Base class for value range processors. More...

#include <queryparser.h>

Inheritance diagram for Xapian::ValueRangeProcessor:

Public Member Functions
	ValueRangeProcessor ()
	Default constructor.

virtual	~ValueRangeProcessor ()
	Destructor.

virtual Xapian::valueno	operator() (std::string &begin, std::string &end)=0
	Check for a valid range of this type.

ValueRangeProcessor *	release ()
	Start reference counting this object.

const ValueRangeProcessor *	release () const
	Start reference counting this object.

Detailed Description

Base class for value range processors.

Member Function Documentation

◆ operator()()

virtual Xapian::valueno Xapian::ValueRangeProcessor::operator()	(	std::string &	begin,
		std::string &	end
	)

pure virtual

Check for a valid range of this type.

Parameters

[in,out]	begin	The start of the range as specified in the query string by the user. This parameter is a non-const reference so the ValueRangeProcessor can modify it to return the value to start the range with.
[in,out]	end	The end of the range. This is also a non-const reference so it can be modified.

Returns: If this ValueRangeProcessor recognises the range BEGIN..END it returns the value slot number to range filter on. Otherwise it returns Xapian::BAD_VALUENO.

Implemented in Xapian::StringValueRangeProcessor, Xapian::DateValueRangeProcessor, and Xapian::NumberValueRangeProcessor.

◆ release() [1/2]

ValueRangeProcessor * Xapian::ValueRangeProcessor::release ( )

inline

Start reference counting this object.

You can hand ownership of a dynamically allocated ValueRangeProcessor object to Xapian by calling release() and then passing the object to a Xapian method. Xapian will arrange to delete the object once it is no longer required.

◆ release() [2/2]

const ValueRangeProcessor * Xapian::ValueRangeProcessor::release ( ) const