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Handler.h
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106 lines (76 loc) · 2.47 KB
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//
// Handler.h
//
// Library: JSON
// Package: JSON
// Module: Handler
//
// Definition of the Handler class.
//
// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef JSON_Handler_INCLUDED
#define JSON_Handler_INCLUDED
#include "Poco/JSON/JSON.h"
#include "Poco/SharedPtr.h"
#include "Poco/Dynamic/Var.h"
#include "Poco/Dynamic/Struct.h"
namespace Poco {
namespace JSON {
class JSON_API Handler
/// Interface for handling parsing events generated by the JSON Parser.
///
/// An application can implement a subclass of Handler to implement
/// callback-based parsing of a JSON document, similar to how a SAX
/// parser would handle XML.
{
public:
using Ptr = SharedPtr<Handler>;
Handler();
/// Creates an empty Handler.
virtual ~Handler();
/// Destroys the Handler.
virtual void reset() = 0;
/// Resets the handler state.
virtual void startObject() = 0;
/// The parser has read a {, meaning a new object will be read.
virtual void endObject() = 0;
/// The parser has read a }, meaning the object is read.
virtual void startArray() = 0;
/// The parser has read a [, meaning a new array will be read.
virtual void endArray() = 0;
/// The parser has read a ], meaning the array is read.
virtual void key(const std::string& k) = 0;
/// A key of an object is read.
virtual void null() = 0;
/// A null value is read.
virtual void value(int v) = 0;
/// An integer value is read.
virtual void value(unsigned v) = 0;
/// 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) = 0;
/// A 64-bit integer value is read.
virtual void value(UInt64 v) = 0;
/// 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& value) = 0;
/// A string value is read.
virtual void value(double d) = 0;
/// A double value is read.
virtual void value(bool b) = 0;
/// A boolean value is read.
virtual Poco::Dynamic::Var asVar() const;
/// Returns the result of the parser (an object, array or string),
/// empty Var if there is no result.
virtual Poco::DynamicStruct asStruct() const;
/// Returns the result of the parser (an object, array or string),
/// empty Var if there is no result.
};
} } // namespace Poco::JSON
#endif // JSON_Handler_INCLUDED