private boolean hasComplexTypes() {
    List<DataPort> inputPorts = node.getInputPorts();
    for (DataPort inPort : inputPorts) {
      Port fromPort = inPort.getFromPort();
      Node fromNode = inPort.getFromNode();
      if (fromNode instanceof WSNode) {
        if (null != fromPort && fromPort instanceof DataPort) {

        } else {
          return false;
        }
      } else {
        return false;
      }
    }
    return false;
  }
  private void initSchema(File rootDir, File srcDir, File classesDir) {

    List<DataPort> inputPorts = node.getInputPorts();
    for (DataPort inPort : inputPorts) {
      Port fromPort = inPort.getFromPort();
      Node fromNode = inPort.getFromNode();
      if (fromNode instanceof WSNode) {
        WSNode fromWsNode = (WSNode) fromNode;
        if (null != fromPort && fromPort instanceof DataPort) {
          DataPort fromDataPort = (DataPort) fromPort;
          WsdlDefinitions wsdl =
              engine.getGUI().getWorkflow().getWSDLs().get(fromWsNode.getWSDLID());
          Iterator<XmlNamespace> itr = wsdl.xml().namespaces().iterator();
          try {
            XmlElement schema = wsdl.getTypes().element("schema").clone();
            // do not change the following ordering of setting
            // namespaces.
            schema.setNamespace(
                xsul5.XmlConstants.BUILDER.newNamespace("http://www.w3.org/2001/XMLSchema"));
            while (itr.hasNext()) {
              XmlNamespace next = itr.next();
              if (!"".equals(next.getPrefix()) && null != next.getPrefix()) {
                schema.setAttributeValue("xmlns:" + next.getPrefix(), next.getName());
              }
            }

            try {
              xsul5.XmlConstants.BUILDER.serializeToOutputStream(
                  schema,
                  new FileOutputStream(
                      rootDir.getCanonicalPath() + File.separatorChar + "types.xsd"));
            } catch (Exception e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
            }

            typesPath = rootDir.getCanonicalPath() + File.separatorChar + "mytype.jar";
            String[] args =
                new String[] {
                  "-d",
                  classesDir.getCanonicalPath(),
                  "-src",
                  srcDir.getCanonicalPath(),
                  "-out",
                  typesPath,
                  rootDir.getCanonicalPath() + File.separatorChar + "types.xsd"
                };
            SchemaCompilerUtil.compile(args);

          } catch (XmlBuilderException e) {
            this.engine.getGUI().getErrorWindow().error(e);
          } catch (CloneNotSupportedException e) {
            this.engine.getGUI().getErrorWindow().error(e);
          } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }

        } else {
          throw new WorkflowRuntimeException("Unknown port for code generation" + fromPort);
        }
      } else {
        throw new WorkflowRuntimeException("Unknown from node for code generation" + fromNode);
      }
    }
  }