java - Lombok - 在构造函数输入参数中保留字段的注释

Question

Lombok 在自动生成构造函数时错过了字段的注释。有没有办法在构造函数输入参数中保留字段的注释？

生成构造函数的类，

@RequiredArgsConstructor(onConstructor = @__(@Inject))
public class Test {

    @Named("MyField")
    private final String field;
    @Named("MyHandler")
    private final SomeHandler handler;
}

生成的类:

public class Test {

    @Named("MyField")
    private final String field;
    @Named("MyField")
    private final SomeHandler handler;

    @Inject
    public Test(final String field, final SomeHandler handler) {
        this.field = field;
        this.handler = handler;
    }
}

想要的类(class):

public class Test {

    @Named("MyField")
    private final String field;
    @Named("MyHandler")
    private final SomeHandler handler;

    @Inject
    public Test(@Named("MyField")final String field, 
                @Named("MyHandler")final SomeHandler handler) {
        this.field = field;
        this.handler = handler;
    }

}

Answer 1

在版本 v1.18.4 中Lombok 添加了对复制特定注释的支持。意思是，如果您将以下设置放入 lombok.config:

lombok.copyableAnnotations += com.google.inject.name.Named

并将以下 Lombok 注释应用到您的类(class):

@RequiredArgsConstructor(onConstructor = @__(@Inject))
public class Hello {
    @NonNull @Named("my-name") String name;
}

应该将 @Named 注释复制到生成的构造函数参数中。

限制:这在 annotation can't be put on a field 时不起作用或 annotation on a field overrides constructor initialization