UnionIterator (Eclipse RDF4J 4.2.4)

java.lang.Object
- org.eclipse.rdf4j.common.iterator.AbstractCloseableIterator<E>
- - org.eclipse.rdf4j.common.iterator.LookAheadIterator<E>
  - - org.eclipse.rdf4j.common.iterator.UnionIterator<E>

All Implemented Interfaces:

Closeable, AutoCloseable, Iterator<E>
```
public class UnionIterator<E>
extends LookAheadIterator<E>
```
Author:

MJAHale

Constructor Summary

Constructors
Constructor	Description
`UnionIterator(Iterable<? extends E>... args)`	Creates a new UnionIterator that returns the bag union of the results of a number of Iterators.
`UnionIterator(Iterable<? extends Iterable<? extends E>> args)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected E`	`getNextElement()`	Gets the next element.
`protected void`	`handleClose()`	Called by `AbstractCloseableIterator.close()` when it is called for the first time.

Methods inherited from class org.eclipse.rdf4j.common.iterator.LookAheadIterator
handleAlreadyClosed, hasNext, next, remove

Methods inherited from class org.eclipse.rdf4j.common.iterator.AbstractCloseableIterator
close, isClosed

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
  - UnionIterator
```
public UnionIterator(Iterable<? extends E>... args)
```
    Creates a new UnionIterator that returns the bag union of the results of a number of Iterators.
    
    Parameters:
    
    args - The Iterators containing the elements to iterate over.
  - UnionIterator
```
public UnionIterator(Iterable<? extends Iterable<? extends E>> args)
```
- Method Detail
  - getNextElement
```
protected E getNextElement()
```
    Description copied from class: LookAheadIterator
    
    Gets the next element. Subclasses should implement this method so that it returns the next element.
    
    Specified by:
    
    getNextElement in class LookAheadIterator<E>
    
    Returns:
    
    The next element, or null if no more elements are available.
  - handleClose
```
protected void handleClose()
                    throws IOException
```
    Description copied from class: AbstractCloseableIterator
    
    Called by AbstractCloseableIterator.close() when it is called for the first time. This method is only called once on each iteration. By default, this method does nothing.
    
    Overrides:
    
    handleClose in class LookAheadIterator<E>
    
    Throws:
    
    IOException