public final class ContextMappingIterator<T extends Item> extends java.lang.Object implements SequenceIterator
This is a specialization of the MappingIterator class: it differs in that it sets each item being processed as the context item
ATOMIZING, GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD
Constructor and Description |
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ContextMappingIterator(ContextMappingFunction action,
XPathContext context)
Construct a ContextMappingIterator that will apply a specified ContextMappingFunction to
each Item returned by the base iterator.
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Modifier and Type | Method and Description |
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void |
close()
Close the iterator.
|
int |
getProperties()
Get properties of this iterator, as a bit-significant integer.
|
Item |
next()
Get the next item in the sequence.
|
public ContextMappingIterator(ContextMappingFunction action, XPathContext context)
action
- the mapping function to be appliedcontext
- the processing context. The mapping function is applied to each item returned
by context.getCurrentIterator() in turn.public Item next() throws XPathException
SequenceIterator
next
in interface SequenceIterator
XPathException
- if an error occurs retrieving the next itempublic void close()
SequenceIterator
(Currently, closing an iterator is important only 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.)
close
in interface SequenceIterator
public int getProperties()
getProperties
in interface SequenceIterator
SequenceIterator.GROUNDED
, SequenceIterator.LAST_POSITION_FINDER
,
and SequenceIterator.LOOKAHEAD
. It is always
acceptable to return the value zero, indicating that there are no known special properties.
It is acceptable for the properties of the iterator to change depending on its state.Copyright (c) 2004-2018 Saxonica Limited. All rights reserved.