org.ametys.plugins.repository

Class CollatingUniqueAmetysObjectIterable.CollatingIterator

java.lang.Object

org.ametys.plugins.repository.CollatingUniqueAmetysObjectIterable.CollatingIterator

All Implemented Interfaces:

Iterator<A>, AmetysObjectIterator<A>

Enclosing class:

CollatingUniqueAmetysObjectIterable<A extends AmetysObject>

class CollatingUniqueAmetysObjectIterable.CollatingIterator
extends Object
implements AmetysObjectIterator<A>

Field Summary

Fields

Modifier and Type	Field and Description
private Set<String>	_identifiers The already resolved identifiers.
private int	_itCount The iterable count.
private List<AmetysObjectIterator<A>>	_its
private ArrayList<A>	_nextObjects Next objects peeked from each iterator.
private BitSet	_nextObjectSet Whether or not each object has been prefetched.
private long	_position The current position in the iterator.
private long	_size

Constructor Summary

Constructors

Constructor and Description
CollatingIterator(List<AmetysObjectIterator<A>> its, long size)

Method Summary

Modifier and Type	Method and Description
private void	_clear(int iterableIndex) Clears the _nextObjects and _nextObjectSet attributes at position i.
private void	_initialize() Initializes the collating state if it hasn't been already.
private int	_least() Returns the index of the least element in _nextObjects, setting any uninitialized values.
private boolean	_setNextObject(int iterableIndex) Sets the _nextObjects and _nextObjectSet attributes at position i to the next value of the iterator at position i, or clear them if the ith iterator has no next value.
long	getPosition() Returns the current position within the iterator.
long	getSize() Returns the number of elements in the iterator.
boolean	hasNext()
A	next()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.ametys.plugins.repository.AmetysObjectIterator

skip

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Field Detail

_position

private long _position

The current position in the iterator.

_nextObjects

private ArrayList<A extends AmetysObject> _nextObjects

Next objects peeked from each iterator.

_nextObjectSet

private BitSet _nextObjectSet

Whether or not each object has been prefetched.

_identifiers

private Set<String> _identifiers

The already resolved identifiers.

_itCount

private int _itCount

The iterable count.

_its

private List<AmetysObjectIterator<A extends AmetysObject>> _its

_size

private long _size

Constructor Detail

CollatingIterator

public CollatingIterator(List<AmetysObjectIterator<A>> its,
                         long size)

Method Detail

getPosition

public long getPosition()

Description copied from interface: AmetysObjectIterator

Returns the current position within the iterator. The number returned is the 0-based index of the next element in the iterator, i.e. the one that will be returned on the subsequent next call.
Note that this method does not check if there is a next element, i.e. an empty iterator will always return 0.

Specified by:

getPosition in interface AmetysObjectIterator<A extends AmetysObject>

Returns:

a long

getSize

public long getSize()

Description copied from interface: AmetysObjectIterator

Returns the number of elements in the iterator. If this information is unavailable, returns -1.

Specified by:

getSize in interface AmetysObjectIterator<A extends AmetysObject>

Returns:

a long

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<A extends AmetysObject>

next

public A next()
       throws NoSuchElementException

Specified by:

next in interface Iterator<A extends AmetysObject>

Throws:

NoSuchElementException

_initialize

private void _initialize()

Initializes the collating state if it hasn't been already.

_setNextObject

private boolean _setNextObject(int iterableIndex)

Sets the _nextObjects and _nextObjectSet attributes at position i to the next value of the iterator at position i, or clear them if the i^th iterator has no next value.

Parameters:

iterableIndex - The index to get in _iterables

Returns:

false if there was no value to set

_clear

private void _clear(int iterableIndex)

Clears the _nextObjects and _nextObjectSet attributes at position i.

Parameters:

iterableIndex - The index to clear in _iterables

_least

private int _least()

Returns the index of the least element in _nextObjects, setting any uninitialized values.

Returns:

the index of the least element

Throws:

IllegalStateException - if an error occurred