/// <summary>
/// 把子节点添加到网关路由节点，根据网关节点和子节点是否为空处理
/// </summary>
/// <param name="fromTransition">起始转移</param>
/// <param name="currentGatewayActivity">当前网关节点</param>
/// <param name="gatewayComponent">网关Component</param>
/// <param name="child">子节点</param>
/// <returns>下一步Component</returns>
protected NextActivityComponent AddChildToGatewayComponent(TransitionEntity fromTransition,
ActivityEntity currentGatewayActivity,
NextActivityComponent gatewayComponent,
NextActivityComponent child)
{
if ((gatewayComponent == null) && (child != null))
{
gatewayComponent = NextActivityComponentFactory.CreateNextActivityComponent(fromTransition, currentGatewayActivity);
}
if ((gatewayComponent != null) && (child != null))
{
gatewayComponent.Add(child);
}
return(gatewayComponent);
}