public class ConcatenatingAxisIterator extends java.lang.Object implements AxisIterator
Constructor and Description |
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ConcatenatingAxisIterator(AxisIterator first,
AxisIterator second) |
Modifier and Type | Method and Description |
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void |
close()
Close the iterator.
|
NodeInfo |
next()
Get the next item in the sequence.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
discharge
public ConcatenatingAxisIterator(AxisIterator first, AxisIterator second)
public NodeInfo next()
next
in interface SequenceIterator
next
in interface AxisIterator
public void close()
SequenceIterator
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.
Closing an iterator is not necessary if the iterator is read to completion: if a call
on SequenceIterator.next()
returns null, the iterator will be closed automatically. An explicit
call on SequenceIterator.close()
is needed only when iteration is abandoned prematurely.
close
in interface java.io.Closeable
close
in interface java.lang.AutoCloseable
close
in interface SequenceIterator
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