Execute the function.  The function must return
a valid object.
@param xctxt The current execution context.
@return A valid XObject.

@throws javax.xml.transform.TransformerException
506209
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {
    return (XString)getArg0AsString(xctxt);
  }
294427
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {

    // A bit of an ugly hack to get our context.
    ElemTemplateElement templElem =
      (ElemTemplateElement) xctxt.getNamespaceContext();
    StylesheetRoot ss = templElem.getStylesheetRoot();
    java.text.DecimalFormat formatter = null;
    java.text.DecimalFormatSymbols dfs = null;
    double num = getArg0().execute(xctxt).num();
    String patternStr = getArg1().execute(xctxt).str();

    // TODO: what should be the behavior here??
    if (patternStr.indexOf(0x00A4) > 0)
      ss.error(XSLTErrorResources.ER_CURRENCY_SIGN_ILLEGAL);  // currency sign not allowed

    // 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)
        {
          warn(xctxt, XSLTErrorResources.WG_NO_DECIMALFORMAT_DECLARATION,
               new Object[]{ dfName });  //"not found!!!

          //formatter = new java.text.DecimalFormat(patternStr);
        }
        else
        {

          //formatter = new java.text.DecimalFormat(patternStr, dfs);
          formatter = new java.text.DecimalFormat();

          formatter.setDecimalFormatSymbols(dfs);
          formatter.applyLocalizedPattern(patternStr);
        }
      }

      //else
      if (null == formatter)
      {

        // look for a possible default decimal-format
        dfs = ss.getDecimalFormatComposed(new QName(""));

        if (dfs != null)
        {
          formatter = new java.text.DecimalFormat();

          formatter.setDecimalFormatSymbols(dfs);
          formatter.applyLocalizedPattern(patternStr);
        }
        else
        {
          dfs = new java.text.DecimalFormatSymbols(java.util.Locale.US);

          dfs.setInfinity(Constants.ATTRVAL_INFINITY);
          dfs.setNaN(Constants.ATTRVAL_NAN);

          formatter = new java.text.DecimalFormat();

          formatter.setDecimalFormatSymbols(dfs);

          if (null != patternStr)
            formatter.applyLocalizedPattern(patternStr);
        }
      }

      return new XString(formatter.format(num));
    }
    catch (Exception iae)
    {
      templElem.error(XSLTErrorResources.ER_MALFORMED_FORMAT_STRING,
                      new Object[]{ patternStr });

      return XString.EMPTYSTRING;

      //throw new XSLProcessorException(iae);
    }
  }
1337069
public void execute(
          TransformerImpl transformer)
            throws TransformerException
  {
    try
    {
      // Note the content model is:
      // <!ENTITY % instructions "
      // %char-instructions;
      // | xsl:processing-instruction
      // | xsl:comment
      // | xsl:element
      // | xsl:attribute
      // ">
      String data = transformer.transformToString(this);

      transformer.getResultTreeHandler().comment(data);
    }
    catch(org.xml.sax.SAXException se)
    {
      throw new TransformerException(se);
    }
  }
197889
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {

    String name = m_arg0.execute(xctxt).str();
    int context = xctxt.getCurrentNode();
    DTM dtm = xctxt.getDTM(context);
    int doc = dtm.getDocument();
    
    String uri = dtm.getUnparsedEntityURI(name);

    return new XString(uri);
  }
919622
@Override
	public Element execute(Context context) {
		Element result = Undef.VALUE;
		for (Operation op : ops) {
			try {
				result = op.execute(context);
			} catch (EvaluationException ee) {
				throw ee.addExceptionInfo(sourceRange, context);
			}
		}
		return result;
	}
972988
public XObject execute(XPathContext xctxt)
          throws javax.xml.transform.TransformerException
  {
	 XObject m_selected;
     m_selected = ((Expression)m_obj).execute(xctxt);
     m_selected.allowDetachToRelease(m_allowRelease);
     if (m_selected.getType() == CLASS_STRING)
       return m_selected;
     else
       return new XString(m_selected.str());
  }
838404
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {

    DTMIterator nodes = m_arg0.asIterator(xctxt, xctxt.getCurrentNode());
    double sum = 0.0;
    int pos;

    while (DTM.NULL != (pos = nodes.nextNode()))
    {
      DTM dtm = nodes.getDTM(pos);
      XMLString s = dtm.getStringValue(pos);

      if (null != s)
        sum += s.toDouble();
    }
    nodes.detach();

    return new XNumber(sum);
  }
580847
public void execute(TransformerImpl transformer) throws TransformerException
  {

    transformer.pushCurrentTemplateRuleIsNull(true);    
    try
    {
      transformSelectedNodes(transformer);
    }
    finally
    {
      transformer.popCurrentTemplateRuleIsNull();
    }
  }
388154
public static XNodeSet executeFilterExpr(int context, XPathContext xctxt, 
  												PrefixResolver prefixResolver,
  												boolean isTopLevel,
  												int stackFrame,
  												Expression expr )
    throws org.apache.xml.utils.WrappedRuntimeException
  {
    PrefixResolver savedResolver = xctxt.getNamespaceContext();
    XNodeSet result = null;

    try
    {
      xctxt.pushCurrentNode(context);
      xctxt.setNamespaceContext(prefixResolver);

      // The setRoot operation can take place with a reset operation, 
      // and so we may not be in the context of LocPathIterator#nextNode, 
      // so we have to set up the variable context, execute the expression, 
      // and then restore the variable context.

      if (isTopLevel)
      {
        // System.out.println("calling m_expr.execute(getXPathContext())");
        VariableStack vars = xctxt.getVarStack();

        // These three statements need to be combined into one operation.
        int savedStart = vars.getStackFrame();
        vars.setStackFrame(stackFrame);

        result = (org.apache.xpath.objects.XNodeSet) expr.execute(xctxt);
        result.setShouldCacheNodes(true);

        // These two statements need to be combined into one operation.
        vars.setStackFrame(savedStart);
      }
      else
          result = (org.apache.xpath.objects.XNodeSet) expr.execute(xctxt);

    }
    catch (javax.xml.transform.TransformerException se)
    {

      // TODO: Fix...
      throw new org.apache.xml.utils.WrappedRuntimeException(se);
    }
    finally
    {
      xctxt.popCurrentNode();
      xctxt.setNamespaceContext(savedResolver);
    }
    return result;
  }
1290262
@Override
    public void execute(TestStep testStep, SeleniumOperationContext ctx) {
        String url = SitPathUtils.buildUrl(pm.getBaseUrl(), testStep.getLocator().getValue());
        ctx.info("url.open", url);
        seleniumDriver.get(url);
    }
929486
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {

    int context = getArg0AsNode(xctxt);
    if(DTM.NULL == context)
      return XString.EMPTYSTRING;
    DTM dtm = xctxt.getDTM(context);
    String s = (context != DTM.NULL) ? dtm.getLocalName(context) : "";
    if(s.startsWith("#") || s.equals("xmlns"))
      return XString.EMPTYSTRING;

    return new XString(s);
  }
730058
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {

    String s1 = m_arg0.execute(xctxt).str();
    String s2 = m_arg1.execute(xctxt).str();

    // Add this check for JDK consistency for empty strings.
    if (s1.length() == 0 && s2.length() == 0)
      return XBoolean.S_TRUE;

    int index = s1.indexOf(s2);

    return (index > -1) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
  }
993139
public Object extFunction(String ns, String funcName, Vector argVec,
        Object methodKey) throws javax.xml.transform.TransformerException {
        try {

            if ( funcName == null ) {
                String fmsg = XSLMessages.createXPATHMessage(
                    XPATHErrorResources.ER_ARG_CANNOT_BE_NULL,
                    new Object[] {"Function Name"} );
                throw new NullPointerException ( fmsg ); 
            }
            //Find the XPathFunction corresponding to namespace and funcName
            javax.xml.namespace.QName myQName = new QName( ns, funcName );

            // JAXP 1.3 spec says When XMLConstants.FEATURE_SECURE_PROCESSING 
            // feature is set then invocation of extension functions need to
            // throw XPathFunctionException
            if ( extensionInvocationDisabled ) {
                String fmsg = XSLMessages.createXPATHMessage(
                    XPATHErrorResources.ER_EXTENSION_FUNCTION_CANNOT_BE_INVOKED,
                    new Object[] { myQName.toString() } );
                throw new XPathFunctionException ( fmsg );
            }

            // Assuming user is passing all the needed parameters ( including
            // default values )
            int arity = argVec.size();

            javax.xml.xpath.XPathFunction xpathFunction = 
                resolver.resolveFunction ( myQName, arity );

            // not using methodKey
            ArrayList argList = new ArrayList( arity);
            for ( int i=0; i<arity; i++ ) {
                Object argument = argVec.elementAt( i );
                // XNodeSet object() returns NodeVector and not NodeList
                // Explicitly getting NodeList by using nodelist()
                if ( argument instanceof XNodeSet ) {
                    argList.add ( i, ((XNodeSet)argument).nodelist() );
                } else if ( argument instanceof XObject ) {
                    Object passedArgument = ((XObject)argument).object();
                    argList.add ( i, passedArgument );
                } else {
                    argList.add ( i, argument );
                }
            }

            return ( xpathFunction.evaluate ( argList ));
        } catch ( XPathFunctionException xfe ) {
            // If we get XPathFunctionException then we want to terminate
            // further execution by throwing WrappedRuntimeException 
            throw new org.apache.xml.utils.WrappedRuntimeException ( xfe );
        } catch ( Exception e ) {
            throw new javax.xml.transform.TransformerException ( e );
        }
    
    }
469224
public void execute(
          TransformerImpl transformer)
            throws TransformerException
  {

    if (null != m_template)
    {
      XPathContext xctxt = transformer.getXPathContext();
      VariableStack vars = xctxt.getVarStack();

      int thisframe = vars.getStackFrame();
      int nextFrame = vars.link(m_template.m_frameSize);
      
      // We have to clear the section of the stack frame that has params 
      // so that the default param evaluation will work correctly.
      if(m_template.m_inArgsSize > 0)
      {
        vars.clearLocalSlots(0, m_template.m_inArgsSize);
      
        if(null != m_paramElems)
        {
          int currentNode = xctxt.getCurrentNode();
          vars.setStackFrame(thisframe);
          int size = m_paramElems.length;
          
          for (int i = 0; i < size; i++) 
          {
            ElemWithParam ewp = m_paramElems[i];
            if(ewp.m_index >= 0)
            {
              XObject obj = ewp.getValue(transformer, currentNode);

              // Note here that the index for ElemWithParam must have been
              // statically made relative to the xsl:template being called, 
              // NOT this xsl:template.
              vars.setLocalVariable(ewp.m_index, obj, nextFrame);
            }
          }
          vars.setStackFrame(nextFrame);
        }
      }
      
      SourceLocator savedLocator = xctxt.getSAXLocator();

      try
      {
        xctxt.setSAXLocator(m_template);

        // template.executeChildTemplates(transformer, sourceNode, mode, true);
        transformer.pushElemTemplateElement(m_template);
        m_template.execute(transformer);
      }
      finally
      {
        transformer.popElemTemplateElement();
        xctxt.setSAXLocator(savedLocator);
        // When we entered this function, the current 
        // frame buffer (cfb) index in the variable stack may 
        // have been manually set.  If we just call 
        // unlink(), however, it will restore the cfb to the 
        // previous link index from the link stack, rather than 
        // the manually set cfb.  So, 
        // the only safe solution is to restore it back 
        // to the same position it was on entry, since we're 
        // really not working in a stack context here. (Bug4218)
        vars.unlink(thisframe);
      }
    }
    else
    {
      transformer.getMsgMgr().error(this, XSLTErrorResources.ER_TEMPLATE_NOT_FOUND,
                                    new Object[]{ m_templateName });  //"Could not find template named: '"+templateName+"'");
    }
    
  }
1032918
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {
    return new XNumber(java.lang.Math.floor(m_arg0.execute(xctxt).num()));
  }
811333
public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException
  {

    String prefix;
    String namespace;
    String methName;

    String fullName = m_arg0.execute(xctxt).str();
    int indexOfNSSep = fullName.indexOf(':');

    if (indexOfNSSep < 0)
    {
      prefix = "";
      namespace = Constants.S_XSLNAMESPACEURL;
      methName = fullName;
    }
    else
    {
      prefix = fullName.substring(0, indexOfNSSep);
      namespace = xctxt.getNamespaceContext().getNamespaceForPrefix(prefix);
      if (null == namespace)
        return XBoolean.S_FALSE;
      methName= fullName.substring(indexOfNSSep + 1);
    }

    if (namespace.equals(Constants.S_XSLNAMESPACEURL)
    ||  namespace.equals(Constants.S_BUILTIN_EXTENSIONS_URL))
    {
      try
      {
        TransformerImpl transformer = (TransformerImpl) xctxt.getOwnerObject();
        return transformer.getStylesheet().getAvailableElements().containsKey(
                                                            new QName(namespace, methName))
               ? XBoolean.S_TRUE : XBoolean.S_FALSE;
      }
      catch (Exception e)
      {
        return XBoolean.S_FALSE;
      }
    }
    else
    {
      //dml
      ExtensionsProvider extProvider = (ExtensionsProvider)xctxt.getOwnerObject();
      return extProvider.elementAvailable(namespace, methName)
             ? XBoolean.S_TRUE : XBoolean.S_FALSE;
    }
  }
132341
@Override
  public Object execute(@Nonnull final CommandContext context) throws Exception {
    TTop ttop = new TTop(context.getIo().terminal);
    ttop.run();

    return null;
  }