public class SuperBuilderAbstractToBuilder { public static class Parent { int parentField; @java.lang.SuppressWarnings("all") public static abstract class ParentBuilder> { @java.lang.SuppressWarnings("all") private int parentField; @java.lang.SuppressWarnings("all") protected B $fillValuesFrom(final C instance) { ParentBuilder.$fillValuesFromInstanceIntoBuilder(instance, this); return self(); } @java.lang.SuppressWarnings("all") private static void $fillValuesFromInstanceIntoBuilder(final Parent instance, final ParentBuilder b) { b.parentField(instance.parentField); } @java.lang.SuppressWarnings("all") protected abstract B self(); @java.lang.SuppressWarnings("all") public abstract C build(); @java.lang.SuppressWarnings("all") public B parentField(final int parentField) { this.parentField = parentField; return self(); } @java.lang.Override @java.lang.SuppressWarnings("all") public java.lang.String toString() { return "SuperBuilderAbstractToBuilder.Parent.ParentBuilder(parentField=" + this.parentField + ")"; } } @java.lang.SuppressWarnings("all") private static final class ParentBuilderImpl extends ParentBuilder { @java.lang.SuppressWarnings("all") private ParentBuilderImpl() { } @java.lang.Override @java.lang.SuppressWarnings("all") protected ParentBuilderImpl self() { return this; } @java.lang.Override @java.lang.SuppressWarnings("all") public Parent build() { return new Parent(this); } } @java.lang.SuppressWarnings("all") protected Parent(final ParentBuilder b) { this.parentField = b.parentField; } @java.lang.SuppressWarnings("all") public static ParentBuilder builder() { return new ParentBuilderImpl(); } @java.lang.SuppressWarnings("all") public ParentBuilder toBuilder() { return new ParentBuilderImpl().$fillValuesFrom(this); } } public static abstract class Child extends Parent { double childField; @java.lang.SuppressWarnings("all") public static abstract class ChildBuilder> extends Parent.ParentBuilder { @java.lang.SuppressWarnings("all") private double childField; @java.lang.Override @java.lang.SuppressWarnings("all") protected B $fillValuesFrom(final C instance) { super.$fillValuesFrom(instance); ChildBuilder.$fillValuesFromInstanceIntoBuilder(instance, this); return self(); } @java.lang.SuppressWarnings("all") private static void $fillValuesFromInstanceIntoBuilder(final Child instance, final ChildBuilder b) { b.childField(instance.childField); } @java.lang.Override @java.lang.SuppressWarnings("all") protected abstract B self(); @java.lang.Override @java.lang.SuppressWarnings("all") public abstract C build(); @java.lang.SuppressWarnings("all") public B childField(final double childField) { this.childField = childField; return self(); } @java.lang.Override @java.lang.SuppressWarnings("all") public java.lang.String toString() { return "SuperBuilderAbstractToBuilder.Child.ChildBuilder(super=" + super.toString() + ", childField=" + this.childField + ")"; } } @java.lang.SuppressWarnings("all") protected Child(final ChildBuilder b) { super(b); this.childField = b.childField; } } public static class GrandChild extends Child { String grandChildField; @java.lang.SuppressWarnings("all") public static abstract class GrandChildBuilder> extends Child.ChildBuilder { @java.lang.SuppressWarnings("all") private String grandChildField; @java.lang.Override @java.lang.SuppressWarnings("all") protected B $fillValuesFrom(final C instance) { super.$fillValuesFrom(instance); GrandChildBuilder.$fillValuesFromInstanceIntoBuilder(instance, this); return self(); } @java.lang.SuppressWarnings("all") private static void $fillValuesFromInstanceIntoBuilder(final GrandChild instance, final GrandChildBuilder b) { b.grandChildField(instance.grandChildField); } @java.lang.Override @java.lang.SuppressWarnings("all") protected abstract B self(); @java.lang.Override @java.lang.SuppressWarnings("all") public abstract C build(); @java.lang.SuppressWarnings("all") public B grandChildField(final String grandChildField) { this.grandChildField = grandChildField; return self(); } @java.lang.Override @java.lang.SuppressWarnings("all") public java.lang.String toString() { return "SuperBuilderAbstractToBuilder.GrandChild.GrandChildBuilder(super=" + super.toString() + ", grandChildField=" + this.grandChildField + ")"; } } @java.lang.SuppressWarnings("all") private static final class GrandChildBuilderImpl extends GrandChildBuilder { @java.lang.SuppressWarnings("all") private GrandChildBuilderImpl() { } @java.lang.Override @java.lang.SuppressWarnings("all") protected GrandChildBuilderImpl self() { return this; } @java.lang.Override @java.lang.SuppressWarnings("all") public GrandChild build() { return new GrandChild(this); } } @java.lang.SuppressWarnings("all") protected GrandChild(final GrandChildBuilder b) { super(b); this.grandChildField = b.grandChildField; } @java.lang.SuppressWarnings("all") public static GrandChildBuilder builder() { return new GrandChildBuilderImpl(); } @java.lang.SuppressWarnings("all") public GrandChildBuilder toBuilder() { return new GrandChildBuilderImpl().$fillValuesFrom(this); } } public static void test() { GrandChild x = GrandChild.builder().grandChildField("").parentField(5).childField(2.5).build().toBuilder().build(); } }