Lombok Builder不工作
Lombok Builder不工作
提问于 2018-06-03 22:04:59
我有一个基类
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class FurnitureBillingRequest implements JSONAble<FurnitureBillingRequest> {
private static final Gson gsonSerializer;
static {
gsonSerializer = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
}
@Expose
protected String name;
@Expose
protected long date;
@Expose
protected String phone;
@Expose
protected List<BillItemRO> items;
@Expose
protected int totalAmount;
@Expose
protected int amountPaid;
@Expose
protected String remark;
@Expose
protected String address;
public FurnitureBillingRequest(String name, long date, String phone, int totalAmount,
int amountPaid, String remark, String address) {
this(name, date, phone, new ArrayList<>(), totalAmount, amountPaid, remark, address);
}
public String toJson() {
return gsonSerializer.toJson(this);
}
public FurnitureBillingRequest toObject(String json) {
return gsonSerializer.fromJson(json, FurnitureBillingRequest.class);
}
@Override
public boolean equals(Object that) {
if (!(that instanceof FurnitureBillingRequest)) {
return false;
}
FurnitureBillingRequest thatFurnitureBillingRequest = (FurnitureBillingRequest) that;
if (!StringUtils.equals(this.name, thatFurnitureBillingRequest.name)) return false;
if (this.date != thatFurnitureBillingRequest.date) return false;
if (!StringUtils.equals(this.phone, thatFurnitureBillingRequest.phone)) return false;
if (!this.items.equals(thatFurnitureBillingRequest.items)) return false;
if (this.totalAmount != thatFurnitureBillingRequest.totalAmount) return false;
if (this.amountPaid != thatFurnitureBillingRequest.amountPaid) return false;
return true;
}
}和一个子类，如下所示
@Getter
@Setter
@NoArgsConstructor
public class UpdateBillRequest extends FurnitureBillingRequest {
private static final Gson gsonSerializer;
static {
gsonSerializer = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
}
@Expose
private String uid;
@Builder
public UpdateBillRequest(String uid, String name, long date, String phone, List<BillItemRO> items, int totalAmount, int amountPaid, String remark, String address) {
super(name, date, phone, items, totalAmount, amountPaid, remark, address);
this.uid = uid;
}
public UpdateBillRequest(String uid, String name, long date, String phone, int totalAmount, int amountPaid, String remark, String address) {
super(name, date, phone, totalAmount, amountPaid, remark, address);
this.uid = uid;
}
public String toJson() {
return gsonSerializer.toJson(this);
}
public FurnitureBillingRequest toObject(String json) {
return gsonSerializer.fromJson(json, FurnitureBillingRequest.class);
}
}我写了一个单元测试来检查json的创建是否正确。
public class UpdateBillRequestTest {
@Test
public void toJson() {
UpdateBillRequest request = UpdateBillRequest.builder()
.date(1234567868L)
.uid("9i09909-90i90-8u90")
.name("kuldeep")
.phone("9535580366")
.build();
System.out.println(request.toJson());
}
@Test
public void toObject() {
}
}但是，当我尝试编译代码时，它最终变成了错误
错误com.tarkshala.services.lambda.model.UpdateBillRequest中的/Users/kuldeep/Work/Repositories/billing/BillingModel/src/main/java/com/tarkshala/services/lambda/model/UpdateBillRequest.java:24,5构建器()无法覆盖com.tarkshala.services.lambda.model.FurnitureBillingRequest中的构建器()错误返回类型com.tarkshala.services.lambda.model.UpdateBillRequest.UpdateBillRequestBuilder与com.tarkshala.services.lambda.model.FurnitureBillingRequest.FurnitureBillingRequestBuilder不兼容
我不知道哪里出了问题？
回答 1
Stack Overflow用户
发布于 2018-06-04 04:19:06
这是Java中的一个限制。尝试编译以下代码：
class Foo {
public static FooBuilder builder() {
return new FooBuilder();
}
}
class Bar extends Foo {
public static BarBuilder builder() {
return new BarBuilder();
}
}
class FooBuilder {
public Foo build() {
return new Foo();
}
}
class BarBuilder {
public Bar build() {
return new Bar();
}
}经典构建器模式，但我省略了所有属性。
现在eclipse告诉我Bar.builder()的“返回类型与Foo.builder()不兼容”
您不能使用具有不兼容返回类型的重载方法。这甚至适用于静态方法。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50667236
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