org.apache.xalan.xsltc.dom

Class MultiValuedNodeHeapIterator

public abstract class MultiValuedNodeHeapIterator extends DTMAxisIteratorBase

MultiValuedNodeHeapIterator takes a set of multi-valued heap nodes and produces a merged NodeSet in document order with duplicates removed.

Each multi-valued heap node (which might be a DTMAxisIterator, but that's not necessary) generates DTM node handles in document order. The class maintains the multi-valued heap nodes in a heap, not surprisingly, sorted by the next DTM node handle available form the heap node.

After a DTM node is pulled from the heap node that's at the top of the heap, the heap node is advanced to the next DTM node handle it makes available, and the heap nature of the heap is restored to ensure the next DTM node handle pulled is next in document order overall.

Author: Jacek Ambroziak Santiago Pericas-Geertsen

Nested Class Summary
abstract classMultiValuedNodeHeapIterator.HeapNode
An abstract representation of a set of nodes that will be retrieved in document order.
Method Summary
DTMAxisIteratorcloneIterator()
voidgotoMark()
intnext()
DTMAxisIteratorreset()
voidsetMark()
DTMAxisIteratorsetStartNode(int node)

Method Detail

cloneIterator

public DTMAxisIterator cloneIterator()

gotoMark

public void gotoMark()

next

public int next()

reset

public DTMAxisIterator reset()

setMark

public void setMark()

setStartNode

public DTMAxisIterator setStartNode(int node)
Copyright B) 2006 Apache XML Project. All Rights Reserved.