GDataDB support with leveldb.

chrome/browser/chromeos/gdata/gdata_files.h

 // 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_CHROMEOS_GDATA_GDATA_FILES_H_
 #define CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILES_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 41 matching lines @@
   REGULAR_FILE,
   HOSTED_DOCUMENT,
 };
 
 // Base class for representing files and directories in gdata virtual file
 // system.
 class GDataEntry {
  public:
   explicit GDataEntry(GDataDirectory* parent, GDataRootDirectory* root);
   virtual ~GDataEntry();
+
   virtual GDataFile* AsGDataFile();
   virtual GDataDirectory* AsGDataDirectory();
   virtual GDataRootDirectory* AsGDataRootDirectory();
 
+  // const versions of AsGDataFile and AsGDataDirectory.
+  const GDataFile* AsGDataFile() const;

[satorux1, 2012/04/23 17:40:41]

function overloading should be avoided. can you rename the existing functions to
be AsMutableGDataFile()? or name the new one like AsGDataFileConst()?

[achuithb, 2012/04/24 08:09:36]

Done.

+  const GDataDirectory* AsGDataDirectory() const;
+
   // Converts DocumentEntry into GDataEntry.
   static GDataEntry* FromDocumentEntry(GDataDirectory* parent,
                                           DocumentEntry* doc,
                                           GDataRootDirectory* root);
 
+  // Serialize/Parse to/from string via proto classes.
+  void SerializeToString(std::string* serialized_proto) const;
+  static scoped_ptr<GDataEntry> FromProtoString(
+      const std::string& serialized_proto);
+
   // Convert to/from proto.
   void FromProto(const GDataEntryProto& proto);
   void ToProto(GDataEntryProto* proto) const;
 
   // Escapes forward slashes from file names with magic unicode character
   // \u2215 pretty much looks the same in UI.
   static std::string EscapeUtf8FileName(const std::string& input);
 
   // Unescapes what was escaped in EScapeUtf8FileName.
   static std::string UnescapeUtf8FileName(const std::string& input);
 
   GDataDirectory* parent() { return parent_; }
   const base::PlatformFileInfo& file_info() const { return file_info_; }
+
   const FilePath::StringType& file_name() const { return file_name_; }
-  const FilePath::StringType& title() const {
-    return title_;
-  }
-  void set_title(const FilePath::StringType& title) {
-    title_ = title;
-  }
   void set_file_name(const FilePath::StringType& name) { file_name_ = name; }
 
+  const FilePath::StringType& title() const { return title_; }
+  void set_title(const FilePath::StringType& title) { title_ = title; }
+
   // The unique resource ID associated with this file system entry.
   const std::string& resource_id() const { return resource_id_; }
+  void set_resource_id(const std::string& res_id) { resource_id_ = res_id; }
 
   // The content URL is used for downloading regular files as is.
   const GURL& content_url() const { return content_url_; }
+  void set_content_url(const GURL& url) { content_url_ = url; }
 
   // The edit URL is used for removing files and hosted documents.
   const GURL& edit_url() const { return edit_url_; }
 
   // The resource id of the parent folder. This piece of information is needed
   // to pair files from change feeds with their directory parents withing the
   // existing file system snapshot (GDataRootDirectory::resource_map_).
   const std::string& parent_resource_id() const { return parent_resource_id_; }
 
   // True if file was deleted. Used only for instances that are generated from
@@ skipping 96 matching lines @@
     return cache_state &= ~CACHE_STATE_DIRTY;
   }
 
   DocumentEntry::EntryKind kind() const { return kind_; }
   const GURL& thumbnail_url() const { return thumbnail_url_; }
   const GURL& alternate_url() const { return alternate_url_; }
   const std::string& content_mime_type() const { return content_mime_type_; }
   const std::string& etag() const { return etag_; }
   const std::string& id() const { return id_; }
   const std::string& file_md5() const { return file_md5_; }
+  void set_file_md5(const std::string& file_md5) { file_md5_ = file_md5; }
   const std::string& document_extension() const { return document_extension_; }
   bool is_hosted_document() const { return is_hosted_document_; }
 
   // Overrides GDataEntry::SetFileNameFromTitle() to set |file_name_| based
   // on the value of |title_| as well as |is_hosted_document_| and
   // |document_extension_| for hosted documents.
   virtual void SetFileNameFromTitle() OVERRIDE;
 
  private:
   // Content URL for files.
@@ skipping 214 matching lines @@
   base::Time last_serialized_;
   int largest_changestamp_;
   size_t serialized_size_;
 
   DISALLOW_COPY_AND_ASSIGN(GDataRootDirectory);
 };
 
 }  // namespace gdata
 
 #endif  // CHROME_BROWSER_CHROMEOS_GDATA_GDATA_FILES_H_