net.cnri.repository.util

Class AbstractCloseableIterator<T>

java.lang.Object

net.cnri.repository.util.AbstractCloseableIterator<T>

Type Parameters:

T -

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.util.Iterator<T>, CloseableIterator<T>

Direct Known Subclasses:

FilteringCloseableIteratorWrapper, IteratorIncludingExcludingSets, MappingCloseableIteratorWrapper

public abstract class AbstractCloseableIterator<T>
extends java.lang.Object
implements CloseableIterator<T>

Skeletal implementation of CloseableIterator. Does not support null elements. Subclasses must implement the computeNext() method. Subclasses may implement the closeOnlyOnce() method.

Constructor Summary

Constructors

Constructor and Description
AbstractCloseableIterator()

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Calls closeOnlyOnce() only if the iterator has not already been closed.
boolean	hasNext() Returns true if the iteration has more elements.
T	next() Returns the next element in the iteration.
void	remove() Throws UnsupportedOperationException.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractCloseableIterator

public AbstractCloseableIterator()

Method Detail

hasNext

public boolean hasNext()

Returns true if the iteration has more elements. Will call close() if there are no more elements.

Specified by:

hasNext in interface java.util.Iterator<T>

next

public T next()

Returns the next element in the iteration. Throws NoSuchElementException if the iteration has no more elements. Will call close() if there are no more elements.

Specified by:

next in interface java.util.Iterator<T>

remove

public void remove()

Throws UnsupportedOperationException.

Specified by:

remove in interface java.util.Iterator<T>

close

public void close()

Calls closeOnlyOnce() only if the iterator has not already been closed.

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface CloseableIterator<T>