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• java
• j2se
• 1.6
• com.sun.org.apache.xpath.internal.axes
• AxesWalker

Methods

• AxesWalkertop

  public AxesWalker(LocPathIterator locPathIterator, int axis)
  Construct an AxesWalker using a LocPathIterator.

  Parameters:

  @param locPathIterator non-null reference to the parent iterator.

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• callVisitorstop

  public void callVisitors(ExpressionOwner owner, XPathVisitor visitor)
  This will traverse the heararchy, calling the visitor for each member. If the called visitor method returns false, the subtree should not be called.

  Parameters:

  @param owner The owner of the visitor, where that path may be rewritten if needed.

  @param visitor The visitor whose appropriate method will be called.

  Specified by:

  callVisitors from XPathVisitable

  Override hierarchy:

  callVisitors from NodeTest

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• clonetop

  public Object clone() throws CloneNotSupportedException
  Get a cloned AxesWalker.

  Return:

  @return A new AxesWalker that can be used without mutating this one.

  Exceptions:

  @throws CloneNotSupportedException

  Override hierarchy:

  clone from PredicatedNodeTest

  clone from Object

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• cloneDeeptop

  AxesWalker cloneDeep(WalkingIterator cloneOwner, Vector cloneList) throws CloneNotSupportedException
  Do a deep clone of this walker, including next and previous walkers. If the this AxesWalker is on the clone list, don't clone but return the already cloned version.

  Parameters:

  @param cloneOwner non-null reference to the cloned location path iterator to which this clone will be added.

  @param cloneList non-null vector of sources in odd elements, and the corresponding clones in even vectors.

  Return:

  @return non-null clone, which may be a new clone, or may be a clone contained on the cloneList.

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• deepEqualstop

  public boolean deepEquals(Expression expr)
  Compare this object with another object and see if they are equal, include the sub heararchy.

  Parameters:

  @param expr Another expression object.

  Return:

  @return true if this objects class and the expr object's class are the same, and the data contained within both objects are considered equal.

  See:

  @see com.sun.org.apache.xpath.internal.Expression.deepEquals(com.sun.org.apache.xpath.internal.Expression)

  Override hierarchy:

  deepEquals from PredicatedNodeTest

  deepEquals from NodeTest

  deepEquals from Expression

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• detachtop

  public void detach()
  Detaches the walker from the set which it iterated over, releasing any computational resources and placing the iterator in the INVALID state.

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• findClonetop

  static AxesWalker findClone(AxesWalker key, Vector cloneList)
  Find a clone that corresponds to the key argument.

  Parameters:

  @param key The original AxesWalker for which there may be a clone.

  @param cloneList vector of sources in odd elements, and the corresponding clones in even vectors, may be null.

  Return:

  @return A clone that corresponds to the key, or null if key not found.

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• getAnalysisBitstop

  public int getAnalysisBits()
  Get the analysis bits for this walker, as defined in the WalkerFactory.

  Return:

  @return One of WalkerFactory#BIT_DESCENDANT, etc.

  Specified by:

  getAnalysisBits from PathComponent

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• getAxistop

  public int getAxis()
  Returns the axis being iterated, if it is known.

  Return:

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

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• getCurrentNodetop

  public final int getCurrentNode()
  The node at which the TreeWalker is currently positioned.
  The value must not be null. Alterations to the DOM tree may cause the current node to no longer be accepted by the TreeWalker's associated filter. currentNode may also be explicitly set to any node, whether or not it is within the subtree specified by the root node or would be accepted by the filter and whatToShow flags. Further traversal occurs relative to currentNode even if it is not part of the current view by applying the filters in the requested direction (not changing currentNode where no traversal is possible).

  Return:

  @return The node at which the TreeWalker is currently positioned, only null if setRoot has not yet been called.

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• getDTMtop

  public DTM getDTM(int node)
  Get the DTM for this walker.

  Return:

  @return Non-null reference to a DTM.

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• getExpressiontop

  public Expression getExpression()
  Get the raw Expression object that this class wraps.

  Return:

  @return the raw Expression object, which should not normally be null.

  See:

  @see com.sun.org.apache.xpath.internal.ExpressionOwner.getExpression()

  Specified by:

  getExpression from ExpressionOwner

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• getLastPostop

  public int getLastPos(XPathContext xctxt)
  Get the index of the last node that can be itterated to.

  Parameters:

  @param xctxt XPath runtime context.

  Return:

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

  Specified by:

  getLastPos from SubContextList

  Override hierarchy:

  getLastPos from PredicatedNodeTest

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• getNextNodetop

  protected int getNextNode()
  Get the next node in document order on the axes.

  Return:

  @return the next node in document order on the axes, or null.

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• getNextWalkertop

  public AxesWalker getNextWalker()
  Get the next walker in the location step chain.

  Return:

  @return Reference to AxesWalker derivative, or null.

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• getPrevWalkertop

  public AxesWalker getPrevWalker()
  Get the previous walker reference in the location step chain.

  Return:

  @return Reference to previous walker reference in the location step chain, or null.

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• getRoottop

  public int getRoot()
  The root node of the TreeWalker, as specified in setRoot(int root). Note that this may actually be below the current node.

  Return:

  @return The context node of the step.

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• inittop

  public void init(Compiler compiler, int opPos, int stepType) throws TransformerException
  Initialize an AxesWalker during the parse of the XPath expression.

  Parameters:

  @param compiler The Compiler object that has information about this walker in the op map.

  @param opPos The op code position of this location step.

  @param stepType The type of location step.

  Exceptions:

  @throws TransformerException

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• isDocOrderedtop

  public boolean isDocOrdered()
  Returns true if all the nodes in the iteration well be returned in document order. Warning: This can only be called after setRoot has been called!

  Return:

  @return true as a default.

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• nextNodetop

  public int nextNode()
  Moves the 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.

  Return:

  @return The new node, or null if the current node has no next node in the TreeWalker's logical view.

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• returnNextNodetop

  private int returnNextNode(int n)
  This is simply a way to bottle-neck the return of the next node, for diagnostic purposes.

  Parameters:

  @param n Node to return, or null.

  Return:

  @return The argument.

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• setDefaultDTMtop

  public void setDefaultDTM(DTM dtm)
  Set the DTM for this walker.

  Parameters:

  @param dtm Non-null reference to a DTM.

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• setExpressiontop

  public void setExpression(Expression exp)
  Set the raw expression object for this object.

  Parameters:

  @param exp the raw Expression object, which should not normally be null.

  See:

  @see com.sun.org.apache.xpath.internal.ExpressionOwner.setExpression(com.sun.org.apache.xpath.internal.Expression)

  Specified by:

  setExpression from ExpressionOwner

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• setNextWalkertop

  public void setNextWalker(AxesWalker walker)
  Set the next walker in the location step chain.

  Parameters:

  @param walker Reference to AxesWalker derivative, or may be null.

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• setPrevWalkertop

  public void setPrevWalker(AxesWalker walker)
  Set or clear the previous walker reference in the location step chain.

  Parameters:

  @param walker Reference to previous walker reference in the location step chain, or null.

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• setRoottop

  public void setRoot(int root)
  Set the root node of the TreeWalker. (Not part of the DOM2 TreeWalker interface).

  Parameters:

  @param root The context node of this step.

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• witop

  public final WalkingIterator wi()

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