You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
83 lines
2.5 KiB
83 lines
2.5 KiB
/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License. */
|
|
|
|
|
|
#pragma once
|
|
|
|
#include <map>
|
|
#include <string>
|
|
|
|
#include "Util.h"
|
|
|
|
namespace paddle {
|
|
|
|
/**
|
|
* This class is used to keep a set of class types. It can register a
|
|
* class by a type name and create an instance of a class by type.
|
|
* Example:
|
|
* // Declare the registrar
|
|
* ClassRegistrar<Layer, LayerConfig> registar_;
|
|
*
|
|
* // Register a class using its constructor
|
|
* registrar_.registerClass<ConvLayer>("conv");
|
|
*
|
|
* // Register a class using a creation function
|
|
* registrar_.registerClass("pool", [](LayerConfig& config){
|
|
* return PoolLayer::create(config);
|
|
* });
|
|
*
|
|
* // create a class instance by type name
|
|
* Layer* layer = registrar_.createByType("conv", config);
|
|
*/
|
|
template <class BaseClass, typename... CreateArgs>
|
|
class ClassRegistrar {
|
|
public:
|
|
typedef std::function<BaseClass*(CreateArgs...)> ClassCreator;
|
|
|
|
// Register a class using a creation function.
|
|
// The creation function's arguments are CreateArgs
|
|
void registerClass(const std::string& type, ClassCreator creator) {
|
|
CHECK(creatorMap_.count(type) == 0) << "Duplicated class type: " << type;
|
|
creatorMap_[type] = creator;
|
|
}
|
|
|
|
// Register a class using its constructor
|
|
// The constructor's arguments are CreateArgs
|
|
template <class ClassType>
|
|
void registerClass(const std::string& type) {
|
|
registerClass(type,
|
|
[](CreateArgs... args) { return new ClassType(args...); });
|
|
}
|
|
|
|
// Create a class instance of type @type using args
|
|
BaseClass* createByType(const std::string& type, CreateArgs... args) {
|
|
ClassCreator creator;
|
|
CHECK(mapGet(type, creatorMap_, &creator))
|
|
<< "Unknown class type: " << type;
|
|
return creator(args...);
|
|
}
|
|
|
|
template <typename T>
|
|
inline void forEachType(T callback) {
|
|
for (auto it = creatorMap_.begin(); it != creatorMap_.end(); ++it) {
|
|
callback(it->first);
|
|
}
|
|
}
|
|
|
|
protected:
|
|
std::map<std::string, ClassCreator> creatorMap_;
|
|
};
|
|
|
|
} // namespace paddle
|