org.apache.xpath.axes
Class SelfIteratorNoPredicate

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.SelfIteratorNoPredicate

All Implemented Interfaces:

Cloneable, DTMIterator, ExpressionNode, PathComponent, Serializable, javax.xml.transform.SourceLocator, SubContextList, XPathVisitable

public class SelfIteratorNoPredicate

extends LocPathIterator

This class implements an optimized iterator for "." patterns, that is, the self axes without any predicates.

See Also:

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

Nested Class Summary

Nested classes inherited from class org.apache.xpath.axes.PredicatedNodeTest

PredicatedNodeTest.PredOwner

Field Summary

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

m_allowDetach, m_cdtm, m_clones, m_context, m_currentContextNode, m_execContext, m_lastFetched, m_length, m_pos, m_stackFrame

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

DEBUG_PREDICATECOUNTING, m_foundLast, m_lpi, m_predCount, m_predicateIndex, m_proximityPositions

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

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

Fields inherited from class org.apache.xpath.Expression

Fields inherited from interface org.apache.xml.dtm.DTMIterator

FILTER_ACCEPT, FILTER_REJECT, FILTER_SKIP

Constructor Summary

	SelfIteratorNoPredicate() Create a SelfIteratorNoPredicate object.
(package private)	SelfIteratorNoPredicate(Compiler compiler, int opPos, int analysis) Create a SelfIteratorNoPredicate object.

Method Summary

int	asNode(XPathContext xctxt) Return the first node out of the nodeset, if this expression is a nodeset expression.
int	getLastPos(XPathContext xctxt) Get the index of the last node that can be itterated to.
int	nextNode() Returns the next node in the set and advances the position of the iterator in the set.

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

allowDetachToRelease, asIterator, bool, callVisitors, cloneWithReset, detach, execute, executeCharsToContentHandler, getAnalysisBits, getAxis, getContext, getCurrentContextNode, getCurrentNode, getCurrentPos, getDTM, getDTMManager, getExpandEntityReferences, getFilter, getFoundLast, getIsTopLevel, getLength, getPrefixResolver, getRoot, getWhatToShow, getXPathContext, incrementCurrentPos, isDocOrdered, isFresh, isMutable, isNodesetExpr, item, previousNode, reset, returnNextNode, runTo, setCurrentContextNode, setCurrentPos, setEnvironment, setIsTopLevel, setItem, setNextPosition, setRoot, setShouldCacheNodes, size

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

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

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

calcScore, 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, isSameClass, isStableNumber, num, warn, xstr

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.xml.dtm.DTMIterator

clone

Constructor Detail

SelfIteratorNoPredicate

SelfIteratorNoPredicate(Compiler compiler,
                        int opPos,
                        int analysis)
                  throws javax.xml.transform.TransformerException

Create a SelfIteratorNoPredicate object.

Parameters:

compiler - A reference to the Compiler that contains the op map.

opPos - The position within the op map, which contains the location path expression for this itterator.

analysis - Analysis bits.

Throws:

javax.xml.transform.TransformerException

SelfIteratorNoPredicate

public SelfIteratorNoPredicate()
                        throws javax.xml.transform.TransformerException

Create a SelfIteratorNoPredicate object.

Throws:

javax.xml.transform.TransformerException

Method Detail

nextNode

public int nextNode()

Returns the next node in the set and advances the position of the iterator in the set. After a NodeIterator is created, the first call to nextNode() returns the first node in the set.

Specified by:

nextNode in interface DTMIterator

Specified by:

nextNode in class LocPathIterator

Returns:

The next Node in the set being iterated over, or null if there are no more members in that set.

asNode

public int asNode(XPathContext xctxt)
           throws javax.xml.transform.TransformerException

Return the first node out of the nodeset, if this expression is a nodeset expression. This is the default implementation for nodesets. Derived classes should try and override this and return a value without having to do a clone operation.

Overrides:

asNode in class LocPathIterator

Parameters:

xctxt - The XPath runtime context.

Returns:

the first node out of the nodeset, or DTM.NULL.

Throws:

javax.xml.transform.TransformerException

getLastPos

public int getLastPos(XPathContext xctxt)

Get the index of the last node that can be itterated to. This probably will need to be overridded by derived classes.

Specified by:

getLastPos in interface SubContextList

Overrides:

getLastPos in class LocPathIterator

Parameters:

xctxt - XPath runtime context.

Returns:

the index of the last node that can be itterated to.

See Also:

PredicatedNodeTest.getLastPos(XPathContext)