Revert 207805 "Differential updates for components. We are addin..."

trunk/src/chrome/browser/component_updater/component_patcher_operation.h

-// Copyright 2013 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_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_H_
-#define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_H_
-
-#include <string>
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "chrome/browser/component_updater/component_unpacker.h"
-
-namespace base {
-
-class FilePath;
-class DictionaryValue;
-
-}  // namespace base
-
-class ComponentInstaller;
-class ComponentPatcher;
-
-class DeltaUpdateOp {
- public:
-
-  DeltaUpdateOp();
-  virtual ~DeltaUpdateOp();
-
-  // Parses, runs, and verifies the operation, returning an error code if an
-  // error is encountered, and DELTA_OK otherwise. In case of errors,
-  // extended error information can be returned in the |error| parameter.
-  ComponentUnpacker::Error Run(
-      base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      const base::FilePath& unpack_dir,
-      ComponentPatcher* patcher,
-      ComponentInstaller* installer,
-      int* error);
-
- protected:
-  std::string output_sha256_;
-  base::FilePath output_abs_path_;
-
- private:
-  ComponentUnpacker::Error CheckHash();
-
-  // Subclasses must override DoParseArguments to parse operation-specific
-  // arguments. DoParseArguments returns DELTA_OK on success; any other code
-  // represents failure.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) = 0;
-
-  // Subclasses must override DoRun to actually perform the patching operation.
-  // DoRun returns DELTA_OK on success; any other code represents failure.
-  // Additional error information can be returned in the |error| parameter.
-  virtual ComponentUnpacker::Error DoRun(ComponentPatcher* patcher,
-                                         int* error) = 0;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOp);
-};
-
-// A 'copy' operation takes a file currently residing on the disk and moves it
-// into the unpacking directory: this represents "no change" in the file being
-// installed.
-class DeltaUpdateOpCopy : public DeltaUpdateOp {
- public:
-  DeltaUpdateOpCopy();
-
- private:
-  // Overrides of DeltaUpdateOp.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) OVERRIDE;
-
-  virtual ComponentUnpacker::Error DoRun(ComponentPatcher* patcher,
-                                         int* error) OVERRIDE;
-
-  base::FilePath input_abs_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOpCopy);
-};
-
-// A 'create' operation takes a full file that was sent in the delta update
-// archive and moves it into the unpacking directory: this represents the
-// addition of a new file, or a file so different that no bandwidth could be
-// saved by transmitting a differential update.
-class DeltaUpdateOpCreate : public DeltaUpdateOp {
- public:
-  DeltaUpdateOpCreate();
-
- private:
-  // Overrides of DeltaUpdateOp.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) OVERRIDE;
-
-  virtual ComponentUnpacker::Error DoRun(ComponentPatcher* patcher,
-                                         int* error) OVERRIDE;
-
-  base::FilePath patch_abs_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOpCreate);
-};
-
-// A 'bsdiff' operation takes an existing file on disk, and a bsdiff-
-// format patch file provided in the delta update package, and runs bsdiff
-// to construct an output file in the unpacking directory.
-class DeltaUpdateOpPatchBsdiff : public DeltaUpdateOp {
- public:
-  DeltaUpdateOpPatchBsdiff();
-
- private:
-  // Overrides of DeltaUpdateOp.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) OVERRIDE;
-
-  virtual ComponentUnpacker::Error DoRun(ComponentPatcher* patcher,
-                                         int* error) OVERRIDE;
-
-  base::FilePath patch_abs_path_;
-  base::FilePath input_abs_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOpPatchBsdiff);
-};
-
-// A 'courgette' operation takes an existing file on disk, and a Courgette-
-// format patch file provided in the delta update package, and runs Courgette
-// to construct an output file in the unpacking directory.
-class DeltaUpdateOpPatchCourgette : public DeltaUpdateOp {
- public:
-  DeltaUpdateOpPatchCourgette();
-
- private:
-  // Overrides of DeltaUpdateOp.
-  virtual ComponentUnpacker::Error DoParseArguments(
-      base::DictionaryValue* command_args,
-      const base::FilePath& input_dir,
-      ComponentInstaller* installer) OVERRIDE;
-
-  virtual ComponentUnpacker::Error DoRun(ComponentPatcher* patcher,
-                                         int* error) OVERRIDE;
-
-  base::FilePath patch_abs_path_;
-  base::FilePath input_abs_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeltaUpdateOpPatchCourgette);
-};
-
-// Factory function to create DeltaUpdateOp instances.
-DeltaUpdateOp* CreateDeltaUpdateOp(base::DictionaryValue* command);
-
-#endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_H_