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1 public static class GenericBuilder
使用:{ 2 private final Supplier instantiate; 3 4 private final List > consumers = new ArrayList<>(); 5 6 public GenericBuilder(Supplier instantiate) { 7 this.instantiate = instantiate; 8 } 9 10 public static GenericBuilder of(Supplier instantiator) { 11 return new GenericBuilder<>(instantiator); 12 } 13 14 public GenericBuilder with(BiConsumer biConsumer, U value) { 15 Consumer setOperationFunction = instance -> biConsumer.accept(instance, value); 16 consumers.add(setOperationFunction); 17 return this; 18 } 19 20 public T build() { 21 T instance = instantiate.get(); 22 23 // loop call each set function with object instance!24 consumers.forEach(consumer -> consumer.accept(instance)); 25 consumers.clear(); 26 27 return instance; 28 } 29 } ![]()
1 public class Dummy { 2 private String name; 3 private Integer age; 4 private Boolean foreigner; 5 6 public String getName() { 7 return name; 8 } 9 10 public void setName(String name) { 11 this.name = name; 12 } 13 14 public Integer getAge() { 15 return age; 16 } 17 18 public void setAge(Integer age) { 19 this.age = age; 20 } 21 22 public Boolean getForeigner() { 23 return foreigner; 24 } 25 26 public void setForeigner(Boolean foreigner) { 27 this.foreigner = foreigner; 28 } 29 30 31 }
Dummy build = GenericBuilder.of(Dummy::new).with(Dummy::setAge, 12) .with(Dummy::setName,"Vodoo") .with(Dummy::setForeigner,false).build();
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