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Mapper::MapperIterator Class Reference

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

Inheritance diagram for Mapper::MapperIterator:
[legend]

## Public Member Functions

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

## Protected Attributes

Mapper::Mapper | mapc
| data mapper
Protected 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

  i | input iterator; AbstractIterator::getValue() must return a hash
  mapv | a 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
  opts | an optional hash of options for the mapper; see Mapper Options for a description of valid mapper options

Exceptions

  MAP-ERROR | the 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

  i | input iterator; AbstractIterator::getValue() must return a hash
  mapv | the 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()