martin-g commented on code in PR #3266:
URL: https://github.com/apache/avro/pull/3266#discussion_r1967624667
##########
lang/c++/impl/CustomAttributes.cc:
##########
@@ -16,26 +16,63 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-#include "CustomAttributes.hh"
-#include "Exception.hh"
+
+#if defined(__clang__)
+// Even though CustomAttributes::ValueMode::STRING is deprecated, we still
have to
+// handle/implement it.
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
#include <map>
#include <memory>
+#include "CustomAttributes.hh"
+#include "Exception.hh"
+
+#include "json/JsonDom.hh"
+
namespace avro {
+CustomAttributes::CustomAttributes(ValueMode valueMode) {
+ switch (valueMode) {
+ case ValueMode::STRING:
+ case ValueMode::JSON:
+ valueMode_ = valueMode;
+ break;
+ default:
+ throw Exception("invalid ValueMode: " +
std::to_string(static_cast<int>(valueMode)));
+ }
+}
+
std::optional<std::string> CustomAttributes::getAttribute(const std::string
&name) const {
- std::optional<std::string> result;
- std::map<std::string, std::string>::const_iterator iter =
- attributes_.find(name);
+ auto iter = attributes_.find(name);
if (iter == attributes_.end()) {
- return result;
+ return {};
}
- result = iter->second;
- return result;
+ return iter->second;
}
void CustomAttributes::addAttribute(const std::string &name,
const std::string &value) {
+ // Validate the incoming value.
+ //
+ // NOTE: This is a bit annoying that we accept the data as a string
instead of
+ // as an Entity. That means the compiler must convert the value to a
string only
+ // for this method to convert it back. But we can't directly refer to the
+ // json::Entity type in the signatures for this class (and thus cannot
accept
+ // that type directly as a parameter) because then it would need to be
included
+ // from a header file: CustomAttributes.hh. But the json header files are
not
+ // part of the Avro distribution (intentionally), so CustomAttributes.hh
cannot
+ // #include any of the json header files.
+ const std::string &jsonVal = (valueMode_ == ValueMode::STRING)
+ ? std::move("\"" + value + "\"")
+ : value;
+ try {
Review Comment:
We should not produce invalid .avro files! It is better to fail early with a
good error message!
I am not a C++ developer so I could not say whether the suggested code is
good or not.
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