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/*
* 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
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