import java.util.List; public class SuperBuilderWithGenerics { public static @lombok.experimental.SuperBuilder class Parent<A> { public static abstract @java.lang.SuppressWarnings("all") class ParentBuilder<A, C extends SuperBuilderWithGenerics.Parent<A>, B extends SuperBuilderWithGenerics.Parent.ParentBuilder<A, C, B>> { private @java.lang.SuppressWarnings("all") A field1; private @java.lang.SuppressWarnings("all") java.util.ArrayList<String> items; public ParentBuilder() { super(); } protected abstract @java.lang.SuppressWarnings("all") B self(); public abstract @java.lang.SuppressWarnings("all") C build(); public @java.lang.SuppressWarnings("all") B field1(final A field1) { this.field1 = field1; return self(); } public @java.lang.SuppressWarnings("all") B item(final String item) { if ((this.items == null)) this.items = new java.util.ArrayList<String>(); this.items.add(item); return self(); } public @java.lang.SuppressWarnings("all") B items(final java.util.Collection<? extends String> items) { if ((items == null)) { throw new java.lang.NullPointerException("items cannot be null"); } if ((this.items == null)) this.items = new java.util.ArrayList<String>(); this.items.addAll(items); return self(); } public @java.lang.SuppressWarnings("all") B clearItems() { if ((this.items != null)) this.items.clear(); return self(); } public @java.lang.Override @java.lang.SuppressWarnings("all") java.lang.String toString() { return (((("SuperBuilderWithGenerics.Parent.ParentBuilder(field1=" + this.field1) + ", items=") + this.items) + ")"); } } private static final @java.lang.SuppressWarnings("all") class ParentBuilderImpl<A> extends SuperBuilderWithGenerics.Parent.ParentBuilder<A, SuperBuilderWithGenerics.Parent<A>, SuperBuilderWithGenerics.Parent.ParentBuilderImpl<A>> { private ParentBuilderImpl() { super(); } protected @java.lang.Override @java.lang.SuppressWarnings("all") SuperBuilderWithGenerics.Parent.ParentBuilderImpl<A> self() { return this; } public @java.lang.Override @java.lang.SuppressWarnings("all") SuperBuilderWithGenerics.Parent<A> build() { return new SuperBuilderWithGenerics.Parent<A>(this); } } A field1; @lombok.Singular List<String> items; protected @java.lang.SuppressWarnings("all") Parent(final SuperBuilderWithGenerics.Parent.ParentBuilder<A, ?, ?> b) { super(); this.field1 = b.field1; java.util.List<String> items; switch (((b.items == null) ? 0 : b.items.size())) { case 0 : items = java.util.Collections.emptyList(); break; case 1 : items = java.util.Collections.singletonList(b.items.get(0)); break; default : items = java.util.Collections.unmodifiableList(new java.util.ArrayList<String>(b.items)); } this.items = items; } public static @java.lang.SuppressWarnings("all") <A>SuperBuilderWithGenerics.Parent.ParentBuilder<A, ?, ?> builder() { return new SuperBuilderWithGenerics.Parent.ParentBuilderImpl<A>(); } } public static @lombok.experimental.SuperBuilder class Child<A> extends Parent<A> { public static abstract @java.lang.SuppressWarnings("all") class ChildBuilder<A, C extends SuperBuilderWithGenerics.Child<A>, B extends SuperBuilderWithGenerics.Child.ChildBuilder<A, C, B>> extends Parent.ParentBuilder<A, C, B> { private @java.lang.SuppressWarnings("all") double field3; public ChildBuilder() { super(); } protected abstract @java.lang.Override @java.lang.SuppressWarnings("all") B self(); public abstract @java.lang.Override @java.lang.SuppressWarnings("all") C build(); public @java.lang.SuppressWarnings("all") B field3(final double field3) { this.field3 = field3; return self(); } public @java.lang.Override @java.lang.SuppressWarnings("all") java.lang.String toString() { return (((("SuperBuilderWithGenerics.Child.ChildBuilder(super=" + super.toString()) + ", field3=") + this.field3) + ")"); } } private static final @java.lang.SuppressWarnings("all") class ChildBuilderImpl<A> extends SuperBuilderWithGenerics.Child.ChildBuilder<A, SuperBuilderWithGenerics.Child<A>, SuperBuilderWithGenerics.Child.ChildBuilderImpl<A>> { private ChildBuilderImpl() { super(); } protected @java.lang.Override @java.lang.SuppressWarnings("all") SuperBuilderWithGenerics.Child.ChildBuilderImpl<A> self() { return this; } public @java.lang.Override @java.lang.SuppressWarnings("all") SuperBuilderWithGenerics.Child<A> build() { return new SuperBuilderWithGenerics.Child<A>(this); } } double field3; protected @java.lang.SuppressWarnings("all") Child(final SuperBuilderWithGenerics.Child.ChildBuilder<A, ?, ?> b) { super(b); this.field3 = b.field3; } public static @java.lang.SuppressWarnings("all") <A>SuperBuilderWithGenerics.Child.ChildBuilder<A, ?, ?> builder() { return new SuperBuilderWithGenerics.Child.ChildBuilderImpl<A>(); } } public SuperBuilderWithGenerics() { super(); } public static void test() { Child<Integer> x = Child.<Integer>builder().field3(0.0).field1(5).item("").build(); } }