// Copyright 2008, Google Inc.
//
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//
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//     this list of conditions and the following disclaimer.
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//     used to endorse or promote products derived from this software without
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#ifndef GEARS_OPENSOURCE_GEARS_BLOB_BLOB_BUILDER_H__
#define GEARS_OPENSOURCE_GEARS_BLOB_BLOB_BUILDER_H__

#ifdef OFFICIAL_BUILD
// The blob API has not been finalized for official builds
#else

#include <vector>
#include "gears/base/common/basictypes.h"
#include "gears/base/common/scoped_refptr.h"
#include "gears/base/common/string16.h"
#include "third_party/scoped_ptr/scoped_ptr.h"

class BlobInterface;
class File;

// Creates a Blob from multiple data sources.
class BlobBuilder {
 public:
  BlobBuilder();
  ~BlobBuilder();

  // Blobs are always appended to the end of the list.
  // Returns false if the blob could not be added.
  bool AddBlob(BlobInterface *blob);

  // Appends raw data.  Returns false if the data could not be added.
  bool AddData(const void *data, int64 length);

  // String data is assumed to be UTF16 and will be converted to UTF8.
  // Returns false if the data could not be added.
  bool AddString(const std::string16 &data);

  // Returns a Blob instance containing all the data added.
  // It also has the side-effect of resetting the BlobBuilder.
  void CreateBlob(scoped_refptr<BlobInterface> *blob);

  // Returns the current total length of all data.
  int64 Length() const;

 private:
  void PushDataAsBlob();

  std::vector<scoped_refptr<BlobInterface> > blob_list_;
  std::vector<uint8> data_;
  scoped_ptr<File> file_;
  DISALLOW_EVIL_CONSTRUCTORS(BlobBuilder);
};

#endif  // not OFFICIAL_BUILD

#endif  // GEARS_OPENSOURCE_GEARS_BLOB_BLOB_BUILDER_H__