it.uniroma3.mat.extendedset.wrappers.matrix

Interface BinaryMatrix.CellIterator

Enclosing class:

BinaryMatrix

public static interface BinaryMatrix.CellIterator

An Iterator-like interface

Method Summary

Methods

Modifier and Type	Method and Description
boolean	hasNext()
int[]	next() Returns the next cell in the iteration.
void	remove() Removes from the underlying matrix the last cell returned by the iterator (optional operation).
void	skipAllBefore(int row, int col) Skips all the cells before the the specified cell, so that next() gives the given cell or, if it does not exist, the cell immediately after according to the sorting provided by this set.

Method Detail

hasNext

boolean hasNext()

Returns:

true if the iterator has more cells.

next

int[] next()

Returns the next cell in the iteration. IMPORTANT: each iteration returns an array of two elements, where the first element is the row, while the second element is the column of the current cell. In order to reduce the produced heap garbage, there is only one array instantiated for each iterator, whose content is overridden at each iteration.

Returns:

the next cell in the iteration.

Throws:

NoSuchElementException - iteration has no more cells.

remove

void remove()

Removes from the underlying matrix the last cell returned by the iterator (optional operation). This method can be called only once per call to next. The behavior of an iterator is unspecified if the underlying collection is modified while the iteration is in progress in any way other than by calling this method.

Throws:

UnsupportedOperationException - if the remove operation is not supported by this Iterator.

IllegalStateException - if the next method has not yet been called, or the remove method has already been called after the last call to the next method.

skipAllBefore

void skipAllBefore(int row,
                 int col)

Skips all the cells before the the specified cell, so that next() gives the given cell or, if it does not exist, the cell immediately after according to the sorting provided by this set.

If cell is less than the next cell, it does nothing

Parameters:

row - row of the cell

col - column of the cell