com.bigdata.btree.filter

Class TupleRemover<E>

java.lang.Object

cutthecrap.utils.striterators.FilterBase

com.bigdata.btree.filter.TupleRemover<E>

Type Parameters:

E -

All Implemented Interfaces:

ITupleFilter<E>, IFilter, IPropertySet, Serializable, Cloneable

public abstract class TupleRemover<E>
extends FilterBase
implements ITupleFilter<E>

Visits all elements visited by the source iterator and removes those matching the filter.

Note: If you want to only visit those elements that are being removed, then apply a TupleFilter first and then stack the TupleRemover on top and make #remove(Object) always return true. Note that you MUST also specify IRangeQuery.CURSOR if the index is a local B+Tree since traversal with concurrent modification is otherwise not supported.

Version:

$Id$

Author:

Bryan Thompson

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TupleRemover()

Method Summary

Methods

Modifier and Type	Method and Description
ITupleIterator<E>	filterOnce(Iterator src, Object context) Wrap the source iterator with this filter.
protected abstract boolean	remove(ITuple<E> e) true iff the tuple should be removed from the source IIndex.

Methods inherited from class cutthecrap.utils.striterators.FilterBase

addFilter, filter, getProperty, getRequiredProperty, setProperty, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface cutthecrap.utils.striterators.IFilter

filter

Methods inherited from interface cutthecrap.utils.striterators.IPropertySet

getProperty

Constructor Detail

TupleRemover

public TupleRemover()

Method Detail

filterOnce

public ITupleIterator<E> filterOnce(Iterator src,
                           Object context)

Description copied from class: FilterBase

Wrap the source iterator with this filter.

Specified by:

filterOnce in interface ITupleFilter<E>

Specified by:

filterOnce in class FilterBase

Parameters:

src - The source iterator.

context - The iterator evaluation context.

Returns:

The wrapped iterator.

remove

protected abstract boolean remove(ITuple<E> e)

true iff the tuple should be removed from the source IIndex.

Parameters:

e - The tuple.