Java 8 consumer风格Builder

public static class GenericBuilder<T> {
        private final Supplier<T> instantiate;

        private final List<Consumer<T>> consumers = new ArrayList<>();

        public GenericBuilder(Supplier<T> instantiate) {
            this.instantiate = instantiate;
        }

        public static <T> GenericBuilder<T> of(Supplier<T> instantiator)  {
            return new GenericBuilder<>(instantiator);
        }

        public <U> GenericBuilder<T> with(BiConsumer<T, U> biConsumer, U value) {
            Consumer<T> setOperationFunction = instance -> biConsumer.accept(instance, value);
            consumers.add(setOperationFunction);
            return this;
        }

        public T build() {
            T instance = instantiate.get();

            // loop call each set function with object instance!
            consumers.forEach(consumer -> consumer.accept(instance));
            consumers.clear();

            return instance;
        }
    }

使用：

public class Dummy {
        private String name;
        private Integer age;
        private Boolean foreigner;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }

        public Integer getAge() {
            return age;
        }

        public void setAge(Integer age) {
            this.age = age;
        }

        public Boolean getForeigner() {
            return foreigner;
        }

        public void setForeigner(Boolean foreigner) {
            this.foreigner = foreigner;
        }


    }

Dummy build = GenericBuilder.of(Dummy::new).with(Dummy::setAge, 12)
                .with(Dummy::setName, "Vodoo")
                .with(Dummy::setForeigner, false).build();