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Add LoopingListIterator 

bug 30166


git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/collections/trunk@131809 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne 2004-07-17 21:08:05 +00:00
parent 487621cb99
commit 7da91cadc4
1 changed files with 19 additions and 1 deletions
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20
src/java/org/apache/commons/collections/IteratorUtils.java
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@ -42,6 +42,7 @@ import org.apache.commons.collections.iterators.IteratorChain;
import org.apache.commons.collections.iterators.IteratorEnumeration;
import org.apache.commons.collections.iterators.ListIteratorWrapper;
import org.apache.commons.collections.iterators.LoopingIterator;
import org.apache.commons.collections.iterators.LoopingListIterator;
import org.apache.commons.collections.iterators.ObjectArrayIterator;
import org.apache.commons.collections.iterators.ObjectArrayListIterator;
import org.apache.commons.collections.iterators.ObjectGraphIterator;
@ -64,7 +65,7 @@ import org.apache.commons.collections.iterators.UnmodifiableMapIterator;
* against versions 2.1.1 and 3.1.
*
* @since Commons Collections 2.1
* @version $Revision: 1.27 $ $Date: 2004/05/26 21:53:46 $
* @version $Revision: 1.28 $ $Date: 2004/07/17 21:08:05 $
*
* @author Stephen Colebourne
* @author Phil Steitz
@ -685,6 +686,23 @@ public class IteratorUtils {
return new LoopingIterator(coll);
}
/**
* Gets an iterator that loops continuously over the supplied list.
* <p>
* The iterator will only stop looping if the remove method is called
* enough times to empty the list, or if the list is empty to start with.
*
* @param list the list to iterate over, not null
* @return a new looping iterator
* @throws NullPointerException if the list is null
*/
public static ResettableIterator loopingListIterator(List list) {
if (list == null) {
throw new NullPointerException("List must not be null");
}
return new LoopingListIterator(list);
}
// Views
//-----------------------------------------------------------------------
/**