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ParseHandler.h
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169 lines (121 loc) · 2.98 KB
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//
// ParseHandler.h
//
// Library: JSON
// Package: JSON
// Module: ParseHandler
//
// Definition of the ParseHandler class.
//
// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef JSON_ParseHandler_INCLUDED
#define JSON_ParseHandler_INCLUDED
#include "Poco/JSON/Handler.h"
#include <stack>
namespace Poco {
namespace JSON {
class JSON_API ParseHandler: public Handler
/// ParseHandler is the default handler for the JSON Parser.
///
/// This handler will construct an Object or Array based
/// on the handlers called by the Parser.
{
public:
ParseHandler(bool preserveObjectOrder = false);
/// Creates the ParseHandler.
///
/// If preserveObjectOrder is true, the order of properties
/// inside objects is preserved. Otherwise, items
/// will be sorted by keys.
virtual ~ParseHandler();
/// Destroys the ParseHandler.
virtual void reset();
/// Resets the handler state.
void startObject();
/// Handles a '{'; a new object is started.
void endObject();
/// Handles a '}'; the object is closed.
void startArray();
/// Handles a '['; a new array is started.
void endArray();
/// Handles a ']'; the array is closed.
void key(const std::string& k);
/// A key is read
Dynamic::Var asVar() const;
/// Returns the result of the parser (an object or an array).
virtual void value(int v);
/// An integer value is read
virtual void value(unsigned v);
/// An unsigned value is read. This will only be triggered if the
/// value cannot fit into a signed int.
#if defined(POCO_HAVE_INT64)
virtual void value(Int64 v);
/// A 64-bit integer value is read
virtual void value(UInt64 v);
/// An unsigned 64-bit integer value is read. This will only be
/// triggered if the value cannot fit into a signed 64-bit integer.
#endif
virtual void value(const std::string& s);
/// A string value is read.
virtual void value(double d);
/// A double value is read.
virtual void value(bool b);
/// A boolean value is read.
virtual void null();
/// A null value is read.
private:
void setValue(const Poco::Dynamic::Var& value);
typedef std::stack<Dynamic::Var> Stack;
Stack _stack;
std::string _key;
Dynamic::Var _result;
bool _preserveObjectOrder;
};
//
// inlines
//
inline Dynamic::Var ParseHandler::asVar() const
{
return _result;
}
inline void ParseHandler::value(int v)
{
setValue(v);
}
inline void ParseHandler::value(unsigned v)
{
setValue(v);
}
#if defined(POCO_HAVE_INT64)
inline void ParseHandler::value(Int64 v)
{
setValue(v);
}
inline void ParseHandler::value(UInt64 v)
{
setValue(v);
}
#endif
inline void ParseHandler::value(const std::string& s)
{
setValue(s);
}
inline void ParseHandler::value(double d)
{
setValue(d);
}
inline void ParseHandler::value(bool b)
{
setValue(b);
}
inline void ParseHandler::null()
{
Poco::Dynamic::Var empty;
setValue(empty);
}
} } // namespace Poco::JSON
#endif // JSON_ParseHandler_INCLUDED