public class DifferenceEnumeration extends java.lang.Object implements SequenceIterator
|Constructor and Description|
Form an enumeration of the difference of two nodesets, that is, the nodes that are in p1 and that are not in p2.
|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 DifferenceEnumeration(SequenceIterator p1, SequenceIterator p2, ItemOrderComparer comparer) throws XPathException
p1- the first operand, with nodes delivered in document order
p2- the second operand, with nodes delivered in document order
comparer- the comparer
XPathException- if a failure occurs reading from either input sequence
public NodeInfo next() throws XPathException
XPathException- if an error occurs retrieving the next item
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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