Parameter

```
@Retention(RUNTIME)
@Target({ANNOTATION_TYPE,FIELD})
@Documented
@API(status=MAINTAINED,
     since="5.13.3")
public @interface Parameter
```
@Parameter is used to signal that a field in a @ParameterizedClass constitutes a parameter and marks it for field injection.
@Parameter may also be used as a meta-annotation in order to create a custom composed annotation that inherits the semantics of @Parameter.

Since:

5.13

See Also:

ParameterizedClass, ArgumentsAccessor, AggregateWith, ArgumentConverter, ConvertWith

- Field Summary
  
  Fields
  Modifier and Type Fields Description
  
  static int UNSET_INDEX
  Constant that indicates that the index of the parameter is unset.
- Optional Element Summary
  
  Optional Elements
  Modifier and Type Optional Element Description
  
  int value
  {@return the index of the parameter in the list of parameters}

- Field Detail
  - UNSET_INDEX
```
static final int UNSET_INDEX
```
    Constant that indicates that the index of the parameter is unset.
- Element Detail
  - value
```
int value
```
    {@return the index of the parameter in the list of parameters}
    Must be -1 (the default) for aggregators, that is any field of type ArgumentsAccessor or any field annotated with @AggregateWith.
    May be omitted if there's a single indexed parameter. Otherwise, must be unique among all indexed parameters of the parameterized class and its superclasses.
    
    Default:
    
    -1