Annotation Interface Group

@Target(METHOD)
@Retention(RUNTIME)
public @interface Group

Identifies the key for a group.

@Group should be used when you have control over the key class. For example:

 class User {

    ...
    String office;
    ...

    int hashCode() {
       // Defines the hash for the key, normally used to determine location
       ...
    }

    // Override the location by specifying a group, all keys in the same
    // group end up with the same owner
    @Group
    String getOffice() {
       return office;
    }
 }
 

If you don't have control over the key class, you can specify a Grouper (in your configuration) which can be used to specify the group externally.

You must set the groupsEnabled property to true in your configuration in order to use groups.

Author:

Pete Muir

See Also:

• Grouper