| /** |
| * 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 QUICKSTEP_UTILITY_LIP_FILTER_LIP_FILTER_BUILDER_HPP_ |
| #define QUICKSTEP_UTILITY_LIP_FILTER_LIP_FILTER_BUILDER_HPP_ |
| |
| #include <cstddef> |
| #include <memory> |
| #include <vector> |
| |
| #include "catalog/CatalogTypedefs.hpp" |
| #include "utility/Macros.hpp" |
| #include "utility/lip_filter/LIPFilter.hpp" |
| |
| #include "glog/logging.h" |
| |
| namespace quickstep { |
| |
| class Type; |
| class ValueAccessor; |
| |
| /** \addtogroup Utility |
| * @{ |
| */ |
| |
| /** |
| * @brief Helper class for building LIPFilters from a relation (i.e. ValueAccessor). |
| */ |
| class LIPFilterBuilder { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param lip_filters The LIPFilters that will be built. |
| * @param attr_ids The target attribute ids for the LIPFilters. |
| * @param attr_types The target attribute types for the LIPFilters. |
| */ |
| LIPFilterBuilder(const std::vector<LIPFilter *> &lip_filters, |
| const std::vector<attribute_id> &attr_ids, |
| const std::vector<const Type *> &attr_types) { |
| DCHECK_EQ(lip_filters.size(), attr_ids.size()); |
| DCHECK_EQ(lip_filters.size(), attr_types.size()); |
| |
| build_entries_.reserve(lip_filters.size()); |
| for (std::size_t i = 0; i < lip_filters.size(); ++i) { |
| build_entries_.emplace_back(lip_filters[i], attr_ids[i], attr_types[i]); |
| } |
| } |
| |
| /** |
| * @brief Insert all the values from the given ValueAccessor into the attached |
| * LIPFilters with regard to each target attribute id in \p attr_ids_. |
| * |
| * @param accessor The ValueAccessor which will be used to access the values. |
| */ |
| void insertValueAccessor(ValueAccessor *accessor) { |
| for (auto &entry : build_entries_) { |
| entry.lip_filter->insertValueAccessor(accessor, |
| entry.attr_id, |
| entry.attr_type); |
| } |
| } |
| |
| private: |
| /** |
| * @brief Internal data structure for representing each LIPFilter building entry. |
| */ |
| struct BuildEntry { |
| BuildEntry(LIPFilter *lip_filter_in, |
| const attribute_id attr_id_in, |
| const Type *attr_type_in) |
| : lip_filter(lip_filter_in), |
| attr_id(attr_id_in), |
| attr_type(attr_type_in) { |
| } |
| LIPFilter *lip_filter; |
| const attribute_id attr_id; |
| const Type *attr_type; |
| }; |
| |
| std::vector<BuildEntry> build_entries_; |
| |
| DISALLOW_COPY_AND_ASSIGN(LIPFilterBuilder); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_UTILITY_LIP_FILTER_LIP_FILTER_BUILDER_HPP_ |