Examples of org.apache.xpath.Expression

org.apache.xpath.Expression
This abstract class serves as the base for all expression objects. An Expression can be executed to return a {@link org.apache.xpath.objects.XObject}, normally has a location within a document or DOM, can send error and warning events, and normally do not hold state and are meant to be immutable once construction has completed. An exception to the immutibility rule is iterators and walkers, which must be cloned in order to be used -- the original must still be immutable.

    Vector argVec = new Vector();
    int nArgs = m_argVec.size();


    for (int i = 0; i < nArgs; i++)
    {
      Expression arg = (Expression) m_argVec.elementAt(i);
      
      XObject xobj = arg.execute(xctxt);
      /*
       * Should cache the arguments for func:function
       */
      xobj.allowDetachToRelease(false); 
      argVec.addElement(xobj);

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   */
  public void callArgVisitors(XPathVisitor visitor)
  {
      for (int i = 0; i < m_argVec.size(); i++)
      {
         Expression exp = (Expression)m_argVec.elementAt(i);
         exp.callVisitors(new ArgExtOwner(exp), visitor);
      }
    
  }

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    int nArgs = m_argVec.size();


    for (int i = 0; i < nArgs; i++)
    {
      Expression arg = (Expression) m_argVec.elementAt(i);


      arg.exprSetParent(n);
    }    
  }

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          rth.processingInstruction(
            javax.xml.transform.Result.PI_DISABLE_OUTPUT_ESCAPING, "");


        try
        {
          Expression expr = m_selectExpression.getExpression();


          if (transformer.getDebug())
          {
            XObject obj = expr.execute(xctxt);


            transformer.getTraceManager().fireSelectedEvent(current, this,
                    "select", m_selectExpression, obj);
            obj.dispatchCharactersEvents(rth);
          }
          else
          {
            expr.executeCharsToContentHandler(xctxt, rth);
          }
        }
        finally
        {
          if (m_disableOutputEscaping)

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  MultistepExprHolder head = null;
  MultistepExprHolder tail = null;
  int numPathsFound = 0;
  int n = paths.size();
  
  Expression expr1 = firstOccuranceOwner.getExpression();
  if(DEBUG)
    assertIsLocPathIterator(expr1, firstOccuranceOwner);
  boolean isGlobal = (paths == m_absPaths);
  LocPathIterator lpi = (LocPathIterator)expr1;
  int stepCount = countSteps(lpi);
  for(int j = start; j < n; j++)
  {
    ExpressionOwner owner2 = (ExpressionOwner)paths.elementAt(j);
    if(null != owner2)
    {
      Expression expr2 = owner2.getExpression();
      boolean isEqual = expr2.deepEquals(lpi);
      if(isEqual)
      {      
        LocPathIterator lpi2  = (LocPathIterator)expr2;        
        if(null == head)
        {

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    // this third argument is not a locale name. It is the name of a
    // decimal-format declared in the stylesheet!(xsl:decimal-format
    try
    {
      Expression arg2Expr = getArg2();


      if (null != arg2Expr)
      {
        String dfName = arg2Expr.execute(xctxt).str();
        QName qname = new QName(dfName, xctxt.getNamespaceContext());


        dfs = ss.getDecimalFormatComposed(qname);


        if (null == dfs)

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          rth.processingInstruction(
            javax.xml.transform.Result.PI_DISABLE_OUTPUT_ESCAPING, "");


        try
        {
          Expression expr = m_selectExpression.getExpression();


          if (TransformerImpl.S_DEBUG)
          {
            XObject obj = expr.execute(xctxt);


            transformer.getTraceManager().fireSelectedEvent(current, this,
                    "select", m_selectExpression, obj);
            obj.dispatchCharactersEvents(rth);
          }
          else
          {
            expr.executeCharsToContentHandler(xctxt, rth);
          }
        }
        finally
        {
          if (m_disableOutputEscaping)

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    int docContext = dtm.getDocumentRoot(context);
    XObject arg = (XObject) this.getArg0().execute(xctxt);


    String base = "";
    Expression arg1Expr = this.getArg1();


    if (null != arg1Expr)
    {


      // The URI reference may be relative. The base URI (see [3.2 Base URI]) 
      // of the node in the second argument node-set that is first in document 
      // order is used as the base URI for resolving the 
      // relative URI into an absolute URI. 
      XObject arg2 = arg1Expr.execute(xctxt);


      if (XObject.CLASS_NODESET == arg2.getType())
      {
        int baseNode = arg2.iter().nextNode();

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    if(null != vvar)
    {
      XPath xpath = vvar.getSelect();
      if(null != xpath)
      {
        Expression expr = xpath.getExpression();
        if(null != expr && expr instanceof PathComponent)
        {
          return ((PathComponent)expr).getAnalysisBits();
        }
      }

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    DTMManager dtmMgr = xctxt.getDTMManager();
    int context = xctxt.getContextNode();
    if(dtmMgr.getDTM(xns.getRoot()).getDocument() != 
       dtmMgr.getDTM(context).getDocument())
    {
      Expression expr = (Expression)xns.getContainedIter();
      xns = (XNodeSet)expr.asIterator(xctxt, context);
    }
    return xns;
  }

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