Package org.apache.xalan.xsltc.dom
Class StepIterator
- java.lang.Object
-
- org.apache.xml.dtm.ref.DTMAxisIteratorBase
-
- org.apache.xalan.xsltc.dom.StepIterator
-
- All Implemented Interfaces:
java.lang.Cloneable
,DTMAxisIterator
- Direct Known Subclasses:
FilteredStepIterator
public class StepIterator extends DTMAxisIteratorBase
A step iterator is used to evaluate expressions like "BOOK/TITLE". A better name for this iterator would have been ParentIterator since both "BOOK" and "TITLE" are steps in XPath lingo. Step iterators are constructed from two other iterators which we are going to refer to as "outer" and "inner". Every node from the outer iterator (the one for BOOK in our example) is used to initialize the inner iterator. After this initialization, every node from the inner iterator is returned (in essence, implementing a "nested loop").- Author:
- Jacek Ambroziak, Santiago Pericas-Geertsen, Erwin Bolwidt
, Morten Jorgensen
-
-
Field Summary
-
Fields inherited from interface org.apache.xml.dtm.DTMAxisIterator
END
-
-
Constructor Summary
Constructors Constructor Description StepIterator(DTMAxisIterator source, DTMAxisIterator iterator)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description DTMAxisIterator
cloneIterator()
Returns a deep copy of this iterator.void
gotoMark()
Restores the current node remembered by setMark().int
next()
Get the next node in the iteration.DTMAxisIterator
reset()
Resets the iterator to the last start node.void
setMark()
Remembers the current node for the next call to gotoMark().void
setRestartable(boolean isRestartable)
Set if restartable.DTMAxisIterator
setStartNode(int node)
Set start to END should 'close' the iterator, i.e. subsequent call to next() should return END.-
Methods inherited from class org.apache.xml.dtm.ref.DTMAxisIteratorBase
getAxis, getLast, getNodeByPosition, getPosition, getStartNode, includeSelf, isDocOrdered, isReverse
-
-
-
-
Constructor Detail
-
StepIterator
public StepIterator(DTMAxisIterator source, DTMAxisIterator iterator)
-
-
Method Detail
-
setRestartable
public void setRestartable(boolean isRestartable)
Description copied from interface:DTMAxisIterator
Set if restartable.- Specified by:
setRestartable
in interfaceDTMAxisIterator
- Overrides:
setRestartable
in classDTMAxisIteratorBase
-
cloneIterator
public DTMAxisIterator cloneIterator()
Description copied from class:DTMAxisIteratorBase
Returns a deep copy of this iterator. Cloned iterators may not be restartable. The iterator being cloned may or may not become non-restartable as a side effect of this operation.- Specified by:
cloneIterator
in interfaceDTMAxisIterator
- Overrides:
cloneIterator
in classDTMAxisIteratorBase
- Returns:
- a deep copy of this iterator.
-
setStartNode
public DTMAxisIterator setStartNode(int node)
Description copied from interface:DTMAxisIterator
Set start to END should 'close' the iterator, i.e. subsequent call to next() should return END.- Parameters:
node
- Sets the root of the iteration.- Returns:
- A DTMAxisIterator set to the start of the iteration.
-
reset
public DTMAxisIterator reset()
Description copied from interface:DTMAxisIterator
Resets the iterator to the last start node.- Specified by:
reset
in interfaceDTMAxisIterator
- Overrides:
reset
in classDTMAxisIteratorBase
- Returns:
- A DTMAxisIterator which has been reset to the start node, which may or may not be the same as this iterator.
-
next
public int next()
Description copied from interface:DTMAxisIterator
Get the next node in the iteration.- Returns:
- The next node handle in the iteration, or END.
-
setMark
public void setMark()
Description copied from interface:DTMAxisIterator
Remembers the current node for the next call to gotoMark().
-
gotoMark
public void gotoMark()
Description copied from interface:DTMAxisIterator
Restores the current node remembered by setMark().
-
-