net.sf.saxon.expr.sort

Class GroupByIterator.ManualGroupByIterator

java.lang.Object

net.sf.saxon.tree.iter.ManualIterator

com.saxonica.ee.stream.ManualGroupIterator

net.sf.saxon.expr.sort.GroupByIterator.ManualGroupByIterator

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, LastPositionFinder, GroupIterator, FocusIterator, SequenceIterator, GroundedIterator, LookaheadIterator, ReversibleIterator

Enclosing class:

GroupByIterator

public static class GroupByIterator.ManualGroupByIterator
extends ManualGroupIterator

Constructor Summary

Constructors

Constructor and Description
ManualGroupByIterator(java.util.List<java.util.List<Item>> groups, java.util.List<AtomicSequence> groupKeys, int position)

Method Summary

Modifier and Type	Method and Description
AtomicSequence	getCurrentGroupingKey() Get the grouping key of the current group
int	getLength() Get the position of the last item in the sequence
SequenceIterator	iterateCurrentGroup() Get an iterator over the members of the current group, in population order.

Methods inherited from class com.saxonica.ee.stream.ManualGroupIterator

appendToCurrentGroup, currentGroupContains, getSnapShot, setCurrentGroup, setCurrentGroupingKey, startNewCurrentGroup

Methods inherited from class net.sf.saxon.tree.iter.ManualIterator

current, getResidue, getReverseIterator, hasNext, incrementPosition, isActuallyGrounded, materialize, next, position, setContextItem, setLengthFinder, setPosition, supportsGetLength, supportsHasNext

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

close, discharge, next

Constructor Detail

ManualGroupByIterator

public ManualGroupByIterator(java.util.List<java.util.List<Item>> groups,
                             java.util.List<AtomicSequence> groupKeys,
                             int position)

Method Detail

iterateCurrentGroup

public SequenceIterator iterateCurrentGroup()

Description copied from interface: GroupIterator

Get an iterator over the members of the current group, in population order. This must always be a clean iterator, that is, an iterator that starts at the first item of the group.

Specified by:

iterateCurrentGroup in interface GroupIterator

Overrides:

iterateCurrentGroup in class ManualGroupIterator

Returns:

an iterator over all the members of the current group, in population order.

getCurrentGroupingKey

public AtomicSequence getCurrentGroupingKey()

Description copied from interface: GroupIterator

Get the grouping key of the current group

Specified by:

getCurrentGroupingKey in interface GroupIterator

Overrides:

getCurrentGroupingKey in class ManualGroupIterator

Returns:

the current grouping key in the case of group-by or group-adjacent, or null in the case of group-starting-with and group-ending-with

getLength

public int getLength()

Description copied from interface: FocusIterator

Get the position of the last item in the sequence

Specified by:

getLength in interface LastPositionFinder

Specified by:

getLength in interface FocusIterator

Overrides:

getLength in class ManualIterator

Returns:

the position of the last item