de.lmu.ifi.dbs.elki.utilities.iterator
Class AbstractFilteredIterator<IN,OUT extends IN>

java.lang.Object
  de.lmu.ifi.dbs.elki.utilities.iterator.AbstractFilteredIterator<IN,OUT>

Type Parameters:

IN - Input type

OUT - Output type

All Implemented Interfaces:

Iterator<OUT>

Direct Known Subclasses:

CurveVisFactory.CurveFilter, TypeFilterIterator

public abstract class AbstractFilteredIterator<IN,OUT extends IN>
extends Object
implements Iterator<OUT>

Abstract class to build filtered views on Iterables.

Field Summary

(package private) Iterator<IN>	itr The iterator to use.
(package private) OUT	nextobj The next object to return.

Constructor Summary

AbstractFilteredIterator()
Constructor.

Method Summary

protected abstract Iterator<IN>	getParentIterator() Get an iterator for the actual data.
boolean	hasNext()
protected void	init() Init the iterators
OUT	next()
void	remove()
protected abstract OUT	testFilter(IN nextobj) Test the filter predicate for a new object.
private void	updateNext() Find the next visualizer.

Methods inherited from class java.lang.Object

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

Field Detail

itr

Iterator<IN> itr

The iterator to use.

nextobj

OUT extends IN nextobj

The next object to return.

Constructor Detail

AbstractFilteredIterator

public AbstractFilteredIterator()

Constructor.

Method Detail

init

protected void init()

Init the iterators

getParentIterator

protected abstract Iterator<IN> getParentIterator()

Get an iterator for the actual data. Used in initialization.

Returns:

iterator

testFilter

protected abstract OUT testFilter(IN nextobj)

Test the filter predicate for a new object.

Parameters:

nextobj - Object to test

Returns:

cast object when true, null otherwise

updateNext

private void updateNext()

Find the next visualizer.

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<OUT extends IN>

next

public OUT next()

Specified by:

next in interface Iterator<OUT extends IN>

remove

public void remove()

Specified by:

remove in interface Iterator<OUT extends IN>