| /* |
| * 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 ANDROID_VINTF_XML_FILE_GROUP_H |
| #define ANDROID_VINTF_XML_FILE_GROUP_H |
| |
| #include <map> |
| #include <type_traits> |
| |
| #include "MapValueIterator.h" |
| #include "XmlFile.h" |
| |
| namespace android { |
| namespace vintf { |
| |
| // A XmlFileGroup is a wrapped multimap from name to T, where T |
| // must be a subclass of XmlFile. |
| template <typename T> |
| struct XmlFileGroup { |
| static_assert(std::is_base_of<XmlFile, T>::value, "T must be a subclass of XmlFile"); |
| |
| private: |
| using map = std::multimap<std::string, T>; |
| using const_range = std::pair<typename map::const_iterator, typename map::const_iterator>; |
| |
| public: |
| virtual ~XmlFileGroup() {} |
| |
| bool addXmlFile(T&& t) { |
| if (!shouldAddXmlFile(t)) { |
| return false; |
| } |
| std::string name = t.name(); |
| mXmlFiles.emplace(std::move(name), std::move(t)); |
| return true; |
| } |
| |
| virtual bool shouldAddXmlFile(const T&) const { return true; } |
| |
| const_range getXmlFiles(const std::string& key) const { return mXmlFiles.equal_range(key); } |
| |
| // Return an iterable to all T objects. Call it as follows: |
| // for (const auto& e : vm.getXmlFiles()) { } |
| ConstMultiMapValueIterable<std::string, T> getXmlFiles() const { |
| return ConstMultiMapValueIterable<std::string, T>(mXmlFiles); |
| } |
| |
| bool addAllXmlFiles(XmlFileGroup* other, std::string* error) { |
| for (auto& pair : other->mXmlFiles) { |
| if (!addXmlFile(std::move(pair.second))) { |
| if (error) { |
| *error = pair.first; |
| } |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| protected: |
| map mXmlFiles; |
| }; |
| |
| } // namespace vintf |
| } // namespace android |
| |
| #endif // ANDROID_VINTF_XML_FILE_GROUP_H |