import java.util.Map; public class SuperBuilderWithGenericsAndToBuilder { public static class Parent<A> { A field1; Map<Integer, String> items; @java.lang.SuppressWarnings("all") public static abstract class ParentBuilder<A, C extends SuperBuilderWithGenericsAndToBuilder.Parent<A>, B extends SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder<A, C, B>> { @java.lang.SuppressWarnings("all") private A field1; @java.lang.SuppressWarnings("all") private java.util.ArrayList<Integer> items$key; @java.lang.SuppressWarnings("all") private java.util.ArrayList<String> items$value; @java.lang.SuppressWarnings("all") protected B $fillValuesFrom(final C instance) { SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder.$fillValuesFromInstanceIntoBuilder(instance, this); return self(); } @java.lang.SuppressWarnings("all") private static <A> void $fillValuesFromInstanceIntoBuilder(final SuperBuilderWithGenericsAndToBuilder.Parent<A> instance, final SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder<A, ?, ?> b) { b.field1(instance.field1); b.items(instance.items == null ? java.util.Collections.<Integer, String>emptyMap() : instance.items); } @java.lang.SuppressWarnings("all") protected abstract B self(); @java.lang.SuppressWarnings("all") public abstract C build(); /** * @return {@code this}. */ @java.lang.SuppressWarnings("all") public B field1(final A field1) { this.field1 = field1; return self(); } @java.lang.SuppressWarnings("all") public B item(final Integer itemKey, final String itemValue) { if (this.items$key == null) { this.items$key = new java.util.ArrayList<Integer>(); this.items$value = new java.util.ArrayList<String>(); } this.items$key.add(itemKey); this.items$value.add(itemValue); return self(); } @java.lang.SuppressWarnings("all") public B items(final java.util.Map<? extends Integer, ? extends String> items) { if (items == null) { throw new java.lang.NullPointerException("items cannot be null"); } if (this.items$key == null) { this.items$key = new java.util.ArrayList<Integer>(); this.items$value = new java.util.ArrayList<String>(); } for (final java.util.Map.Entry<? extends Integer, ? extends String> $lombokEntry : items.entrySet()) { this.items$key.add($lombokEntry.getKey()); this.items$value.add($lombokEntry.getValue()); } return self(); } @java.lang.SuppressWarnings("all") public B clearItems() { if (this.items$key != null) { this.items$key.clear(); this.items$value.clear(); } return self(); } @java.lang.Override @java.lang.SuppressWarnings("all") public java.lang.String toString() { return "SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder(field1=" + this.field1 + ", items$key=" + this.items$key + ", items$value=" + this.items$value + ")"; } } @java.lang.SuppressWarnings("all") private static final class ParentBuilderImpl<A> extends SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder<A, SuperBuilderWithGenericsAndToBuilder.Parent<A>, SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilderImpl<A>> { @java.lang.SuppressWarnings("all") private ParentBuilderImpl() { } @java.lang.Override @java.lang.SuppressWarnings("all") protected SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilderImpl<A> self() { return this; } @java.lang.Override @java.lang.SuppressWarnings("all") public SuperBuilderWithGenericsAndToBuilder.Parent<A> build() { return new SuperBuilderWithGenericsAndToBuilder.Parent<A>(this); } } @java.lang.SuppressWarnings("all") protected Parent(final SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder<A, ?, ?> b) { this.field1 = b.field1; java.util.Map<Integer, String> items; switch (b.items$key == null ? 0 : b.items$key.size()) { case 0: items = java.util.Collections.emptyMap(); break; case 1: items = java.util.Collections.singletonMap(b.items$key.get(0), b.items$value.get(0)); break; default: items = new java.util.LinkedHashMap<Integer, String>(b.items$key.size() < 1073741824 ? 1 + b.items$key.size() + (b.items$key.size() - 3) / 3 : java.lang.Integer.MAX_VALUE); for (int $i = 0; $i < b.items$key.size(); $i++) items.put(b.items$key.get($i), (String) b.items$value.get($i)); items = java.util.Collections.unmodifiableMap(items); } this.items = items; } @java.lang.SuppressWarnings("all") public static <A> SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder<A, ?, ?> builder() { return new SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilderImpl<A>(); } @java.lang.SuppressWarnings("all") public SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilder<A, ?, ?> toBuilder() { return new SuperBuilderWithGenericsAndToBuilder.Parent.ParentBuilderImpl<A>().$fillValuesFrom(this); } } public static class Child<A> extends Parent<A> { double field3; @java.lang.SuppressWarnings("all") public static abstract class ChildBuilder<A, C extends SuperBuilderWithGenericsAndToBuilder.Child<A>, B extends SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder<A, C, B>> extends Parent.ParentBuilder<A, C, B> { @java.lang.SuppressWarnings("all") private double field3; @java.lang.Override @java.lang.SuppressWarnings("all") protected B $fillValuesFrom(final C instance) { super.$fillValuesFrom(instance); SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder.$fillValuesFromInstanceIntoBuilder(instance, this); return self(); } @java.lang.SuppressWarnings("all") private static <A> void $fillValuesFromInstanceIntoBuilder(final SuperBuilderWithGenericsAndToBuilder.Child<A> instance, final SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder<A, ?, ?> b) { b.field3(instance.field3); } @java.lang.Override @java.lang.SuppressWarnings("all") protected abstract B self(); @java.lang.Override @java.lang.SuppressWarnings("all") public abstract C build(); /** * @return {@code this}. */ @java.lang.SuppressWarnings("all") public B field3(final double field3) { this.field3 = field3; return self(); } @java.lang.Override @java.lang.SuppressWarnings("all") public java.lang.String toString() { return "SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder(super=" + super.toString() + ", field3=" + this.field3 + ")"; } } @java.lang.SuppressWarnings("all") private static final class ChildBuilderImpl<A> extends SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder<A, SuperBuilderWithGenericsAndToBuilder.Child<A>, SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilderImpl<A>> { @java.lang.SuppressWarnings("all") private ChildBuilderImpl() { } @java.lang.Override @java.lang.SuppressWarnings("all") protected SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilderImpl<A> self() { return this; } @java.lang.Override @java.lang.SuppressWarnings("all") public SuperBuilderWithGenericsAndToBuilder.Child<A> build() { return new SuperBuilderWithGenericsAndToBuilder.Child<A>(this); } } @java.lang.SuppressWarnings("all") protected Child(final SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder<A, ?, ?> b) { super(b); this.field3 = b.field3; } @java.lang.SuppressWarnings("all") public static <A> SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder<A, ?, ?> builder() { return new SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilderImpl<A>(); } @java.lang.SuppressWarnings("all") public SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilder<A, ?, ?> toBuilder() { return new SuperBuilderWithGenericsAndToBuilder.Child.ChildBuilderImpl<A>().$fillValuesFrom(this); } } public static void test() { Child<Integer> x = Child.<Integer>builder().field3(0.0).field1(5).item(5, "").build().toBuilder().build(); } }