org.rdfhdt.hdt.iterator.utils

Class SeveralIterator<K,T>

java.lang.Object

org.rdfhdt.hdt.iterator.utils.PrefetchIterator<T>

org.rdfhdt.hdt.iterator.utils.SeveralIterator<K,T>

Type Parameters:

K -

T -

All Implemented Interfaces:

Iterator<T>

public class SeveralIterator<K,T>
extends PrefetchIterator<T>

Receives an iterator of Keys, for each key it uses the IteratorGetter to get an iterator of values associated to that key. The output iterator goes through all values of all keys. The IteratorGetter returns an iterator given a specific key.

Author:

Mario Arias

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	SeveralIterator.IteratorGetter<K,T>

Field Summary

Fields inherited from class org.rdfhdt.hdt.iterator.utils.PrefetchIterator

next

Constructor Summary

Constructors

Constructor and Description
SeveralIterator(Iterator<K> input, SeveralIterator.IteratorGetter<K,T> getter)

Method Summary

Modifier and Type	Method and Description
protected T	prefetch() Reimplement this method to return an element on each call.

Methods inherited from class org.rdfhdt.hdt.iterator.utils.PrefetchIterator

hasNext, next, remove

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Detail

SeveralIterator

public SeveralIterator(Iterator<K> input,
                       SeveralIterator.IteratorGetter<K,T> getter)

Method Detail

prefetch

protected T prefetch()

Description copied from class: PrefetchIterator

Reimplement this method to return an element on each call. Return null, or throw a NoSuchElementException Exception when no more elements available.

Specified by:

prefetch in class PrefetchIterator<T>

Returns:

The element, or null when finished.