// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements. See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership. The ASF licenses this file

// to you 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 <gen_cpp/Types_types.h>

#include <functional>

#include <memory>

#include <string>

#include <unordered_map>

#include "common/status.h"

namespace doris {

class ObjectPool;

class TableFunction;

class TableFunctionFactory {

public:

TableFunctionFactory() = delete;

static Status get_fn(const TFunction& t_fn, ObjectPool* pool, TableFunction** fn,

int be_version);

const static std::unordered_map<std::string, std::function<std::unique_ptr<TableFunction>()>>

_function_map;

/// @TEMPORARY: for be_exec_version=8. replace function to old version.

const static std::unordered_map<std::string, std::string> _function_to_replace;

const static int NEWEST_VERSION_EXPLODE_MULTI_PARAM = 8;

private:

/// @TEMPORARY: for be_exec_version=8

static void temporary_function_update(int fe_version_now, std::string& name) {

// replace if fe is old version.

if (fe_version_now < NEWEST_VERSION_EXPLODE_MULTI_PARAM &&

_function_to_replace.find(name) != _function_to_replace.end()) {

name = _function_to_replace.at(name);

}

}

};

} // namespace doris