class Poco::JSON::Handler
Overview
Interface for handling parsing events generated by the JSON Parser. More…
#include <Handler.h> class Handler { public: // typedefs typedef SharedPtr<Handler> Ptr; // methods virtual void reset() = 0; virtual void startObject() = 0; virtual void endObject() = 0; virtual void startArray() = 0; virtual void endArray() = 0; virtual void key(const std::string& k) = 0; virtual void null() = 0; virtual void value(int v) = 0; virtual void value(unsigned v) = 0; virtual void value(const std::string& value) = 0; virtual void value(double d) = 0; virtual void value(bool b) = 0; virtual Poco::Dynamic::Var asVar() const; virtual Poco::DynamicStruct asStruct() const; }; // direct descendants class ParseHandler; class PrintHandler;
Detailed Documentation
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.
Methods
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.
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.