com.bigdata.striterator

Class Resolver<I extends Iterator<E>,E,F>

java.lang.Object

com.bigdata.striterator.Resolver<I,E,F>

Type Parameters:

I - The generic type of the source iterator.

E - The generic type of the elements visited by the source iterator.

F - The generic type of the elements visited by the filtered iterator.

All Implemented Interfaces:

IFilter<I,E,F>, Serializable

public abstract class Resolver<I extends Iterator<E>,E,F>
extends Object
implements IFilter<I,E,F>

Pattern for resolving elements of an iterator.

Version:

$Id$

Author:

Bryan Thompson

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Resolver()
Resolver(int chunkSize, IKeyOrder<F> keyOrder)

Method Summary

Methods

Modifier and Type	Method and Description
IChunkedIterator<F>	filter(I src) Wrap the source iterator with an iterator that applies this filter.
protected abstract F	resolve(E e) Resolve an element visited by the source iterator into an element of the type visitable by this iterator.

Methods inherited from class java.lang.Object

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

Constructor Detail

Resolver

public Resolver()

Resolver

public Resolver(int chunkSize,
        IKeyOrder<F> keyOrder)

Parameters:

chunkSize - The chunk size to use if the source is not chunked.

keyOrder - The order for the resolved elements (optional).

Method Detail

filter

public IChunkedIterator<F> filter(I src)

Description copied from interface: IFilter

Wrap the source iterator with an iterator that applies this filter.

Specified by:

filter in interface IFilter<I extends Iterator<E>,E,F>

Parameters:

src - The source iterator.

Returns:

The filtered iterator.

resolve

protected abstract F resolve(E e)

Resolve an element visited by the source iterator into an element of the type visitable by this iterator.

Parameters:

e - An element visited by the source iterator.

Returns:

The element to be visited by this iterator.