```
@Retention(RUNTIME)
@Target(TYPE)
public @interface DataObject
```
Declares a data object, such object must provide at least:
- a constructor with io.vertx.core.json.JsonObject
When the data object is processed, a model of properties from the setter methods or adder methods. Single valued and multi valued properties are supported.
A setter is just like a JavaBean setter, however the method return type shall be fluent and return the current object. A List setter type declares a multi valued property, otherwise it declares a single valued property.
An adder is a method prefixed by add, its purpose is to declare a List of properties. An adder declares a multi valued property, mapped to the io.vertx.core.json.JsonArray type. An adder and a multi valued setter of the same property name are naturally compatible and is encouraged.
Properties types can be:
- any basic type
- a valid data object type
- io.vertx.core.json.JsonObject
- io.vertx.core.json.JsonArray
- an enum type
- a List of above
A data object can be an interface or an abstract class to accomodate the api design. Data object can extend other data objects.
Sometimes data object can have a toJson() method that takes no arguments and returns a JsonObject representing the data object as a JsonObject.
Author:

Tim Fox

Annotation Type DataObject