ab60ed8813
Also replace derived types (map_type, collection_type, etc.). As we'll change data_type's definition, this reduces the number of places that need to be modified later, and is more readable.
74 lines
2.1 KiB
C++
74 lines
2.1 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 Cloudius Systems
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*
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* Copyright 2014 Cloudius Systems
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*/
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#ifndef CQL3_FUNCTIONS_NATIVE_AGGREGATE_FUNCTION_HH
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#define CQL3_FUNCTIONS_NATIVE_AGGREGATE_FUNCTION_HH
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#include "types.hh"
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#include "native_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>AggregateFunction</code> native classes.
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*/
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class native_aggregate_function : public native_function, public aggregate_function {
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protected:
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native_aggregate_function(sstring name, data_type return_type,
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std::vector<data_type> arg_types)
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: native_function(std::move(name), std::move(return_type), std::move(arg_types)) {
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}
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public:
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virtual bool is_aggregate() override final {
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return true;
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}
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};
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template <class Aggregate>
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class native_aggregate_function_using : public native_aggregate_function {
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public:
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native_aggregate_function_using(sstring name, data_type type)
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: native_aggregate_function(std::move(name), type, {}) {
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}
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virtual std::unique_ptr<aggregate> new_aggregate() override {
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return std::make_unique<Aggregate>();
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}
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};
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template <class Aggregate>
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shared_ptr<native_aggregate_function>
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make_native_aggregate_function_using(sstring name, data_type type) {
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return ::make_shared<native_aggregate_function_using<Aggregate>>(name, type);
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}
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}
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}
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#endif
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