| [[HowtodefineastaticCamelconvertermethodinScala-HowtodefineastaticCamelconvertermethodinScala]] |
| = How to define a static Camel converter method in Scala? |
| |
| When you use Scala object you can define the static method for others to |
| use. Scala will create a class which implements the singleton pattern |
| for that class object. |
| |
| If the object name is `A`, you can find the singleton class name with `A$`. |
| Using `javap` to recompile the class `A` and `A$`, you will find `A` has bunch |
| of static method, and `A$` doesn't have any of them. If you specify the |
| converter class package name in |
| `META-INF/service/org/apache/camel/TypeConverter`, Camel will load the |
| class `A` and `A$` at the same time. As the `A$` construction method is not |
| supposed to be invoked, Camel will complain that he cannot load the |
| converter method which you are supposed to use because he can't create |
| an instance of `A$`. |
| |
| To avoid this kind of error, we need to specify the full class name of `A` |
| in the `TypeConverter` to let Camel load the converter directly. |
