38a54df863
People keep tripping over the old copyrights and copy-pasting them to new files. Search and replace "Cloudius Systems" with "ScyllaDB". Message-Id: <1460013664-25966-1-git-send-email-penberg@scylladb.com>
99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Modified by ScyllaDB
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*
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* Copyright (C) 2014 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "native_function.hh"
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#include "scalar_function.hh"
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#include "core/shared_ptr.hh"
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namespace cql3 {
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namespace functions {
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/**
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* Base class for the <code>ScalarFunction</code> native classes.
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*/
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class native_scalar_function : public native_function, public scalar_function {
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protected:
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native_scalar_function(sstring name, data_type return_type, std::vector<data_type> args_type)
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: native_function(std::move(name), std::move(return_type), std::move(args_type)) {
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}
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public:
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virtual bool is_aggregate() override {
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return false;
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}
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};
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template <typename Func, bool Pure>
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class native_scalar_function_for : public native_scalar_function {
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Func _func;
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public:
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native_scalar_function_for(sstring name,
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data_type return_type,
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const std::vector<data_type> arg_types,
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Func&& func)
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: native_scalar_function(std::move(name), std::move(return_type), std::move(arg_types))
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, _func(std::forward<Func>(func)) {
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}
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virtual bool is_pure() override {
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return Pure;
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}
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virtual bytes_opt execute(cql_serialization_format sf, const std::vector<bytes_opt>& parameters) override {
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return _func(sf, parameters);
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}
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};
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template <bool Pure, typename Func>
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shared_ptr<function>
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make_native_scalar_function(sstring name,
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data_type return_type,
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std::vector<data_type> args_type,
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Func&& func) {
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return ::make_shared<native_scalar_function_for<Func, Pure>>(std::move(name),
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std::move(return_type),
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std::move(args_type),
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std::forward<Func>(func));
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}
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}
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}
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