public class UnionPathIterator extends LocPathIterator implements java.lang.Cloneable, DTMIterator, java.io.Serializable, PathComponent
m_lastFetchedSCORE_NODETEST, SCORE_NONE, SCORE_NSWILD, SCORE_OTHER, SCORE_QNAME, SHOW_BYFUNCTION, SUPPORTS_PRE_STRIPPING, WILDFILTER_ACCEPT, FILTER_REJECT, FILTER_SKIP| Constructor and Description |
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UnionPathIterator()
Constructor to create an instance which you can add location paths to.
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UnionPathIterator(Compiler compiler,
int opPos)
Create a UnionPathIterator object, including creation
of location path iterators from the opcode list, and call back
into the Compiler to create predicate expressions.
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| Modifier and Type | Method and Description |
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void |
addIterator(DTMIterator expr)
Add an iterator to the union list.
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void |
callVisitors(ExpressionOwner owner,
XPathVisitor visitor)
This will traverse the heararchy, calling the visitor for
each member.
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java.lang.Object |
clone()
Get a cloned LocPathIterator that holds the same
position as this iterator.
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static LocPathIterator |
createUnionIterator(Compiler compiler,
int opPos)
This will return an iterator capable of handling the union of paths given.
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boolean |
deepEquals(Expression expr)
Compare this object with another object and see
if they are equal, include the sub heararchy.
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void |
detach()
Detaches the iterator from the set which it iterated over, releasing
any computational resources and placing the iterator in the INVALID
state.
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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.
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int |
getAnalysisBits()
Get the analysis bits for this walker, as defined in the WalkerFactory.
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int |
getAxis()
Returns the axis being iterated, if it is known.
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int |
nextNode()
Returns the next node in the set and advances the position of the
iterator in the set.
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void |
setRoot(int context,
java.lang.Object environment)
Initialize the context values for this expression
after it is cloned.
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allowDetachToRelease, asIterator, asNode, bool, cloneWithReset, execute, executeCharsToContentHandler, getContext, getCurrentContextNode, getCurrentNode, getCurrentPos, getDTM, getDTMManager, getExpandEntityReferences, getFilter, getFoundLast, getIsTopLevel, getLastPos, getLength, getPrefixResolver, getRoot, getWhatToShow, getXPathContext, incrementCurrentPos, isDocOrdered, isFresh, isMutable, isNodesetExpr, item, previousNode, reset, runTo, setCurrentContextNode, setCurrentPos, setEnvironment, setIsTopLevel, setItem, setShouldCacheNodes, sizeacceptNode, callPredicateVisitors, canTraverseOutsideSubtree, getLocPathIterator, getPredicate, getPredicateCount, getPredicateIndex, getProximityPosition, getProximityPosition, initProximityPosition, isReverseAxes, resetProximityPositions, setLocPathIterator, setPredicateCountdebugWhatToShow, execute, execute, getDefaultScore, getLocalName, getNamespace, getNodeTypeTest, getStaticScore, initNodeTest, initNodeTest, setLocalName, setNamespace, setStaticScore, setWhatToShowasIteratorRaw, assertion, error, execute, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isStableNumber, num, warn, xstrequals, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitallowDetachToRelease, cloneWithReset, getCurrentNode, getCurrentPos, getDTM, getDTMManager, getExpandEntityReferences, getLength, getRoot, getWhatToShow, isDocOrdered, isFresh, isMutable, item, previousNode, reset, runTo, setCurrentPos, setItem, setShouldCacheNodespublic UnionPathIterator()
public UnionPathIterator(Compiler compiler, int opPos) throws javax.xml.transform.TransformerException
compiler - The Compiler which is creating
this expression.opPos - The position of this iterator in the
opcode list from the compiler.javax.xml.transform.TransformerExceptionpublic void setRoot(int context,
java.lang.Object environment)
setRoot in interface DTMIteratorsetRoot in class LocPathIteratorcontext - The XPath runtime context for this
transformation.environment - The environment object.
The environment in which this iterator operates, which should provide:
At this time the exact implementation of this environment is application dependent. Probably a proper interface will be created fairly soon.
public void addIterator(DTMIterator expr)
expr - non-null reference to a location path iterator.public void detach()
detach has been invoked, calls to
nextNode orpreviousNode will raise the
exception INVALID_STATE_ERR.detach in interface DTMIteratordetach in class LocPathIteratorpublic static LocPathIterator createUnionIterator(Compiler compiler, int opPos) throws javax.xml.transform.TransformerException
compiler - The Compiler which is creating
this expression.opPos - The position of this iterator in the
opcode list from the compiler.javax.xml.transform.TransformerExceptionpublic int getAnalysisBits()
getAnalysisBits in interface PathComponentgetAnalysisBits in class LocPathIteratorpublic java.lang.Object clone()
throws java.lang.CloneNotSupportedException
clone in interface DTMIteratorclone in class PredicatedNodeTestjava.lang.CloneNotSupportedExceptionpublic int nextNode()
nextNode in interface DTMIteratornextNode in class LocPathIteratorNode in the set being iterated over, or
null if there are no more members in that set.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 int getAxis()
getAxis in interface DTMIteratorgetAxis in class LocPathIteratorpublic void callVisitors(ExpressionOwner owner, XPathVisitor visitor)
XPathVisitablecallVisitors in interface XPathVisitablecallVisitors in class LocPathIteratorowner - The owner of the visitor, where that path may be
rewritten if needed.visitor - The visitor whose appropriate method will be called.XPathVisitable.callVisitors(ExpressionOwner, XPathVisitor)public boolean deepEquals(Expression expr)
ExpressiondeepEquals in class PredicatedNodeTestexpr - Another expression object.Expression.deepEquals(Expression)Copyright © 2023 Apache XML Project. All Rights Reserved.