org.apache.xpath.axes
Class ChildTestIterator

java.lang.Object
  |
  +--org.apache.xpath.Expression
        |
        +--org.apache.xpath.patterns.NodeTest
              |
              +--org.apache.xpath.axes.PredicatedNodeTest
                    |
                    +--org.apache.xpath.axes.LocPathIterator
                          |
                          +--org.apache.xpath.axes.BasicTestIterator
                                |
                                +--org.apache.xpath.axes.ChildTestIterator

Direct Known Subclasses:

AttributeIterator, KeyRefIterator, OneStepIterator, OneStepIteratorForward, UnionChildIterator

public class ChildTestIterator

extends BasicTestIterator

**For advanced use only** This class implements an optimized iterator for children patterns that have a node test, and possibly a predicate.

See Also:

org.apache.xpath.axes.WalkerFactory#newLocPathIterator, Serialized Form

Fields inherited from class org.apache.xpath.axes.LocPathIterator

m_lastFetched

Fields inherited from class org.apache.xpath.patterns.NodeTest

SCORE_NODETEST, SCORE_NONE, SCORE_NSWILD, SCORE_OTHER, SCORE_QNAME, SHOW_BYFUNCTION, SUPPORTS_PRE_STRIPPING, WILD

Constructor Summary

ChildTestIterator(DTMAxisTraverser traverser)
Create a ChildTestIterator object.

Method Summary

DTMIterator	cloneWithReset() Get a cloned Iterator that is reset to the beginning of the query.
void	detach() Detaches the iterator from the set which it iterated over, releasing any computational resources and placing the iterator in the INVALID state.
int	getAxis() Returns the axis being iterated, if it is known.
void	setRoot(int context, java.lang.Object environment) Initialize the context values for this expression after it is cloned.

Methods inherited from class org.apache.xpath.axes.BasicTestIterator

nextNode

Methods inherited from class org.apache.xpath.axes.LocPathIterator

allowDetachToRelease, asIterator, asNode, bool, callVisitors, execute, executeCharsToContentHandler, getAnalysisBits, 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, size

Methods inherited from class org.apache.xpath.axes.PredicatedNodeTest

acceptNode, callPredicateVisitors, canTraverseOutsideSubtree, clone, deepEquals, fixupVariables, getLocPathIterator, getPredicate, getPredicateCount, getPredicateIndex, getProximityPosition, getProximityPosition, initProximityPosition, isReverseAxes, resetProximityPositions, setLocPathIterator, setPredicateCount

Methods inherited from class org.apache.xpath.patterns.NodeTest

debugWhatToShow, execute, execute, getDefaultScore, getLocalName, getNamespace, getNodeTypeTest, getStaticScore, initNodeTest, initNodeTest, setLocalName, setNamespace, setStaticScore, setWhatToShow

Methods inherited from class org.apache.xpath.Expression

asIteratorRaw, assertion, error, execute, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isStableNumber, num, warn, xstr

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChildTestIterator

public ChildTestIterator(DTMAxisTraverser traverser)

Create a ChildTestIterator object.

Parameters:

traverser - Traverser that tells how the KeyIterator is to be handled.

Throws:

TransformerException -

Method Detail

cloneWithReset

public DTMIterator cloneWithReset()
                           throws java.lang.CloneNotSupportedException

Get a cloned Iterator that is reset to the beginning of the query.

Returns:

A cloned NodeIterator set of the start of the query.

Throws:

java.lang.CloneNotSupportedException -

Overrides:

cloneWithReset in class BasicTestIterator

setRoot

public void setRoot(int context,
                    java.lang.Object environment)

Initialize the context values for this expression after it is cloned.

Parameters:

execContext - The XPath runtime context for this transformation.

Overrides:

setRoot in class LocPathIterator

getAxis

public int getAxis()

Returns the axis being iterated, if it is known.

Returns:

Axis.CHILD, etc., or -1 if the axis is not known or is of multiple types.

Overrides:

getAxis in class LocPathIterator

detach

public void detach()

Detaches the iterator from the set which it iterated over, releasing any computational resources and placing the iterator in the INVALID state. Afterdetach has been invoked, calls to nextNode orpreviousNode will raise the exception INVALID_STATE_ERR.

Overrides:

detach in class LocPathIterator