| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed 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 AAPT2_FILTER_H |
| #define AAPT2_FILTER_H |
| |
| #include <string> |
| #include <vector> |
| |
| #include "util/Util.h" |
| |
| namespace aapt { |
| |
| /** A filter to be applied to a path segment. */ |
| class IPathFilter { |
| public: |
| virtual ~IPathFilter() = default; |
| |
| /** Returns true if the path should be kept. */ |
| virtual bool Keep(const std::string& path) = 0; |
| }; |
| |
| /** |
| * Path filter that keeps anything that matches the provided prefix. |
| */ |
| class PrefixFilter : public IPathFilter { |
| public: |
| explicit PrefixFilter(std::string prefix) : prefix_(std::move(prefix)) { |
| } |
| |
| /** Returns true if the provided path matches the prefix. */ |
| bool Keep(const std::string& path) override { |
| return util::StartsWith(path, prefix_); |
| } |
| |
| private: |
| const std::string prefix_; |
| }; |
| |
| /** Applies a set of IPathFilters to a path and returns true iif all filters keep the path. */ |
| class FilterChain : public IPathFilter { |
| public: |
| /** Adds a filter to the list to be applied to each path. */ |
| void AddFilter(std::unique_ptr<IPathFilter> filter) { |
| filters_.push_back(std::move(filter)); |
| } |
| |
| /** Returns true if all filters keep the path. */ |
| bool Keep(const std::string& path) override { |
| for (auto& filter : filters_) { |
| if (!filter->Keep(path)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| private: |
| std::vector<std::unique_ptr<IPathFilter>> filters_; |
| }; |
| |
| } // namespace aapt |
| |
| #endif // AAPT2_FILTER_H |