com.bigdata.btree.filter
Class TupleUpdater<E>

java.lang.Object
  com.bigdata.btree.filter.TupleFilter<E>
      com.bigdata.btree.filter.TupleUpdater<E>

Type Parameters:

E -

All Implemented Interfaces:

ITupleFilter<E>, cutthecrap.utils.striterators.IFilter, Serializable

Direct Known Subclasses:

FileVersionDeleter

public abstract class TupleUpdater<E>
extends TupleFilter<E>

Filter allows mutation of the visited ITuples.

Version:

$Id: TupleUpdater.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

See Also:

Serialized Form

Nested Class Summary

protected class

TupleUpdater.Updaterator

Nested classes/interfaces inherited from class com.bigdata.btree.filter.TupleFilter

TupleFilter.Filterator

Field Summary

Fields inherited from class com.bigdata.btree.filter.TupleFilter

log, state

Constructor Summary

TupleUpdater()

TupleUpdater(Object state)

Method Summary

ITupleIterator<E>	filter(Iterator src) Strengthened return type.
protected abstract void	update(IIndex ndx, ITuple<E> tuple) You may implement this method to update the state of the visited tuple in the backing index.

Methods inherited from class com.bigdata.btree.filter.TupleFilter

isValid

Methods inherited from class java.lang.Object

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

Constructor Detail

TupleUpdater

public TupleUpdater()

TupleUpdater

public TupleUpdater(Object state)

Method Detail

filter

public ITupleIterator<E> filter(Iterator src)

Description copied from interface: ITupleFilter

Strengthened return type.

Specified by:

filter in interface ITupleFilter<E>

Specified by:

filter in interface cutthecrap.utils.striterators.IFilter

Overrides:

filter in class TupleFilter<E>

update

protected abstract void update(IIndex ndx,
                               ITuple<E> tuple)

You may implement this method to update the state of the visited tuple in the backing index.

Note: If you modify tuple then that modification will be visitible to the consumer of the iterator.

Parameters:

ndx - The index on which the ITupleCursor is reading.

tuple - The tuple that is being visited.