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 * notice, this list of conditions and the following disclaimer.
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// This file contains the declaration of class StructuredWriter.

#ifndef O3D_UTILS_CROSS_STRUCTURED_WRITER_H_
#define O3D_UTILS_CROSS_STRUCTURED_WRITER_H_

#include <string>

#include "base/basictypes.h"

namespace o3d {

// Interface of classes that can write structured data consisting of
// a hierarchy of objects (with named properties) and arrays of typed
// values.
class StructuredWriter {
 public:
  StructuredWriter() {}
  virtual ~StructuredWriter() {}

  // Opens an object block. An object block contains property / value
  // pairs.
  virtual void OpenObject() = 0;

  // Closes an object block.
  virtual void CloseObject() = 0;

  // Opens an array block. An array block contains zero or more values.
  virtual void OpenArray() = 0;

  // Closes an array block.
  virtual void CloseArray() = 0;

  // Hints to the writer that it should not add additional formatting
  // to make the output more readable. These can be nested.
  virtual void BeginCompacting() = 0;

  // Ends the hint that additional formatting is not necessary.
  virtual void EndCompacting() = 0;

  // Writes the name of a property. This should be immediately by a
  // value.
  virtual void WritePropertyName(const std::string& name) = 0;

  // Writes a boolean value.
  virtual void WriteBool(bool value) = 0;

  // Writes an integer value.
  virtual void WriteInt(int value) = 0;

  // Writes an unsigned integer value.
  virtual void WriteUnsignedInt(unsigned int value) = 0;

  // Writes a float value.
  virtual void WriteFloat(float value) = 0;

  // Writes a string value.
  virtual void WriteString(const std::string& value) = 0;

  // Writes a null value.
  virtual void WriteNull() = 0;

  // Flushes any unwritten content and closes the writer. No further
  // writes are allowed.
  virtual void Close() {}

 private:
  DISALLOW_COPY_AND_ASSIGN(StructuredWriter);
};
}  // namespace o3d

#endif  // O3D_UTILS_CROSS_STRUCTURED_WRITER_H_