Mapper::AbstractMapperIterator Class Reference

abstract base class for hash iterator mappping classes based on a mapper object and an iterator input source More...

Inheritance diagram for Mapper::AbstractMapperIterator:

Public Member Methods
	constructor (Qore::AbstractIterator iter)
	creates the iterator from the arguments passed More...
bool	hasBulk ()
	returns True if the iterator supports bulk mode; this method returns False (the default)
list< hash >	mapBulk (int size)
	performs bulk mapping; if the iterator does not support bulk mapping then it is simulated in this method More...
bool	next ()
	Moves the current position of the iterator to the next element; returns False if there are no more elements.
bool	valid ()
	returns True if the iterator is currently pointing at a valid element, False if not

Private Attributes
Qore::AbstractIterator	i
	input iterator; AbstractIterator::getValue() must return a hash

Detailed Description

abstract base class for hash iterator mappping classes based on a mapper object and an iterator input source

Member Function Documentation

constructor()

Mapper::AbstractMapperIterator::constructor

(

Qore::AbstractIterator

iter

)

creates the iterator from the arguments passed

Parameters

iter	input iterator; AbstractIterator::getValue() must return a hash

mapBulk()

list<hash> Mapper::AbstractMapperIterator::mapBulk

(

int

size

)

performs bulk mapping; if the iterator does not support bulk mapping then it is simulated in this method

Parameters

size	the number of rows to return

Returns

a list of mapped hashes with a maximum number of rows corresponding to the size argument; in case there is less input data than requested, the list returned could have fewer rows than requested; in case there is no more data, the return value is an empty list