lombok
Annotation Type Builder.Extension

@Target(value=METHOD)
@Retention(value=SOURCE)
public static @interface Builder.Extension

Use this on methods in a @Builder-annotated class to specify extensions for the generated builder. To decide if an extension initializes required fields or not, @Builder.Extension will look at the method name an read the fields like this:

 withFullnameAndAge(final String fullname, final int age)
 
 ([<PREFIX>]<FIELD_NAME1>And<FIELD_NAME2>And..<FIELD_NAMEN>())
 

To allow different method names, for example if you want to prevent ambiguous method signatures, you need to specify the affected fields like this:

 @Builder(fields={"fullname", "age"});
 private void customMethodName(final String fullname, final int age)
 

Note: For this to work, the methods annotated by @Builder.Extension, need to be private and must return void. And if you want to initialize a required field value in you own extension, you need to set all other required initializes values too.

fields

public abstract String[] fields

List of fields that are affected by this extension.

This list is used to determine whether a extension initializes all required fields or not.

If no list is provided the method name is analyzed.

Default:

{}