RowSelection: An iterator over the rows of a Space. More...

#include <space.h>

Private Member Functions
	RowSelection (pChar query, pSpace p_space)
	The constructor for a RowSelection.

virtual bool	restart ()
	Restart the iterator.

virtual RowNumber	next ()
	Get the next row.

Private Attributes
bool	is_valid = false
	True if the iterator was created by a successful query.

Detailed Description

RowSelection: An iterator over the rows of a Space.

This is an abstract class that provides the interface of an iterator over rows. The where() method of a Space returns a RowSelection descendant that is compatible with this interface.

See also: Space

Constructor & Destructor Documentation

◆ RowSelection()

jazz_bebop::RowSelection::RowSelection	(	pChar	query,
		pSpace	p_space
	)

inlineprivate

The constructor for a RowSelection.

Parameters

query	A query string that is understood by the descendant. In Bop, this is the content of a WHERE clause with a syntax that depends on how the Space is indexed (Time, categorical, Embedding storage, ...).
p_space	The Space that created the object is required because the descendant may need to call .get_index_data() or other methods.

Member Function Documentation

◆ restart()

virtual bool jazz_bebop::RowSelection::restart ( )

inlineprivatevirtual

Restart the iterator.

Returns: True if the iterator was successfully restarted, false if it is not possible.

◆ next()

virtual RowNumber jazz_bebop::RowSelection::next ( )

inlineprivatevirtual

Get the next row.

Returns: The next row number or SPACE_ROW_STOP_ITERATOR if the iteration is exhausted.

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

space.h