Lombok构建器包范围

Question

I would like to generate package-scope builder using Lombok , but I'm not sure if it's possible (I didn't find any clues in documentation ).

By default Lombok generates public builder, ie this code:

@Builder
class User {

    private final String name;
}

Is translated into this:

class User {
    private final String name;

    User(final String name) {
        this.name = name;
    }

    public static User.UserBuilder builder() { // <-- how to make it package-private?
        return new User.UserBuilder();
    }

    public static class UserBuilder { // <-- how to make it package-private?
        private String name;

        UserBuilder() {
        }

        public User.UserBuilder name(final String name) {
            this.name = name;
            return this;
        }

        public User build() {
            return new User(this.name);
        }

        public String toString() {
            return "User.UserBuilder(name=" + this.name + ")";
        }
    }
}

Is there any way to generate builder class without this leading public keyword?

Answer 1

Check out the below in the @Builder documentation :

@Builder(access = AccessLevel.PACKAGE) is legal (and will generate the builder class, the builder method, etc with the indicated access level) starting with lombok v1.18.8

And if you see the source code of Builder here , you'll see that by default, the access level of a @Builder would be lombok.AccessLevel.PUBLIC , but can be made package-private with @Builder(access = AccessLevel.PACKAGE) .

Also FYI, the following access levels are supported by @Builder : PUBLIC, MODULE, PROTECTED, PACKAGE, PRIVATE . This is via the AccessLevel enum's source code here .