| /* |
| * 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. |
| */ |
| |
| #ifndef THETA_UNION_HPP_ |
| #define THETA_UNION_HPP_ |
| |
| #include "serde.hpp" |
| #include "theta_sketch.hpp" |
| #include "theta_union_base.hpp" |
| |
| namespace datasketches { |
| |
| template<typename Allocator = std::allocator<uint64_t>> |
| class theta_union_alloc { |
| public: |
| using Entry = uint64_t; |
| using ExtractKey = trivial_extract_key; |
| using Sketch = theta_sketch_alloc<Allocator>; |
| using CompactSketch = compact_theta_sketch_alloc<Allocator>; |
| using resize_factor = theta_constants::resize_factor; |
| |
| struct nop_policy { |
| void operator()(uint64_t internal_entry, uint64_t incoming_entry) const { |
| unused(internal_entry); |
| unused(incoming_entry); |
| } |
| }; |
| using State = theta_union_base<Entry, ExtractKey, nop_policy, Sketch, CompactSketch, Allocator>; |
| |
| // No constructor here. Use builder instead. |
| class builder; |
| |
| /** |
| * This method is to update the union with a given sketch |
| * @param sketch to update the union with |
| */ |
| template<typename FwdSketch> |
| void update(FwdSketch&& sketch); |
| |
| /** |
| * This method produces a copy of the current state of the union as a compact sketch. |
| * @param ordered optional flag to specify if ordered sketch should be produced |
| * @return the result of the union |
| */ |
| CompactSketch get_result(bool ordered = true) const; |
| |
| private: |
| State state_; |
| |
| // for builder |
| theta_union_alloc(uint8_t lg_cur_size, uint8_t lg_nom_size, resize_factor rf, uint64_t theta, uint64_t seed, const Allocator& allocator); |
| }; |
| |
| template<typename A> |
| class theta_union_alloc<A>::builder: public theta_base_builder<builder, A> { |
| public: |
| builder(const A& allocator = A()); |
| |
| /** |
| * This is to create an instance of the union with predefined parameters. |
| * @return an instance of the union |
| */ |
| theta_union_alloc<A> build() const; |
| }; |
| |
| // alias with default allocator for convenience |
| using theta_union = theta_union_alloc<std::allocator<uint64_t>>; |
| |
| } /* namespace datasketches */ |
| |
| #include "theta_union_impl.hpp" |
| |
| #endif |