edu.unh.sdb.datasource
Class RandomBlockIterator

java.lang.Object
  edu.unh.sdb.datasource.RandomBlockIterator

public class RandomBlockIterator
extends java.lang.Object

this class generates a BlockIterator that randomly moves within this ISBounds of the iteration data source. Iteration block does not partially overlap with the datablock of previous iteration steps. If setEnumWindow( int size) is called, enumeration window will be used during the iteration process. That means ISbounds of future iteration steps will be generated. The iteration space is partitioned based on the size of iteration block.

Constructor Summary

RandomBlockIterator(ISBounds partitionSpaceBounds, ISBounds iterationBounds, Indexable iterationSource)
The partSpaceBounds is the iterationBounds in the partitioned space

Method Summary

ISBounds[]	getEnumWindow()
int	getEnumWindowIndex()
ISBounds	getIteratorBounds() get the bounds of this block iterator
ISBounds	getWindowElement(int windowIndex) return the ISBounds of an indexed enumeration window element
void	init() initialize the iterator, read data values from the source into the iteration block.
boolean	isWindowOpen() return if the enumeration window is open or closed
static void	main(java.lang.String[] args)
void	next() move to next iteration step
ISBounds	nextBounds() get ISBounds of next iteration step
void	renewEnumWindow() preproces the iteration
void	setSource(DataSource iterationSource) Set the iteration data source
void	setWindowSize(int size) set the enumberation window size
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RandomBlockIterator

public RandomBlockIterator(ISBounds partitionSpaceBounds,
                           ISBounds iterationBounds,
                           Indexable iterationSource)

The partSpaceBounds is the iterationBounds in the partitioned space

Method Detail

getIteratorBounds

public ISBounds getIteratorBounds()

get the bounds of this block iterator

init

public void init()

initialize the iterator, read data values from the source into the iteration block. Currently I use BasicBlock as the container BasicBlock uses the default axisOrdering

setSource

public void setSource(DataSource iterationSource)

Set the iteration data source

setWindowSize

public void setWindowSize(int size)

set the enumberation window size

next

public void next()

move to next iteration step

isWindowOpen

public boolean isWindowOpen()

return if the enumeration window is open or closed

renewEnumWindow

public void renewEnumWindow()

preproces the iteration

getEnumWindow

public ISBounds[] getEnumWindow()

getWindowElement

public ISBounds getWindowElement(int windowIndex)

return the ISBounds of an indexed enumeration window element

getEnumWindowIndex

public int getEnumWindowIndex()

nextBounds

public ISBounds nextBounds()

get ISBounds of next iteration step

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

main

public static void main(java.lang.String[] args)