/**
   * 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
   */
  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)) {
      try {
        return Keywords.functionAvailable(methName) ? XBoolean.S_TRUE : XBoolean.S_FALSE;
      } catch (Exception e) {
        return XBoolean.S_FALSE;
      }
    } else {
      // dml
      ExtensionsProvider extProvider = (ExtensionsProvider) xctxt.getOwnerObject();
      return extProvider.functionAvailable(namespace, methName)
          ? XBoolean.S_TRUE
          : XBoolean.S_FALSE;
    }
  }
Example #2
0
  /**
   * 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
   */
  public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException {

    // TransformerImpl transformer = (TransformerImpl)xctxt;
    TransformerImpl transformer = (TransformerImpl) xctxt.getOwnerObject();
    XNodeSet nodes = null;
    int context = xctxt.getCurrentNode();
    DTM dtm = xctxt.getDTM(context);
    int docContext = dtm.getDocumentRoot(context);

    if (DTM.NULL == docContext) {

      // path.error(context, XPATHErrorResources.ER_CONTEXT_HAS_NO_OWNERDOC); //"context does not
      // have an owner document!");
    }

    String xkeyname = getArg0().execute(xctxt).str();
    QName keyname = new QName(xkeyname, xctxt.getNamespaceContext());
    XObject arg = getArg1().execute(xctxt);
    boolean argIsNodeSetDTM = (XObject.CLASS_NODESET == arg.getType());
    KeyManager kmgr = transformer.getKeyManager();

    // Don't bother with nodeset logic if the thing is only one node.
    if (argIsNodeSetDTM) {
      XNodeSet ns = (XNodeSet) arg;
      ns.setShouldCacheNodes(true);
      int len = ns.getLength();
      if (len <= 1) argIsNodeSetDTM = false;
    }

    if (argIsNodeSetDTM) {
      Hashtable usedrefs = null;
      DTMIterator ni = arg.iter();
      int pos;
      UnionPathIterator upi = new UnionPathIterator();
      upi.exprSetParent(this);

      while (DTM.NULL != (pos = ni.nextNode())) {
        dtm = xctxt.getDTM(pos);
        XMLString ref = dtm.getStringValue(pos);

        if (null == ref) continue;

        if (null == usedrefs) usedrefs = new Hashtable();

        if (usedrefs.get(ref) != null) {
          continue; // We already have 'em.
        } else {

          // ISTRUE being used as a dummy value.
          usedrefs.put(ref, ISTRUE);
        }

        XNodeSet nl =
            kmgr.getNodeSetDTMByKey(xctxt, docContext, keyname, ref, xctxt.getNamespaceContext());

        nl.setRoot(xctxt.getCurrentNode(), xctxt);

        //        try
        //        {
        upi.addIterator(nl);
        //        }
        //        catch(CloneNotSupportedException cnse)
        //        {
        //          // will never happen.
        //        }
        // mnodeset.addNodesInDocOrder(nl, xctxt); needed??
      }

      int current = xctxt.getCurrentNode();
      upi.setRoot(current, xctxt);

      nodes = new XNodeSet(upi);
    } else {
      XMLString ref = arg.xstr();
      nodes = kmgr.getNodeSetDTMByKey(xctxt, docContext, keyname, ref, xctxt.getNamespaceContext());
      nodes.setRoot(xctxt.getCurrentNode(), xctxt);
    }

    return nodes;
  }