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[英]Using Lombok @SuperBuilder annotation with toBuilder on an abstract class?
[英]Using SuperBuilder to extend parent class using Lombok
我有一个使用 Lombok 功能的 DTO,如下所示。但现在由于某些要求,我不得不将我的 DTO 扩展到父 class,如下所示。如何在我的 DTO 中做最小的更改以支持它。我尝试使用@SuperBuilder 注释,但它失败了。
DTO 之前:
@Getter
@ToString
@EqualsAndHashCode
@Builder(toBuilder = true)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
public class RequestMessage {
private final String name;
}
需要扩展的父 Class
@Data
@SuperBuilder(toBuilder = true)
@JsonDeserialize(builder = MyDTO.Builder.class)
public abstract class MyDTO implements Serializable {
@JsonIgnore private final ObjectMapper objectMapper = new ObjectMapper();
protected String myAccountId;
protected MyDTO() {}
public static int hashCode(Object... objects) {
return Arrays.deepHashCode(objects);
}
public static boolean equal(Object o1, Object o2) {
// implementation of equals method
}
public abstract String emitSerializedPayload() throws JsonProcessingException;
@JsonPOJOBuilder(withPrefix = "")
protected abstract static class Builder<T extends MyDTO, B extends Builder<T, B>> {
protected T dtoInstance;
protected B builderInstance;
public Builder() {
dtoInstance = createDtoInstance();
builderInstance = returnBuilderInstance();
}
protected abstract T createDtoInstance();
protected abstract B returnBuilderInstance();
public B myAccountId(String accountId) {
dtoInstance.myAccountId = accountId;
return builderInstance;
}
public T build() {
return dtoInstance;
}
}
}
我尝试手动构建 RequestMessageClass 并且它工作正常,但是我的应用程序中有很多类,我不想手动更改它们,如何使用注释或一些最小更改来更改现有的 RequestMessage class 以使其工作。
这是我尝试过的,但是在执行此操作时出现编译错误
RequestMessage.Builder().name(myName).myAccountId(myAcId).build();
我尝试的如下所示:
@Getter
@ToString
@EqualsAndHashCode(callSuper = true)
@SuperBuilder(toBuilder = true)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
public class RequestMessage extends MyDTO {
private final String name;
@Override
public String emitSerializedPayload() throws JsonProcessingException {
// TODO Auto-generated method stub
return null;
}
}
您不应该将@Builder
与 static 内部 Builder class 混合。 如果可以摆脱Builder
class,下一个代码应该可以工作。
请求消息:
@Getter
@ToString
@EqualsAndHashCode(callSuper = true)
@SuperBuilder(toBuilder = true)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
public class RequestMessage extends MyDTO {
private final String name;
@Override
public String emitSerializedPayload() throws JsonProcessingException {
return null;
}
public RequestMessage(String myAccountId, String name) {
super(myAccountId);
this.name = name;
}
}
我的DTO :
@Data
@SuperBuilder(toBuilder = true)
public abstract class MyDTO implements Serializable {
@JsonIgnore private final ObjectMapper objectMapper = new ObjectMapper();
protected String myAccountId;
protected MyDTO() {}
public MyDTO(String myAccountId) {
this.myAccountId = myAccountId;
}
public static int hashCode(Object... objects) {
return Arrays.deepHashCode(objects);
}
public static boolean equal(Object o1, Object o2) {
// implementation of equals method
return false;
}
public abstract String emitSerializedPayload() throws JsonProcessingException;
}
测试:
@Test
void name() {
String myName = "myName";
String myAccountId = "myAccountId";
var request = RequestMessage.builder().name(myName).myAccountId(myAccountId).build();
System.out.println("request = " + request);
RequestMessage requestMessage = new RequestMessage(myAccountId, myName);
}
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