paramNode1.setPosition(new Point(50, 50));
String paramValue1 = "300";
paramNode1.setDefaultValue(paramValue1);
// Output parameter
OutputNode outParamNode = (OutputNode) workflow.addNode(this.outputComponent);
outParamNode.setPosition(new Point(300, 220));
// Connect ports
graph.addEdge(paramNode1.getOutputPort(0), gfacNode.getInputPort(0));
graph.addEdge(gfacNode.getOutputPort(0), outParamNode.getInputPort(0));