it.unimi.dsi.fastutil.longs

Class AbstractLongBidirectionalIterator

java.lang.Object

it.unimi.dsi.fastutil.longs.AbstractLongIterator

it.unimi.dsi.fastutil.longs.AbstractLongBidirectionalIterator

All Implemented Interfaces:

BidirectionalIterator<Long>, LongBidirectionalIterator, LongIterator, ObjectBidirectionalIterator<Long>, ObjectIterator<Long>, Iterator<Long>

Direct Known Subclasses:

AbstractLong2ObjectSortedMap.KeySetIterator, AbstractLongListIterator, LongIterators.UnmodifiableBidirectionalIterator

public abstract class AbstractLongBidirectionalIterator
extends AbstractLongIterator
implements LongBidirectionalIterator

An abstract class facilitating the creation of type-specific bidirectional iterators.

To create a type-specific bidirectional iterator, besides what is needed for an iterator you need both a method returning the previous element as primitive type and a method returning the previous element as an object. However, if you inherit from this class you need just one (anyone).

This class implements also a trivial version of back(int) that uses type-specific methods.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractLongBidirectionalIterator()

Method Summary

Modifier and Type	Method and Description
int	back(int n) This method just iterates the type-specific version of previous() for at most n times, stopping if BidirectionalIterator.hasPrevious() becomes false.
Long	previous() Delegates to the corresponding type-specific method.
long	previousLong() Delegates to the corresponding generic method.

Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLongIterator

next, nextLong, remove, skip

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unimi.dsi.fastutil.longs.LongIterator

nextLong, skip

Methods inherited from interface it.unimi.dsi.fastutil.objects.ObjectIterator

skip

Methods inherited from interface it.unimi.dsi.fastutil.BidirectionalIterator

hasPrevious

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

Constructor Detail

AbstractLongBidirectionalIterator

protected AbstractLongBidirectionalIterator()

Method Detail

previousLong

public long previousLong()

Delegates to the corresponding generic method.

Specified by:

previousLong in interface LongBidirectionalIterator

Returns:

the previous element in the iteration.

See Also:

ListIterator.previous()

previous

public Long previous()

Delegates to the corresponding type-specific method.

Specified by:

previous in interface BidirectionalIterator<Long>

Returns:

the previous element from the collection.

See Also:

ListIterator.previous()

back

public int back(int n)

This method just iterates the type-specific version of previous() for at most n times, stopping if BidirectionalIterator.hasPrevious() becomes false.

Specified by:

back in interface LongBidirectionalIterator

Specified by:

back in interface ObjectBidirectionalIterator<Long>

Parameters:

n - the number of elements to skip back.

Returns:

the number of elements actually skipped.

See Also:

Iterator.next()