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java.lang.Objectorg.apache.jackrabbit.commons.iterator.RangeIteratorAdapter
public class RangeIteratorAdapter
Adapter for turning normal Iterator
s into RangeIterator
s.
This helper class is used by the adapter classes in this package to
implement the JCR iterator interfaces on top of normal Java iterators.
Field Summary | |
---|---|
static RangeIterator |
EMPTY
Static instance of an empty RangeIterator . |
Constructor Summary | |
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RangeIteratorAdapter(Collection collection)
Creates a RangeIterator for the given collection. |
|
RangeIteratorAdapter(Iterator iterator)
Creates an adapter for the given iterator of unknown size. |
|
RangeIteratorAdapter(Iterator iterator,
long size)
Creates an adapter for the given iterator of the given size. |
Method Summary | |
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long |
getPosition()
Returns the current position of the iterator. |
long |
getSize()
Returns the size of the iterator. |
boolean |
hasNext()
Checks if this iterator has more elements. |
Object |
next()
Returns the next element in this iterator and advances the iterator position. |
void |
remove()
Removes the previously retrieved element. |
void |
skip(long n)
Skips the given number of elements. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final RangeIterator EMPTY
RangeIterator
.
Constructor Detail |
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public RangeIteratorAdapter(Iterator iterator, long size)
iterator
- adapted iteratorsize
- size of the iterator, or -1 if unknownpublic RangeIteratorAdapter(Iterator iterator)
iterator
- adapted iteratorpublic RangeIteratorAdapter(Collection collection)
RangeIterator
for the given collection.
collection
- the collection to iterateMethod Detail |
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public long getPosition()
getPosition
in interface RangeIterator
public long getSize()
getSize
in interface RangeIterator
public void skip(long n) throws IllegalArgumentException, NoSuchElementException
skip
in interface RangeIterator
n
- number of elements to skip
IllegalArgumentException
- if n is negative
NoSuchElementException
- if skipped past the last elementpublic boolean hasNext()
hasNext
in interface Iterator
true
if this iterator has more elements,
false
otherwisepublic Object next() throws NoSuchElementException
next
in interface Iterator
NoSuchElementException
- if there are no more elementspublic void remove() throws UnsupportedOperationException, IllegalStateException
remove
in interface Iterator
UnsupportedOperationException
- if removes are not permitted
IllegalStateException
- if there is no previous element to remove
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