public class FilterExprWalker extends AxesWalker
SCORE_NODETEST, SCORE_NONE, SCORE_NSWILD, SCORE_OTHER, SCORE_QNAME, SHOW_BYFUNCTION, SUPPORTS_PRE_STRIPPING, WILD| Constructor and Description |
|---|
FilterExprWalker(WalkingIterator locPathIterator)
Construct a FilterExprWalker using a LocPathIterator.
|
| Modifier and Type | Method and Description |
|---|---|
short |
acceptNode(int n)
This method needs to override AxesWalker.acceptNode because FilterExprWalkers
don't need to, and shouldn't, do a node test.
|
void |
callPredicateVisitors(XPathVisitor visitor)
This will traverse the heararchy, calling the visitor for
each member.
|
java.lang.Object |
clone()
Get a cloned FilterExprWalker.
|
boolean |
deepEquals(Expression expr)
Compare this object with another object and see
if they are equal, include the sub heararchy.
|
void |
detach()
Detaches the walker from the set which it iterated over, releasing
any computational resources and placing the iterator in the INVALID
state.
|
void |
fixupVariables(java.util.Vector vars,
int globalsSize)
This function is used to fixup variables from QNames to stack frame
indexes at stylesheet build time.
|
int |
getAnalysisBits()
Get the analysis bits for this walker, as defined in the WalkerFactory.
|
int |
getAxis()
Returns the axis being iterated, if it is known.
|
Expression |
getInnerExpression()
Get the inner contained expression of this filter.
|
int |
getLastPos(XPathContext xctxt)
Get the index of the last node that can be itterated to.
|
int |
getNextNode()
Moves the
TreeWalker to the next visible node in document
order relative to the current node, and returns the new node. |
void |
init(Compiler compiler,
int opPos,
int stepType)
Init a FilterExprWalker.
|
boolean |
isDocOrdered()
Returns true if all the nodes in the iteration well be returned in document
order.
|
void |
setInnerExpression(Expression expr)
Set the inner contained expression of this filter.
|
void |
setRoot(int root)
Set the root node of the TreeWalker.
|
callVisitors, getCurrentNode, getDTM, getExpression, getNextWalker, getPrevWalker, getRoot, nextNode, setDefaultDTM, setExpression, setNextWalker, setPrevWalker, wicanTraverseOutsideSubtree, getLocPathIterator, getPredicate, getPredicateCount, getPredicateIndex, getProximityPosition, getProximityPosition, initProximityPosition, isReverseAxes, resetProximityPositions, setLocPathIterator, setPredicateCountdebugWhatToShow, execute, execute, execute, getDefaultScore, getLocalName, getNamespace, getNodeTypeTest, getStaticScore, getWhatToShow, initNodeTest, initNodeTest, setLocalName, setNamespace, setStaticScore, setWhatToShowasIterator, asIteratorRaw, asNode, assertion, bool, error, execute, executeCharsToContentHandler, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isNodesetExpr, isStableNumber, num, warn, xstrpublic FilterExprWalker(WalkingIterator locPathIterator)
locPathIterator - non-null reference to the parent iterator.public void init(Compiler compiler, int opPos, int stepType) throws javax.xml.transform.TransformerException
init in class AxesWalkercompiler - non-null reference to the Compiler that is constructing.opPos - positive opcode position for this step.stepType - The type of step.javax.xml.transform.TransformerExceptionpublic void detach()
detach in class AxesWalkerpublic void setRoot(int root)
setRoot in class AxesWalkerroot - non-null reference to the root, or starting point of
the query.public java.lang.Object clone()
throws java.lang.CloneNotSupportedException
clone in class AxesWalkerjava.lang.CloneNotSupportedExceptionpublic short acceptNode(int n)
acceptNode in class PredicatedNodeTestn - The node to check to see if it passes the filter or not.public int getNextNode()
TreeWalker to the next visible node in document
order relative to the current node, and returns the new node. If the
current node has no next node, or if the search for nextNode attempts
to step upward from the TreeWalker's root node, returns
null , and retains the current node.null if the current node has no
next node in the TreeWalker's logical view.public int getLastPos(XPathContext xctxt)
getLastPos in interface SubContextListgetLastPos in class AxesWalkerxctxt - XPath runtime context.public void fixupVariables(java.util.Vector vars,
int globalsSize)
fixupVariables in class PredicatedNodeTestvars - List of QNames that correspond to variables. This list
should be searched backwards for the first qualified name that
corresponds to the variable reference qname. The position of the
QName in the vector from the start of the vector will be its position
in the stack frame (but variables above the globalsTop value will need
to be offset to the current stack frame).public Expression getInnerExpression()
public void setInnerExpression(Expression expr)
public int getAnalysisBits()
getAnalysisBits in interface PathComponentgetAnalysisBits in class AxesWalkerpublic boolean isDocOrdered()
isDocOrdered in class AxesWalkerpublic int getAxis()
getAxis in class AxesWalkerpublic void callPredicateVisitors(XPathVisitor visitor)
callPredicateVisitors in class PredicatedNodeTestvisitor - The visitor whose appropriate method will be called.public boolean deepEquals(Expression expr)
ExpressiondeepEquals in class AxesWalkerexpr - Another expression object.Expression.deepEquals(Expression)Copyright © 2023 Apache XML Project. All Rights Reserved.