org.datamixer.collections
Class RandomIterator

java.lang.Object
  org.datamixer.collections.DatamixerIterator
      org.datamixer.collections.RandomIterator

All Implemented Interfaces:

DatamixerEventGenerator, java.util.Iterator

public class RandomIterator

extends DatamixerIterator

Field Summary

protected int	count_ the number of indexes that have been chosen
protected Value	current_ current value
protected DatamixerList	list_ the associated list
protected java.util.Random	random_ random number generator
protected int[]	remaining_ array to hold indexes of remaining values, when selecting without replacement
protected boolean	replace_ select with replacement if true
protected long	seed_ seed for random number generator
protected int	size_ the collection size

Fields inherited from class org.datamixer.collections.DatamixerIterator

collection_, debugEnabled_, done_, doneChecked_, doneListeners_, format_, formatPattern_, id_, infoEnabled_, initialized_, logger_, name_, nextListeners_, path_, repeat_, repeatSet_

Constructor Summary

RandomIterator()

Method Summary

protected boolean	doDone() Returns false, always.
protected void	doGenerate() Generate the next element in the collection.
protected Value	doGetCurrentValue() Returns the current value.
protected void	doInitialize() Initialization.
protected void	doReset() Resets the iterator to an initial state.
int	getDataType() Returns the datatype.
java.text.Format	getFormat(java.lang.String pattern) Returns an appropriate Format object.
boolean	getReplace()
long	getSeed()
protected int	randomIndex() Choose a random index.
void	setReplace(boolean value)
void	setSeed(long value)
protected void	updateRemaining() Resets the iterator to an initial state.

Methods inherited from class org.datamixer.collections.DatamixerIterator

addDatamixerListener, doFireDatamixerEvent, fireDatamixerEvent, generate, getCollection, getContainer, getCurrent, getCurrentValue, getFormatPattern, getHasNext, getId, getListeners, getName, getNext, getNextValue, getPath, getRepeat, hasNext, initialize, next, remove, removeDatamixerListener, reset, setCollection, setContainer, setCurrentValue, setDataType, setFormatPattern, setId, setName, setRepeat, toString, updateCurrentValue

Methods inherited from class java.lang.Object

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

Field Detail

list_

protected DatamixerList list_

the associated list

random_

protected java.util.Random random_

random number generator

seed_

protected long seed_

seed for random number generator

replace_

protected boolean replace_

select with replacement if true

size_

protected int size_

the collection size

current_

protected Value current_

current value

count_

protected int count_

the number of indexes that have been chosen

remaining_

protected int[] remaining_

array to hold indexes of remaining values, when selecting without replacement

Constructor Detail

RandomIterator

public RandomIterator()

Method Detail

getDataType

public int getDataType()

Returns the datatype. Datatypes are defined in java.sql.Types.

Overrides:

getDataType in class DatamixerIterator

doGetCurrentValue

protected Value doGetCurrentValue()

Returns the current value.

Specified by:

doGetCurrentValue in class DatamixerIterator

Returns:

the current value.

getFormat

public java.text.Format getFormat(java.lang.String pattern)

Returns an appropriate Format object.

Overrides:

getFormat in class DatamixerIterator

doInitialize

protected void doInitialize()
                     throws DatamixerException

Initialization.

Overrides:

doInitialize in class DatamixerIterator

Throws:

DatamixerException

doDone

protected boolean doDone()
                  throws DatamixerException

Description copied from class: DatamixerIterator

Returns false, always.

Overrides:

doDone in class DatamixerIterator

Throws:

DatamixerException

doGenerate

protected void doGenerate()
                   throws DatamixerException

Description copied from class: DatamixerIterator

Generate the next element in the collection.

Overrides:

doGenerate in class DatamixerIterator

Throws:

DatamixerException

doReset

protected void doReset()
                throws DatamixerException

Resets the iterator to an initial state.

Overrides:

doReset in class DatamixerIterator

Throws:

DatamixerException

getSeed

public long getSeed()

setSeed

public void setSeed(long value)

getReplace

public boolean getReplace()

setReplace

public void setReplace(boolean value)

randomIndex

protected int randomIndex()

Choose a random index.

updateRemaining

protected void updateRemaining()

Resets the iterator to an initial state.