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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_API_RESOURCE_CONTROLLER_H_
#define CHROME_BROWSER_EXTENSIONS_API_API_RESOURCE_CONTROLLER_H_
#pragma once
#include <string>
#include <map>
#include "base/memory/linked_ptr.h"
#include "chrome/browser/extensions/api/api_resource.h"
namespace extensions {
class SerialConnection;
class Socket;
class UsbDeviceResource;
// kSrcIdKey, or "srcId," binds an APIResource to the onEvent closure that was
// optionally passed to the APIResource's create() method. We generated it in
// schema_generated_bindings.js; the application code is unaware of it.
extern const char kSrcIdKey[];
// APIController keeps track of a collection of APIResources and provides a
// convenient set of methods to work with them.
class APIResourceController {
public:
APIResourceController();
virtual ~APIResourceController();
// Takes ownership of api_resource.
int AddAPIResource(APIResource* api_resource);
// APIResourceController knows about all classes derived from APIResource.
// This is intentional to avoid scattering potentially unsafe static_cast<>
// operations throughout the codebase.
//
// Another alternative we considered and rejected was templatizing
// APIResourceController and scattering specialized versions throughout the
// codebase.
bool RemoveSocket(int api_resource_id);
bool RemoveSerialConnection(int api_resource_id);
bool RemoveUsbDeviceResource(int api_resource_id);
Socket* GetSocket(int api_resource_id) const;
SerialConnection* GetSerialConnection(int api_resource_id) const;
UsbDeviceResource* GetUsbDeviceResource(int api_resource_id) const;
private:
typedef std::map<int, linked_ptr<APIResource> > APIResourceMap;
APIResource* GetAPIResource(APIResource::APIResourceType api_resource_type,
int api_resource_id) const;
bool RemoveAPIResource(APIResource::APIResourceType api_resource_type,
int api_resource_id);
int GenerateAPIResourceId();
APIResourceMap* GetResourceMapForType(
APIResource::APIResourceType api_resource_type) const;
int next_api_resource_id_;
// We need finer-grained control over the lifetime of these instances
// than RAII can give us.
APIResourceMap* socket_resource_map_;
APIResourceMap* serial_connection_resource_map_;
APIResourceMap* usb_device_resource_map_;
DISALLOW_COPY_AND_ASSIGN(APIResourceController);
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_API_API_RESOURCE_CONTROLLER_H_
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