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java.lang.Objectorg.apache.commons.collections.iterators.ListIteratorWrapper
public class ListIteratorWrapper
Converts an iterator into a list iterator by caching the returned entries.
The ListIterator interface has additional useful methods
for navigation - previous() and the index methods.
This class allows a regular Iterator to behave as a
ListIterator. It achieves this by building a list internally
of as the underlying iterator is traversed.
The optional operations of ListIterator are not supported.
This class implements ResettableListIterator from Commons Collections 3.2.
| Constructor Summary | |
|---|---|
ListIteratorWrapper(java.util.Iterator iterator)
Constructs a new ListIteratorWrapper that will wrap
the given iterator. |
|
| Method Summary | |
|---|---|
void |
add(java.lang.Object obj)
Throws UnsupportedOperationException. |
boolean |
hasNext()
Returns true if there are more elements in the iterator. |
boolean |
hasPrevious()
Returns true if there are previous elements in the iterator. |
java.lang.Object |
next()
Returns the next element from the iterator. |
int |
nextIndex()
Returns in the index of the next element. |
java.lang.Object |
previous()
Returns the the previous element. |
int |
previousIndex()
Returns the index of the previous element. |
void |
remove()
Throws UnsupportedOperationException. |
void |
reset()
Resets this iterator back to the position at which the iterator was created. |
void |
set(java.lang.Object obj)
Throws UnsupportedOperationException. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public ListIteratorWrapper(java.util.Iterator iterator)
ListIteratorWrapper that will wrap
the given iterator.
iterator - the iterator to wrap
java.lang.NullPointerException - if the iterator is null| Method Detail |
|---|
public void add(java.lang.Object obj)
throws java.lang.UnsupportedOperationException
UnsupportedOperationException.
add in interface java.util.ListIteratorobj - the object to add, ignored
java.lang.UnsupportedOperationException - alwayspublic boolean hasNext()
hasNext in interface java.util.IteratorhasNext in interface java.util.ListIteratorpublic boolean hasPrevious()
hasPrevious in interface java.util.ListIterator
public java.lang.Object next()
throws java.util.NoSuchElementException
next in interface java.util.Iteratornext in interface java.util.ListIteratorjava.util.NoSuchElementException - if there are no more elementspublic int nextIndex()
nextIndex in interface java.util.ListIterator
public java.lang.Object previous()
throws java.util.NoSuchElementException
previous in interface java.util.ListIteratorjava.util.NoSuchElementException - if there are no previous elementspublic int previousIndex()
previousIndex in interface java.util.ListIterator
public void remove()
throws java.lang.UnsupportedOperationException
UnsupportedOperationException.
remove in interface java.util.Iteratorremove in interface java.util.ListIteratorjava.lang.UnsupportedOperationException - always
public void set(java.lang.Object obj)
throws java.lang.UnsupportedOperationException
UnsupportedOperationException.
set in interface java.util.ListIteratorobj - the object to set, ignored
java.lang.UnsupportedOperationException - alwayspublic void reset()
reset in interface ResettableIteratorreset in interface ResettableListIterator
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