casa::PagedArrIter< T > Class Template Reference

A read/write Lattice iterator for PagedArrays. More...

#include <PagedArrIter.h>

Inheritance diagram for casa::PagedArrIter< T >:

List of all members.

Protected Member Functions
	PagedArrIter (const PagedArray< T > &data, const LatticeNavigator &method, Bool useRef)
	Construct the Iterator with the supplied data, and iteration strategy.
	PagedArrIter (const PagedArrIter< T > &other)
	The copy constructor uses reference sematics for the PagedArray and copy semantics for the cursor and Navigator.
virtual	~PagedArrIter ()
	Destructor (cleans up dangling references and releases cursor memory)
PagedArrIter< T > &	operator= (const PagedArrIter< T > &other)
	The assignment operator uses reference sematics for the PagedArray and copy semantics for the cursor and Navigator.
virtual LatticeIterInterface< T > *	clone () const
	Clone the object.
Private Member Functions
void	setupTileCache ()
	Setup the cache in the tiled storage manager.
Private Attributes
PagedArray< T >	itsData
	reference to the PagedArray
Friends
class	PagedArray< T >

---

Detailed Description

template<class T>
class casa::PagedArrIter< T >

A read/write Lattice iterator for PagedArrays.

Intended use:

Internal

Review Status

Reviewed By:

Peter Barnes

Date Reviewed:

1999/10/30

Test programs:

tLatticeIterator

Demo programs:

dPagedArray

Prerequisite

• PagedArray
• LatticeIterator
• LatticeIterInterface
• letter/envelope schemes, eg. Coplien, "Advanced C++", ch 5.5

Etymology

The PagedArrIter class name is a contraction of Paged Array Iterator and reflects its role as the methods for iterating through Lattices which are resident on disk.

Synopsis

This class is not meant for general use. Instead class LatticeIterator should be used to iterate through a PagedArray or any other Lattice object (like a ArrayLattice ).

PagedArrIter is derived from LatticeIterInterface and implements the iterator for a PagedArray object. This iterator is somewhat special because it sets the PagedArray cache size at the start of an iteration.

Motivation

For for each derivation of Lattice to make as efficient an iterator as possible. The letter/envelope scheme allowed us to hide the special bits in classes like the one you see here.

Template Type Argument Requirements (T)

• Restricted to the type of the PagedArray argument in the constructors

Definition at line 91 of file PagedArrIter.h.

---

Constructor & Destructor Documentation

template<class T>

casa::PagedArrIter< T >::PagedArrIter	(	const PagedArray< T > &	data,
		const LatticeNavigator &	method,
		Bool	useRef
	)		[protected]

Construct the Iterator with the supplied data, and iteration strategy.

template<class T>

casa::PagedArrIter< T >::PagedArrIter

(

const PagedArrIter< T > &

other

)

[protected]

The copy constructor uses reference sematics for the PagedArray and copy semantics for the cursor and Navigator.

This way the newly constructed PagedArrIter can independently iterate through the same data set. (with the same cursor shape etc.)

template<class T>

virtual casa::PagedArrIter< T >::~PagedArrIter

(

)

[protected, virtual]

Destructor (cleans up dangling references and releases cursor memory)

---

Member Function Documentation

template<class T>

virtual LatticeIterInterface<T>* casa::PagedArrIter< T >::clone

(

)

const [protected, virtual]

Clone the object.

Reimplemented from casa::LatticeIterInterface< T >.

template<class T>

PagedArrIter<T>& casa::PagedArrIter< T >::operator=

(

const PagedArrIter< T > &

other

)

[protected]

The assignment operator uses reference sematics for the PagedArray and copy semantics for the cursor and Navigator.

This way the PagedArrIter objects share the same data set but independently iterate with cursors of the same size.

template<class T>

void casa::PagedArrIter< T >::setupTileCache

(

)

[private]

Setup the cache in the tiled storage manager.

---

Friends And Related Function Documentation

template<class T>

friend class PagedArray< T > [friend]

Definition at line 93 of file PagedArrIter.h.

---

Member Data Documentation

template<class T>

PagedArray<T> casa::PagedArrIter< T >::itsData [private]

reference to the PagedArray

Definition at line 129 of file PagedArrIter.h.

---

The documentation for this class was generated from the following file:

• casacore/lattices/Lattices/PagedArrIter.h