Datatypes of Component Properties
Every component that is part of a display relates to a at least one property in the generated DTO class. There are rules to determine the Java type of that property.
| Component Type | Java Type | Comment |
|---|---|---|
| Button | n.a. | no property generated |
| Link | n.a. | no property generated |
| BooleanChoice | Boolean |
|
| Choice | Multiplicity = MultiValued ⇒ List<Object> Multiplicity = SingleValued ⇒ Object |
|
| DateSelector | java.util.Date |
|
| EmbeddedComponentGroup | DTO class generated for the related display | |
| EmbeddedContainer | DTO class generated for the related display or layout | |
| FileUpload | byte[] |
|
| HTML | String |
|
| Image | byte[] |
|
| Label | String |
|
| Map | String |
|
| Range | Integer |
floating point numbers are not yet supported |
| TextArea | String |
|
| TextField | String |
|
| Video | this component is not yet supported |
Explicit Modeling of Datatypes¶
You can also directly specify the datatype to be used for a modeled component. There are three ways to do it:
- setting the option DataType for a modeled component
- setting the option EntityField for a modeled component ⇒ the entity field’s type will be used for the DTO property type then
- setting the option Entity for a modeled display ⇒ when the entity has a field with a name that is identical to the name of a modeled component, the entity field’s type will be used for the DTO property type then