如何使用构建器复制/转换AutoValue对象

// AutoValue对象
@AutoValue
abstract class Person {
    abstract String getName();
    abstract int getAge();

    static Builder builder() {
        return new AutoValue_Person.Builder();
    }

    @AutoValue.Builder
    abstract static class Builder {
        abstract Builder setName(String name);
        abstract Builder setAge(int age);
        abstract Person build();
    }
}

// 构建器类
class PersonBuilder {
    private String name;
    private int age;

    PersonBuilder setName(String name) {
        this.name = name;
        return this;
    }

    PersonBuilder setAge(int age) {
        this.age = age;
        return this;
    }

    Person build() {
        return Person.builder()
                .setName(name)
                .setAge(age)
                .build();
    }
}

// 使用构建器复制/转换AutoValue对象
public class Main {
    public static void main(String[] args) {
        Person person1 = Person.builder()
                .setName("John")
                .setAge(25)
                .build();

        PersonBuilder builder = new PersonBuilder();
        Person person2 = builder.setName(person1.getName())
                .setAge(person1.getAge())
                .build();

        System.out.println(person1);
        System.out.println(person2);
    }
}