Qore Mapper Module Reference  1.4.1
Mapper::MapperIterator Class Reference

provides a hash iterator based on a mapper object and an iterator input source More...

Inheritance diagram for Mapper::MapperIterator:

Public Member Methods

 constructor (Qore::AbstractIterator i, hash< auto > mapv, *hash< auto > opts)
 creates the iterator from the arguments passed More...
 
 constructor (Qore::AbstractIterator i, Mapper::Mapper mapv)
 creates the iterator from the arguments passed More...
 
int getCount ()
 returns the internal record count More...
 
hash< auto > getValue ()
 returns the current row transformed with the mapper
 
 resetCount ()
 resets the internal record count More...
 
- Public Member Methods inherited from Mapper::AbstractMapperIterator
 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< hashmapBulk (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

Mapper::Mapper mapc
 data mapper
 
- Private Attributes inherited from Mapper::AbstractMapperIterator
Qore::AbstractIterator i
 input iterator; AbstractIterator::getValue() must return a hash
 

Detailed Description

provides a hash iterator based on a mapper object and an iterator input source

Member Function Documentation

◆ constructor() [1/2]

Mapper::MapperIterator::constructor ( Qore::AbstractIterator  i,
hash< auto >  mapv,
*hash< auto >  opts 
)

creates the iterator from the arguments passed

Parameters
iinput iterator; AbstractIterator::getValue() must return a hash
mapva hash providing field mappings; each hash key is the name of the output field; each value is either True (meaning no translations are done; the data is copied 1:1) or a hash describing the mapping; see Mapper Specification Format for detailed documnentation for this option
optsan optional hash of options for the mapper; see Mapper Options for a description of valid mapper options
Exceptions
MAP-ERRORthe map hash has a logical error (ex: "trunc" key given without "maxlen", invalid map key)

◆ constructor() [2/2]

Mapper::MapperIterator::constructor ( Qore::AbstractIterator  i,
Mapper::Mapper  mapv 
)

creates the iterator from the arguments passed

Parameters
iinput iterator; AbstractIterator::getValue() must return a hash
mapvthe mapper to transform the data

◆ getCount()

int Mapper::MapperIterator::getCount ( )

returns the internal record count

See also
resetCount()

◆ resetCount()

Mapper::MapperIterator::resetCount ( )

resets the internal record count

See also
getCount()