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/*
* Copyright (C) 2015 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 AAPT_RESOLVER_H
#define AAPT_RESOLVER_H
#include "Maybe.h"
#include "Resource.h"
#include "ResourceTable.h"
#include "ResourceValues.h"
#include <androidfw/AssetManager.h>
#include <androidfw/ResourceTypes.h>
#include <memory>
#include <vector>
namespace aapt {
/**
* Resolves symbolic references (package:type/entry) into resource IDs/objects.
* Encapsulates the search of library sources as well as the local ResourceTable.
*/
class Resolver {
public:
/**
* Creates a resolver with a local ResourceTable and an AssetManager
* loaded with library packages.
*/
Resolver(std::shared_ptr<const ResourceTable> table,
std::shared_ptr<const android::AssetManager> sources);
Resolver(const Resolver&) = delete; // Not copyable.
/**
* Holds the result of a resource name lookup.
*/
struct Entry {
/**
* The ID of the resource. ResourceId::isValid() may
* return false if the resource has not been assigned
* an ID.
*/
ResourceId id;
/**
* If the resource is an attribute, this will point
* to a valid Attribute object, or else it will be
* nullptr.
*/
const Attribute* attr;
};
/**
* Return the package to use when none is specified. This
* is the package name of the app being built.
*/
const std::u16string& getDefaultPackage() const;
/**
* Returns a ResourceID if the name is found. The ResourceID
* may not be valid if the resource was not assigned an ID.
*/
Maybe<ResourceId> findId(const ResourceName& name);
/**
* Returns an Entry if the name is found. Entry::attr
* may be nullptr if the resource is not an attribute.
*/
Maybe<Entry> findAttribute(const ResourceName& name);
const android::ResTable& getResTable() const;
private:
struct CacheEntry {
ResourceId id;
std::unique_ptr<Attribute> attr;
};
const CacheEntry* buildCacheEntry(const ResourceName& name);
std::shared_ptr<const ResourceTable> mTable;
std::shared_ptr<const android::AssetManager> mSources;
std::map<ResourceName, CacheEntry> mCache;
};
inline const std::u16string& Resolver::getDefaultPackage() const {
return mTable->getPackage();
}
inline const android::ResTable& Resolver::getResTable() const {
return mSources->getResources(false);
}
} // namespace aapt
#endif // AAPT_RESOLVER_H
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