Package net.sf.saxon.tree.iter
Class AtomizingIterator
java.lang.Object
net.sf.saxon.tree.iter.AtomizingIterator
- All Implemented Interfaces:
Closeable
,AutoCloseable
,SequenceIterator
AtomizingIterator returns the atomization of an underlying sequence supplied
as an iterator. We use a specialist class rather than a general-purpose
MappingIterator for performance, especially as the relationship of items
in the result sequence to those in the base sequence is often one-to-one.
This AtomizingIterator is capable of handling list-typed nodes whose atomized value
is a sequence of more than one item. When it is known that all input will be untyped,
an UntypedAtomizingIterator
is used in preference.
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Nested Class Summary
Nested classes/interfaces inherited from interface net.sf.saxon.om.SequenceIterator
SequenceIterator.Property
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Constructor Summary
ConstructorsConstructorDescriptionConstruct an AtomizingIterator that will atomize the values returned by the base iterator. -
Method Summary
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface net.sf.saxon.om.SequenceIterator
forEachOrFail, getProperties, materialize
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Constructor Details
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AtomizingIterator
Construct an AtomizingIterator that will atomize the values returned by the base iterator.- Parameters:
base
- the base iterator
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Method Details
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setRoleDiagnostic
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next
Description copied from interface:SequenceIterator
Get the next item in the sequence. This method changes the state of the iterator.- Specified by:
next
in interfaceSequenceIterator
- Returns:
- the next item, or null if there are no more items. Once a call on next() has returned null, no further calls should be made. The preferred action for an iterator if subsequent calls on next() are made is to return null again, and all implementations within Saxon follow this rule.
- Throws:
XPathException
- if an error occurs retrieving the next item
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close
public void close()Description copied from interface:SequenceIterator
Close the iterator. This indicates to the supplier of the data that the client does not require any more items to be delivered by the iterator. This may enable the supplier to release resources. After calling close(), no further calls on the iterator should be made; if further calls are made, the effect of such calls is undefined.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.
- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Specified by:
close
in interfaceSequenceIterator
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