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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef GOOGLE_PROTOBUF_MAP_FIELD_LITE_H__
#define GOOGLE_PROTOBUF_MAP_FIELD_LITE_H__
#include <google/protobuf/map.h>
#include <google/protobuf/map_entry_lite.h>
#include <google/protobuf/wire_format_lite.h>
namespace google {
namespace protobuf {
namespace internal {
// This class provides access to map field using generated api. It is used for
// internal generated message implentation only. Users should never use this
// directly.
template <typename Derived, typename Key, typename T,
WireFormatLite::FieldType key_wire_type,
WireFormatLite::FieldType value_wire_type, int default_enum_value = 0>
class MapFieldLite {
// Define message type for internal repeated field.
typedef Derived EntryType;
public:
typedef Map<Key, T> MapType;
typedef EntryType EntryTypeTrait;
MapFieldLite() : arena_(NULL) { SetDefaultEnumValue(); }
explicit MapFieldLite(Arena* arena) : arena_(arena), map_(arena) {
SetDefaultEnumValue();
}
// Accessors
const Map<Key, T>& GetMap() const { return map_; }
Map<Key, T>* MutableMap() { return &map_; }
// Convenient methods for generated message implementation.
int size() const { return static_cast<int>(map_.size()); }
void Clear() { return map_.clear(); }
void MergeFrom(const MapFieldLite& other) {
for (typename Map<Key, T>::const_iterator it = other.map_.begin();
it != other.map_.end(); ++it) {
map_[it->first] = it->second;
}
}
void Swap(MapFieldLite* other) { map_.swap(other->map_); }
// Set default enum value only for proto2 map field whose value is enum type.
void SetDefaultEnumValue() {
MutableMap()->SetDefaultEnumValue(default_enum_value);
}
// Used in the implementation of parsing. Caller should take the ownership iff
// arena_ is NULL.
EntryType* NewEntry() const {
if (arena_ == NULL) {
return new EntryType();
} else {
return Arena::CreateMessage<EntryType>(arena_);
}
}
// Used in the implementation of serializing enum value type. Caller should
// take the ownership iff arena_ is NULL.
EntryType* NewEnumEntryWrapper(const Key& key, const T t) const {
return EntryType::EnumWrap(key, t, arena_);
}
// Used in the implementation of serializing other value types. Caller should
// take the ownership iff arena_ is NULL.
EntryType* NewEntryWrapper(const Key& key, const T& t) const {
return EntryType::Wrap(key, t, arena_);
}
private:
typedef void DestructorSkippable_;
Arena* arena_;
Map<Key, T> map_;
friend class ::google::protobuf::Arena;
};
// True if IsInitialized() is true for value field in all elements of t. T is
// expected to be message. It's useful to have this helper here to keep the
// protobuf compiler from ever having to emit loops in IsInitialized() methods.
// We want the C++ compiler to inline this or not as it sees fit.
template <typename Key, typename T>
bool AllAreInitialized(const Map<Key, T>& t) {
for (typename Map<Key, T>::const_iterator it = t.begin(); it != t.end();
++it) {
if (!it->second.IsInitialized()) return false;
}
return true;
}
template <typename MEntry>
struct MapEntryToMapField : MapEntryToMapField<typename MEntry::SuperType> {};
template <typename T, typename Key, typename Value,
WireFormatLite::FieldType kKeyFieldType,
WireFormatLite::FieldType kValueFieldType, int default_enum_value>
struct MapEntryToMapField<MapEntryLite<T, Key, Value, kKeyFieldType,
kValueFieldType, default_enum_value> > {
typedef MapFieldLite<MapEntryLite<T, Key, Value, kKeyFieldType,
kValueFieldType, default_enum_value>,
Key, Value, kKeyFieldType, kValueFieldType,
default_enum_value>
MapFieldType;
};
} // namespace internal
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_MAP_FIELD_LITE_H__
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