Examples of org.apache.xml.dtm.DTMAxisTraverser

org.apache.xml.dtm.DTMAxisTraverser
A class that implements traverses DTMAxisTraverser interface can traverse a set of nodes, usually as defined by an XPath axis. It is different from an iterator, because it does not need to hold state, and, in fact, must not hold any iteration-based state. It is meant to be implemented as an inner class of a DTM, and returned by the getAxisTraverser(final int axis) function.
A DTMAxisTraverser can probably not traverse a reverse axis in document order.

Typical usage:
```
 for(int nodeHandle=myTraverser.first(myContext); nodeHandle!=DTM.NULL; nodeHandle=myTraverser.next(myContext,nodeHandle)) { ... processing for node indicated by nodeHandle goes here ... } 
```
@author Scott Boag

      return super.asNode(xctxt);


    int current = xctxt.getCurrentNode();
    
    DTM dtm = xctxt.getDTM(current);
    DTMAxisTraverser traverser = dtm.getAxisTraverser(m_axis);
    
    String localName = getLocalName();
    String namespace = getNamespace();
    int what = m_whatToShow;
    
    // System.out.print(" (DescendantIterator) ");
    
    // System.out.println("what: ");
    // NodeTest.debugWhatToShow(what);
    if(DTMFilter.SHOW_ALL == what
       || localName == NodeTest.WILD
       || namespace == NodeTest.WILD)
    {
      return traverser.first(current);
    }
    else
    {
      int type = getNodeTypeTest(what);
      int extendedType = dtm.getExpandedTypeID(namespace, localName, type);
      return traverser.first(current, extendedType);
    }
  }

View Full Code Here

   * @return A DTMAxisTraverser, or null if the given axis isn't supported.
   */
  public DTMAxisTraverser getAxisTraverser(final int axis)
  {


    DTMAxisTraverser traverser;


    if (null == m_traversers)  // Cache of stateless traversers for this DTM
    {
      m_traversers = new DTMAxisTraverser[Axis.names.length];
      traverser = null;

View Full Code Here

      return super.asNode(xctxt);


    int current = xctxt.getCurrentNode();
    
    DTM dtm = xctxt.getDTM(current);
    DTMAxisTraverser traverser = dtm.getAxisTraverser(m_axis);
    
    String localName = getLocalName();
    String namespace = getNamespace();
    int what = m_whatToShow;
    
    // System.out.print(" (DescendantIterator) ");
    
    // System.out.println("what: ");
    // NodeTest.debugWhatToShow(what);
    if(DTMFilter.SHOW_ALL == what
       || localName == NodeTest.WILD
       || namespace == NodeTest.WILD)
    {
      return traverser.first(current);
    }
    else
    {
      int type = getNodeTypeTest(what);
      int extendedType = dtm.getExpandedTypeID(namespace, localName, type);
      return traverser.first(current, extendedType);
    }
  }

View Full Code Here

    DTM dtm = xctxt.getDTM(context);


    if (null != dtm)
    {
      int predContext = xctxt.getCurrentNode();
      DTMAxisTraverser traverser;
      
      int axis = m_axis;
      
      boolean needToTraverseAttrs = WalkerFactory.isDownwardAxisOfMany(axis);
      boolean iterRootIsAttr = (dtm.getNodeType(xctxt.getIteratorRoot()) 
                                 == DTM.ATTRIBUTE_NODE);


      if((Axis.PRECEDING == axis) && iterRootIsAttr)
      {
        axis = Axis.PRECEDINGANDANCESTOR;
      }
      
      traverser = dtm.getAxisTraverser(axis);


      for (int relative = traverser.first(context); DTM.NULL != relative;
              relative = traverser.next(context, relative))
      {
        try
        {
          xctxt.pushCurrentNode(relative);


          score = execute(xctxt);


          if (score != NodeTest.SCORE_NONE)
          {
        //score = executePredicates( xctxt, prevStep, SCORE_OTHER, 
        //       predContext, relative);
        if (executePredicates(xctxt, dtm, context))
      return score;
        
        score = NodeTest.SCORE_NONE;
          }
          
          if(needToTraverseAttrs && iterRootIsAttr
             && (DTM.ELEMENT_NODE == dtm.getNodeType(relative)))
          {
            int xaxis = Axis.ATTRIBUTE;
            for (int i = 0; i < 2; i++) 
            {            
              DTMAxisTraverser atraverser = dtm.getAxisTraverser(xaxis);
        
              for (int arelative = atraverser.first(relative); 
                      DTM.NULL != arelative;
                      arelative = atraverser.next(relative, arelative))
              {
                try
                {
                  xctxt.pushCurrentNode(arelative);

View Full Code Here

          int predPos, DTM dtm, int context, int pos)
  {


    try
    {
      DTMAxisTraverser traverser =
        dtm.getAxisTraverser(Axis.PRECEDINGSIBLING);


      for (int child = traverser.first(context); DTM.NULL != child;
              child = traverser.next(context, child))
      {
        try
        {
          xctxt.pushCurrentNode(child);

View Full Code Here

    DTM dtm = xctxt.getDTM(context);
    int parent = dtm.getParent(context);


    try
    {
      DTMAxisTraverser traverser = dtm.getAxisTraverser(Axis.CHILD);


      for (int child = traverser.first(parent); DTM.NULL != child;
              child = traverser.next(parent, child))
      {
        try
        {
          xctxt.pushCurrentNode(child);

View Full Code Here

            throws javax.xml.transform.TransformerException
  {


    XObject score = NodeTest.SCORE_NONE;
    int context = currentNode;
    DTMAxisTraverser traverser;


    traverser = dtm.getAxisTraverser(m_axis);


    for (int relative = traverser.first(context); DTM.NULL != relative;
            relative = traverser.next(context, relative))
    {
      try
      {
        xctxt.pushCurrentNode(relative);

View Full Code Here

      return super.asNode(xctxt);


    int current = xctxt.getCurrentNode();
    
    DTM dtm = xctxt.getDTM(current);
    DTMAxisTraverser traverser = dtm.getAxisTraverser(m_axis);
    
    String localName = getLocalName();
    String namespace = getNamespace();
    int what = m_whatToShow;
    
    // System.out.print(" (DescendantIterator) ");
    
    // System.out.println("what: ");
    // NodeTest.debugWhatToShow(what);
    if(DTMFilter.SHOW_ALL == what
       || localName == NodeTest.WILD
       || namespace == NodeTest.WILD)
    {
      return traverser.first(current);
    }
    else
    {
      int type = getNodeTypeTest(what);
      int extendedType = dtm.getExpandedTypeID(namespace, localName, type);
      return traverser.first(current, extendedType);
    }
  }

View Full Code Here

          int predPos, DTM dtm, int context, int pos)
  {


    try
    {
      DTMAxisTraverser traverser =
        dtm.getAxisTraverser(Axis.PRECEDINGSIBLING);


      for (int child = traverser.first(context); DTM.NULL != child;
              child = traverser.next(context, child))
      {
        try
        {
          xctxt.pushCurrentNode(child);

View Full Code Here

    DTM dtm = xctxt.getDTM(context);
    int parent = dtm.getParent(context);


    try
    {
      DTMAxisTraverser traverser = dtm.getAxisTraverser(Axis.CHILD);


      for (int child = traverser.first(parent); DTM.NULL != child;
              child = traverser.next(parent, child))
      {
        try
        {
          xctxt.pushCurrentNode(child);

View Full Code Here

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Related Classes of org.apache.xml.dtm.DTMAxisTraverser

org.apache.xml.dtm.ref.DTMDefaultBaseTraversers

org.apache.xpath.axes.DescendantIterator

org.apache.xpath.patterns.ContextMatchStepPattern

org.apache.xpath.patterns.StepPattern

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