/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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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#ifndef ANDROID_VINTF_XML_FILE_GROUP_H
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#define ANDROID_VINTF_XML_FILE_GROUP_H
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#include <map>
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#include <type_traits>
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#include "MapValueIterator.h"
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#include "XmlFile.h"
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namespace android {
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namespace vintf {
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// A XmlFileGroup is a wrapped multimap from name to T, where T
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// must be a subclass of XmlFile.
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template <typename T>
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struct XmlFileGroup {
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static_assert(std::is_base_of<XmlFile, T>::value, "T must be a subclass of XmlFile");
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private:
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using map = std::multimap<std::string, T>;
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using const_range = std::pair<typename map::const_iterator, typename map::const_iterator>;
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public:
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virtual ~XmlFileGroup() {}
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bool addXmlFile(T&& t) {
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if (!shouldAddXmlFile(t)) {
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return false;
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}
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std::string name = t.name();
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mXmlFiles.emplace(std::move(name), std::move(t));
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return true;
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}
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virtual bool shouldAddXmlFile(const T&) const { return true; }
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const_range getXmlFiles(const std::string& key) const { return mXmlFiles.equal_range(key); }
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// Return an iterable to all T objects. Call it as follows:
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// for (const auto& e : vm.getXmlFiles()) { }
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ConstMultiMapValueIterable<std::string, T> getXmlFiles() const {
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return ConstMultiMapValueIterable<std::string, T>(mXmlFiles);
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}
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bool addAllXmlFiles(XmlFileGroup* other, std::string* error) {
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for (auto& pair : other->mXmlFiles) {
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if (!addXmlFile(std::move(pair.second))) {
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if (error) {
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*error = "XML File \"" + pair.first + "\" has a conflict.";
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}
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return false;
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}
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}
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other->mXmlFiles.clear();
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return true;
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}
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protected:
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map mXmlFiles;
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};
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} // namespace vintf
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} // namespace android
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#endif // ANDROID_VINTF_XML_FILE_GROUP_H
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