net.sf.saxon.expr
public final class MappingIterator extends Object implements SequenceIterator
This is a powerful class. It is used, with different mapping functions, in a great variety of ways. It underpins the way that "for" expressions and path expressions are evaluated, as well as sequence expressions. It is also used in the implementation of the document(), key(), and id() functions.
Constructor Summary | |
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MappingIterator(SequenceIterator base, MappingFunction action)
Construct a MappingIterator that will apply a specified MappingFunction to
each Item returned by the base iterator. |
Method Summary | |
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void | close() |
Item | current() |
SequenceIterator | getAnother() |
int | getProperties()
Get properties of this iterator, as a bit-significant integer.
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Item | next() |
int | position() |
Parameters: base the base iterator action the mapping function to be applied
Returns: the properties of this iterator. This will be some combination of properties such as GROUNDED, LAST_POSITION_FINDER, and 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.