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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MOJO_PUBLIC_CPP_BINDINGS_MAP_TRAITS_PROTOBUF_H_
#define MOJO_PUBLIC_CPP_BINDINGS_MAP_TRAITS_PROTOBUF_H_
#include <map>
#include <utility>
#include "base/logging.h"
#include "mojo/public/cpp/bindings/map_traits.h"
#include "third_party/protobuf/src/google/protobuf/map.h"
namespace mojo {
template <typename K, typename V>
struct MapTraits<::google::protobuf::Map<K, V>> {
using Key = K;
using Value = V;
using Iterator = typename ::google::protobuf::Map<K, V>::iterator;
using ConstIterator = typename ::google::protobuf::Map<K, V>::const_iterator;
static bool IsNull(const ::google::protobuf::Map<K, V>& input) {
// Protobuf Maps are always converted to a non-null mojom map.
return false;
}
static void SetToNull(::google::protobuf::Map<K, V>* output) {
// Protobuf Maps don't have a null state. Set it to empty instead.
output->clear();
}
static size_t GetSize(const ::google::protobuf::Map<K, V>& input) {
return input.size();
}
static ConstIterator GetBegin(const ::google::protobuf::Map<K, V>& input) {
return input.begin();
}
static Iterator GetBegin(::google::protobuf::Map<K, V>& input) {
return input.begin();
}
static void AdvanceIterator(ConstIterator& iterator) { iterator++; }
static void AdvanceIterator(Iterator& iterator) { iterator++; }
static const K& GetKey(Iterator& iterator) { return iterator->first; }
static const K& GetKey(ConstIterator& iterator) { return iterator->first; }
static V& GetValue(Iterator& iterator) { return iterator->second; }
static const V& GetValue(ConstIterator& iterator) { return iterator->second; }
template <typename MaybeConstKeyType, typename MaybeConstValueType>
static bool Insert(::google::protobuf::Map<K, V>& input,
MaybeConstKeyType&& key,
MaybeConstValueType&& value) {
input.insert({std::forward<MaybeConstKeyType>(key),
std::forward<MaybeConstValueType>(value)});
return true;
}
static void SetToEmpty(::google::protobuf::Map<K, V>* output) {
output->clear();
}
};
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_MAP_TRAITS_PROTOBUF_H_
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