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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the declaration of class JsonWriter.
#ifndef O3D_UTILS_CROSS_JSON_WRITER_H_
#define O3D_UTILS_CROSS_JSON_WRITER_H_
#include <string>
#include "base/basictypes.h"
#include "utils/cross/text_writer.h"
#include "utils/cross/structured_writer.h"
namespace o3d {
// A JsonWriter is used to write data to a TextWriter using
// the JSON format. See http://json.org.
class JsonWriter : public StructuredWriter {
public:
// Construct a JsonWriter that writes to the specified TextWriter.
// Specify the number of spaces for each indentation level.
JsonWriter(TextWriter* writer, int indent_spaces);
// Flushes the remaining output and closes the underlying TextWriter.
virtual ~JsonWriter();
// Writes the opening brace of an JSON object literal.
virtual void OpenObject();
// Writes the closing brace of an JSON object literal.
virtual void CloseObject();
// Writes the opening bracket of a JSON array literal.
virtual void OpenArray();
// Writes the closing bracket of a JSON array literal.
virtual void CloseArray();
// Disables redundant white space until compacting is closed.
// Can be nested.
virtual void BeginCompacting();
// Disables previously opened compacting.
virtual void EndCompacting();
// Writes the name of a property surrounded by quotes. Follow
// with a call to one of the functions that writes a value.
virtual void WritePropertyName(const std::string& name);
// Writes a boolean literal.
virtual void WriteBool(bool value);
// Writes a number literal.
virtual void WriteInt(int value);
// Writes a number literal.
virtual void WriteUnsignedInt(unsigned int value);
// Writes a number literal.
virtual void WriteFloat(float value);
// Writes a string literal with JSON escape sequences for
// special characters.
virtual void WriteString(const std::string& value);
// Writes a null literal.
virtual void WriteNull();
// Flushes the remaining output and closes the underlying TextWriter.
virtual void Close();
private:
void IncreaseIndentation();
void DecreaseIndentation();
void ScheduleNewLine();
void ScheduleComma();
void CancelComma();
void WritePending();
void WriteEscapedString(const std::string& unescaped);
TextWriter* writer_;
int indent_spaces_;
int compacting_level_;
int current_indentation_;
bool new_line_pending_;
bool comma_pending_;
DISALLOW_COPY_AND_ASSIGN(JsonWriter);
};
} // namespace o3d
#endif // O3D_UTILS_CROSS_JSON_WRITER_H_
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