DataSourceContentType (iKnowBase API Documentation)

```
@Target({METHOD,FIELD,ANNOTATION_TYPE})
@Retention(RUNTIME)
@Constraint(validatedBy={})
@Documented
public @interface DataSourceContentType
```
The content type of the annotated DataSource must match the specified regular expression and its content type in combination with its file name must exist in the iKnowBase configuration. The regular expression follows the Java regular expression conventions, see Pattern.
Accepts DataSource. null elements are considered valid.

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  String regex
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  Class<?>[] groups
  
  String message
  
  Class<? extends javax.validation.Payload>[] payload

- Element Detail
  - regex
```
String regex
```
- - message
```
String message
```
    Default:
    
    "com.iknowbase.presentationservices.validation.DataSourceContentType.message"
- - groups
```
Class<?>[] groups
```
    Default:
    
    {}
- - payload
```
Class<? extends javax.validation.Payload>[] payload
```
    Default:
    
    {}