::TypedArray<int32_t> index_mda = args[0]["Index"];
  const auto matlab_index = int32_t(index_mda[0]);

  auto struct_array = std::static_pointer_cast<arrow::StructArray>(array);

  const auto num_fields = struct_array->type()->num_fields();

  // Validate there is at least 1 field
  MATLAB_ERROR_IF_NOT_OK_WITH_CONTEXT(index::validateNonEmptyContainer(num_fields),
                                      context, error::INDEX_EMPTY_CONTAINER);

  // Validate the matlab index provided is within the range [1, num_fields]
  MATLAB_ERROR_IF_NOT_OK_WITH_CONTEXT(index::validateInRange(matlab_index, num_fields),
                                      context, error::INDEX_OUT_OF_RANGE);

  // Note: MATLAB uses 1-based indexing, so subtract 1.
  const int32_t index = matlab_index - 1;

  auto field_array = struct_array->field(index);
  MATLAB_ASSIGN_OR_ERROR_WITH_CONTEXT(context.outputs[0],
                                      arrow::matlab::proxy::wrap_and_manage(field_array),
                                      context, error::UNKNOWN_PROXY_FOR_ARRAY_TYPE);
}

void StructArray::getFieldByName(libmexclass::proxy::method::Context& context) {
  namespace mda = ::matlab::data;