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json.h
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json.h
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/**
* \file json.h
*
* \author Eeli Reilin <eeli@nilier.org>,
* Mikko Ahonen <mikko.j.ahonen@jyu.fi>
* \version 0.1
* \date 8/25/2010
*/
#ifndef JSON_H
#define JSON_H
#include <QVariant>
#include <QString>
/**
* \enum JsonToken
*/
enum JsonToken
{
JsonTokenNone = 0,
JsonTokenCurlyOpen = 1,
JsonTokenCurlyClose = 2,
JsonTokenSquaredOpen = 3,
JsonTokenSquaredClose = 4,
JsonTokenColon = 5,
JsonTokenComma = 6,
JsonTokenString = 7,
JsonTokenNumber = 8,
JsonTokenTrue = 9,
JsonTokenFalse = 10,
JsonTokenNull = 11
};
/**
* \class Json
* \brief A JSON data parser
*
* Json parses a JSON data into a QVariant hierarchy.
*/
class Json
{
public:
/**
* Parse a JSON string
*
* \param json The JSON data
*/
static QVariant parse(const QString &json);
/**
* Parse a JSON string
*
* \param json The JSON data
* \param success The success of the parsing
*/
static QVariant parse(const QString &json, bool &success);
private:
/**
* Parses a value starting from index
*
* \param json The JSON data
* \param index The start index
* \param success The success of the parse process
*
* \return QVariant The parsed value
*/
static QVariant parseValue(const QString &json, int &index,
bool &success);
/**
* Parses an object starting from index
*
* \param json The JSON data
* \param index The start index
* \param success The success of the object parse
*
* \return QVariant The parsed object map
*/
static QVariant parseObject(const QString &json, int &index,
bool &success);
/**
* Parses an array starting from index
*
* \param json The JSON data
* \param index The starting index
* \param success The success of the array parse
*
* \return QVariant The parsed variant array
*/
static QVariant parseArray(const QString &json, int &index,
bool &success);
/**
* Parses a string starting from index
*
* \param json The JSON data
* \param index The starting index
* \param success The success of the string parse
*
* \return QVariant The parsed string
*/
static QVariant parseString(const QString &json, int &index,
bool &success);
/**
* Parses a number starting from index
*
* \param json The JSON data
* \param index The starting index
*
* \return QVariant The parsed number
*/
static QVariant parseNumber(const QString &json, int &index);
/**
* Get the last index of a number starting from index
*
* \param json The JSON data
* \param index The starting index
*
* \return The last index of the number
*/
static int lastIndexOfNumber(const QString &json, int index);
/**
* Skip unwanted whitespace symbols starting from index
*
* \param json The JSON data
* \param index The start index
*/
static void eatWhitespace(const QString &json, int &index);
/**
* Check what token lies ahead
*
* \param json The JSON data
* \param index The starting index
*
* \return int The upcoming token
*/
static int lookAhead(const QString &json, int index);
/**
* Get the next JSON token
*
* \param json The JSON data
* \param index The starting index
*
* \return int The next JSON token
*/
static int nextToken(const QString &json, int &index);
};
#endif //JSON_H