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java.lang.Objectnet.sf.saxon.tree.wrapper.VirtualCopy.VirtualCopier
protected class VirtualCopy.VirtualCopier
VirtualCopier implements the XPath axes as applied to a VirtualCopy node. It works by applying the requested axis to the node of which this is a copy. There are two complications: firstly, all nodes encountered must themselves be (virtually) copied to give them a new identity. Secondly, axes that stray outside the subtree rooted at the original copied node must be truncated.
| Field Summary | |
|---|---|
protected AxisIterator |
base
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protected NodeInfo |
subtreeRoot
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| Fields inherited from interface net.sf.saxon.om.SequenceIterator |
|---|
GROUNDED, LAST_POSITION_FINDER, LOOKAHEAD |
| Constructor Summary | |
|---|---|
VirtualCopy.VirtualCopier(AxisIterator base,
VirtualCopy parent,
NodeInfo subtreeRoot)
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| Method Summary | |
|---|---|
Value |
atomize()
Return the atomized value of the current node. |
void |
close()
Close the iterator. |
protected VirtualCopy |
createCopy(NodeInfo node,
NodeInfo root)
Method to create the virtual copy of a node encountered when navigating. |
NodeInfo |
current()
Get the current item in the sequence. |
AxisIterator |
getAnother()
Get another iterator over the same sequence of items, positioned at the start of the sequence |
int |
getProperties()
Get properties of this iterator, as a bit-significant integer. |
CharSequence |
getStringValue()
Return the string value of the current node. |
AxisIterator |
iterateAxis(byte axis,
NodeTest test)
Return an iterator over an axis, starting at the current node. |
boolean |
moveNext()
Move to the next node, without returning it. |
NodeInfo |
next()
Get the next item in the sequence. |
int |
position()
Get the current position |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
|---|
protected AxisIterator base
protected NodeInfo subtreeRoot
| Constructor Detail |
|---|
public VirtualCopy.VirtualCopier(AxisIterator base,
VirtualCopy parent,
NodeInfo subtreeRoot)
| Method Detail |
|---|
public boolean moveNext()
moveNext in interface AxisIteratorpublic NodeInfo next()
next in interface SequenceIteratornext in interface AxisIteratornext in interface UnfailingIteratorpublic NodeInfo current()
current in interface SequenceIteratorcurrent in interface AxisIteratorcurrent in interface UnfailingIteratorpublic int position()
position in interface SequenceIteratorposition in interface UnfailingIteratorpublic 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 AxisIterator iterateAxis(byte axis,
NodeTest test)
iterateAxis in interface AxisIteratoraxis - the axis to iterate over, using a constant such as
Axis.CHILDtest - a predicate to apply to the nodes before returning them.
NullPointerException - if there is no current node
public Value atomize()
throws XPathException
atomize in interface AxisIteratorNullPointerException - if there is no current node
XPathException - if the current node
cannot be atomized, for example because it is an element node with
element-only content.public CharSequence getStringValue()
getStringValue in interface AxisIteratorNullPointerException - if there is no current nodepublic AxisIterator getAnother()
getAnother in interface SequenceIteratorgetAnother in interface AxisIteratorgetAnother in interface UnfailingIteratorpublic int getProperties()
getProperties in interface SequenceIteratorSequenceIterator.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.
protected VirtualCopy createCopy(NodeInfo node,
NodeInfo root)
node - the node to be copiedroot - the root of the tree
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