|Constructor and Description|
Create an iterator over the distinct values in a sequence
|Modifier and Type||Method and Description|
Close the iterator.
Get the next item in the sequence.
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public DistinctIterator(SequenceIterator base, StringCollator collator, XPathContext context)
base- the input sequence. This must return atomic values only.
collator- The comparer used to obtain comparison keys from each value; these comparison keys are themselves compared using equals().
context- the XPath dynamic context
public AtomicValue next() throws XPathException
public void close()
For example, the iterator returned by the unparsed-text-lines() function has a close() method that causes the underlying input stream to be closed, whether or not the file has been read to completion.
Closing an iterator is important when the data is being "pushed" in another thread. Closing the iterator terminates that thread and means that it needs to do no additional work. Indeed, failing to close the iterator may cause the push thread to hang waiting for the buffer to be emptied.
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