import java.util.List; public class SuperBuilderWithNonNull { public static class Parent { @lombok.NonNull final String nonNullParentField; @java.lang.SuppressWarnings("all") private static String $default$nonNullParentField() { return "default"; } @java.lang.SuppressWarnings("all") public static abstract class ParentBuilder<C extends Parent, B extends ParentBuilder<C, B>> { @java.lang.SuppressWarnings("all") private boolean nonNullParentField$set; @java.lang.SuppressWarnings("all") private String nonNullParentField$value; @java.lang.SuppressWarnings("all") protected abstract B self(); @java.lang.SuppressWarnings("all") public abstract C build(); @java.lang.SuppressWarnings("all") public B nonNullParentField(@lombok.NonNull final String nonNullParentField) { if (nonNullParentField == null) { throw new java.lang.NullPointerException("nonNullParentField is marked non-null but is null"); } this.nonNullParentField$value = nonNullParentField; nonNullParentField$set = true; return self(); } @java.lang.Override @java.lang.SuppressWarnings("all") public java.lang.String toString() { return "SuperBuilderWithNonNull.Parent.ParentBuilder(nonNullParentField$value=" + this.nonNullParentField$value + ")"; } } @java.lang.SuppressWarnings("all") private static final class ParentBuilderImpl extends ParentBuilder<Parent, ParentBuilderImpl> { @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) { if (b.nonNullParentField$set) this.nonNullParentField = b.nonNullParentField$value; else this.nonNullParentField = Parent.$default$nonNullParentField(); if (nonNullParentField == null) { throw new java.lang.NullPointerException("nonNullParentField is marked non-null but is null"); } } @java.lang.SuppressWarnings("all") public static ParentBuilder<?, ?> builder() { return new ParentBuilderImpl(); } } public static class Child extends Parent { @lombok.NonNull String nonNullChildField; @java.lang.SuppressWarnings("all") public static abstract class ChildBuilder<C extends Child, B extends ChildBuilder<C, B>> extends Parent.ParentBuilder<C, B> { @java.lang.SuppressWarnings("all") private String nonNullChildField; @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 nonNullChildField(@lombok.NonNull final String nonNullChildField) { if (nonNullChildField == null) { throw new java.lang.NullPointerException("nonNullChildField is marked non-null but is null"); } this.nonNullChildField = nonNullChildField; return self(); } @java.lang.Override @java.lang.SuppressWarnings("all") public java.lang.String toString() { return "SuperBuilderWithNonNull.Child.ChildBuilder(super=" + super.toString() + ", nonNullChildField=" + this.nonNullChildField + ")"; } } @java.lang.SuppressWarnings("all") private static final class ChildBuilderImpl extends ChildBuilder<Child, ChildBuilderImpl> { @java.lang.SuppressWarnings("all") private ChildBuilderImpl() { } @java.lang.Override @java.lang.SuppressWarnings("all") protected ChildBuilderImpl self() { return this; } @java.lang.Override @java.lang.SuppressWarnings("all") public Child build() { return new Child(this); } } @java.lang.SuppressWarnings("all") protected Child(final ChildBuilder<?, ?> b) { super(b); this.nonNullChildField = b.nonNullChildField; if (nonNullChildField == null) { throw new java.lang.NullPointerException("nonNullChildField is marked non-null but is null"); } } @java.lang.SuppressWarnings("all") public static ChildBuilder<?, ?> builder() { return new ChildBuilderImpl(); } } public static void test() { Child x = Child.builder().nonNullChildField("child").nonNullParentField("parent").build(); } }