gistfile1.java

@Retention(RetentionPolicy.RUNTIME)
@Target([ElementType.FIELD, ElementType.CONSTRUCTOR, ElementType.METHOD, ElementType.ANNOTATION_TYPE, ElementType.PARAMETER])
@BindingAnnotation
@AutoBind
@interface MySQL {

    String databaseName()

}

@Immutable
class MySQLImpl implements MySQL {

    final String databaseName

    String databaseName() {
        databaseName
    }

    // This is specified in java.lang.Annotation.
    int hashCode() {
        (127 * "databaseName".hashCode()) ^ databaseName.hashCode()
    }


    class<? extends Annotation> annotationType() {
        MySQL
    }

}

class MySQLAutoBindProvider implements AutoBindProvider<MySQL> {

    public void configure(Binder binder, MySQL annotation) {
        def sql = Sql.newInstance("jdbc:mysql://localhost:3306/${annotation.databaseName()}?user=admin&password=d0cker")
        binder.bind(Sql).annotatedWith(new MySQLImpl(annotation.databaseName())).toInstance(sql)
    }

}