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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_EXTENSIONS_API_PROFILE_KEYED_API_FACTORY_H_
#define CHROME_BROWSER_EXTENSIONS_API_PROFILE_KEYED_API_FACTORY_H_
#include "chrome/browser/extensions/extension_system_factory.h"
#include "chrome/browser/profiles/incognito_helpers.h"
#include "chrome/browser/profiles/profile.h"
#include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
#include "components/browser_context_keyed_service/browser_context_keyed_service.h"
#include "components/browser_context_keyed_service/browser_context_keyed_service_factory.h"
namespace extensions {
template <typename T>
class ProfileKeyedAPIFactory;
// Instantiations of ProfileKeyedAPIFactory should use this base class
// and also define a static const char* service_name() function (used in the
// BrowserContextKeyedBaseFactory constructor). These fields should
// be accessible to the ProfileKeyedAPIFactory for the service.
class ProfileKeyedAPI : public BrowserContextKeyedService {
protected:
// Defaults for flags that control ProfileKeyedAPIFactory behavior.
// See BrowserContextKeyedBaseFactory for usage.
static const bool kServiceRedirectedInIncognito = false;
static const bool kServiceIsNULLWhileTesting = false;
static const bool kServiceHasOwnInstanceInIncognito = false;
static const bool kServiceIsCreatedWithBrowserContext = true;
// Users of this factory template must define a GetFactoryInstance()
// and manage their own instances (typically using LazyInstance or
// Singleton), because those cannot be included in more than one
// translation unit (and thus cannot be initialized in a header file).
//
// In the header file, declare GetFactoryInstance(), e.g.:
// class ProcessesAPI {
// ...
// public:
// static ProfileKeyedAPIFactory<ProcessesAPI>* GetFactoryInstance();
// };
//
// In the cc file, provide the implementation, e.g.:
// static base::LazyInstance<ProfileKeyedAPIFactory<ProcessesAPI> >
// g_factory = LAZY_INSTANCE_INITIALIZER;
//
// // static
// ProfileKeyedAPIFactory<ProcessesAPI>*
// ProcessesAPI::GetFactoryInstance() {
// return &g_factory.Get();
// }
};
// A template for factories for BrowserContextKeyedServices that manage
// extension APIs. T is a BrowserContextKeyedService that uses this factory
// template instead of its own separate factory definition to manage its
// per-profile instances.
template <typename T>
class ProfileKeyedAPIFactory : public BrowserContextKeyedServiceFactory {
public:
static T* GetForProfile(Profile* profile) {
return static_cast<T*>(
T::GetFactoryInstance()->GetServiceForBrowserContext(profile, true));
}
// Declare dependencies on other factories.
// By default, ExtensionSystemFactory is the only dependency; however,
// specializations can override this. Declare your specialization in
// your header file after the ProfileKeyedAPI class definition.
// Then in the cc file (or inline in the header), define it, e.g.:
// template <>
// ProfileKeyedAPIFactory<PushMessagingAPI>::DeclareFactoryDependencies() {
// DependsOn(ExtensionSystemFactory::GetInstance());
// DependsOn(ProfileSyncServiceFactory::GetInstance());
// }
void DeclareFactoryDependencies() {
DependsOn(ExtensionSystemFactory::GetInstance());
}
ProfileKeyedAPIFactory()
: BrowserContextKeyedServiceFactory(
T::service_name(),
BrowserContextDependencyManager::GetInstance()) {
DeclareFactoryDependencies();
}
virtual ~ProfileKeyedAPIFactory() {
}
private:
// BrowserContextKeyedServiceFactory implementation.
virtual BrowserContextKeyedService* BuildServiceInstanceFor(
content::BrowserContext* profile) const OVERRIDE {
return new T(static_cast<Profile*>(profile));
}
// BrowserContextKeyedBaseFactory implementation.
// These can be effectively overridden with template specializations.
virtual content::BrowserContext* GetBrowserContextToUse(
content::BrowserContext* context) const OVERRIDE {
if (T::kServiceRedirectedInIncognito)
return chrome::GetBrowserContextRedirectedInIncognito(context);
if (T::kServiceHasOwnInstanceInIncognito)
return chrome::GetBrowserContextOwnInstanceInIncognito(context);
return BrowserContextKeyedServiceFactory::GetBrowserContextToUse(context);
}
virtual bool ServiceIsCreatedWithBrowserContext() const OVERRIDE {
return T::kServiceIsCreatedWithBrowserContext;
}
virtual bool ServiceIsNULLWhileTesting() const OVERRIDE {
return T::kServiceIsNULLWhileTesting;
}
DISALLOW_COPY_AND_ASSIGN(ProfileKeyedAPIFactory);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_PROFILE_KEYED_API_FACTORY_H_
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