我声明了两个类,它们具有相同的成员,但由于某些原因而分开。我实现了一个util类,将这2个类转换为1个相同的类,如下所示。
@Data
@Builder
public class VO1 {
private int id;
private String value1;
private String value2;
...
private String value20;
}
@Data
@Builder
public class VO2 {
private int id;
private String value1;
private String value2;
...
private String value20;
}
@Data
@Builder
public class DomainEntity {
private int id;
private String value1;
private String value2;
...
private String value15;
}
public class Converter {
public static DomainEntity fromVO1(VO1 vo1) {
return DomainEntity.builder.id(vo1.getId())
.value1(vo1.getValue1())
.value2(vo1.getValue2())
...
.value15(vo1.getValue15())
.build();
}
public static DomainEntity fromVO2(VO2 vo2) {
return DomainEntity.builder.id(vo2.getId())
.value1(vo2.getValue1())
.value2(vo2.getValue2())
...
.value15(vo2.getValue15())
.build();
}
}
现在我在“转换器”中有重复的代码,我想消除它们。当然我知道我可以使用继承将其删除。但是,我也想使用“ Lombok”,因为这些类具有许多属性。使用继承可以使用“ Lombok”信使。有谁知道解决这种情况的优雅方法?
谢谢。
答案 0 :(得分:1)
我使用继承尝试了您的示例,我不觉得代码变得更混乱,我缺少什么了吗?
对于继承,您可以使用实验性的@SuperBuilder
package lombok;
@Getter
@Setter
@SuperBuilder
public class BaseVO {
private String s1;
private String s2;
private String s3;
private String s4;
private String s5;
private String s6;
private String s7;
private String s8;
private String s9;
}
package lombok;
@Getter
@Setter
@SuperBuilder
public class VO1 extends BaseVO{
private String vo1Specific;
}
package lombok;
@Getter
@Setter
@SuperBuilder
public class VO2 extends BaseVO {
private String vo2Specific;
}
package lombok;
@Builder
@ToString
public class DomainEntity {
private String s1;
private String s2;
private String s3;
private String s4;
private String s5;
private String s6;
private String s7;
private String s8;
private String s9;
private String specific;
}
package lombok;
import lombok.DomainEntity.DomainEntityBuilder;
public class Converter {
public static <T extends BaseVO> DomainEntity fromVO(T basevo) {
DomainEntityBuilder builder = DomainEntity.builder();
builder.s1(basevo.getS1()).s2(basevo.getS2()).s3(basevo.getS3());
if (basevo instanceof VO1) {
VO1 vo1 = (VO1) basevo;
builder.specific(vo1.getVo1Specific());
}
if (basevo instanceof VO2) {
VO2 vo1 = (VO2) basevo;
builder.specific(vo1.getVo2Specific());
}
return builder.build();
}
}
package lombok;
public class App {
public static void main(String[] args) {
VO1 vo1 = VO1.builder().s1("VO1S1").vo1Specific("VO1 specific property").build();
VO2 vo2 = VO2.builder().s1("VO2S1").vo2Specific("VO2 specific property").build();
DomainEntity d1 = Converter.<VO1>fromVO(vo1);
System.out.println(" d1 " + d1);
DomainEntity d2 = Converter.<VO2>fromVO(vo2);
System.out.println(" d2 " + d2);
}
}
答案 1 :(得分:0)
您需要为所有值创建一个带有getter的接口,然后两个值对象都应实现该接口。然后,在Converter中,您可以通过一种方法来使用对该接口的引用,该方法可以重复使用两次。