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Re: Java record

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On 01/03/2023 20:18, e.d.pro...@gmail.com wrote:
> I just saw they added a new thing called record to Java 16. Is this not a replacement for a DTO or am I missing something?
> I create a DTO class like:
> public class TestDTO {
> 	private String testField;
> 	public String getTestField() {
> 		return this.testField;
> 	}
> 	public void setTestField(String test) {
> 		this.testField = test;
> 	}
> }
> 
> I define a matching record definition like:
> public record TestRecordDTO(String testField) {
> 
> }
> 
> Now I try to test them:
>       public static void main(String[] args) {
>      	 TestRecordDTO rec = new TestRecordDTO("testrec");
>      	
>      	 TestDTO dto = new TestDTO();
>      	 dto.setTestField("testrec");
>      	
>      	 Gson gson = new Gson();
>      	 System.out.println(gson.toJson(rec)); // {"testField":"testrec"}
>      	 System.out.println(gson.toJson(dto)); // {"testField":"testrec"}
>      	 rec.testField();
>      	 dto.getTestField();
>      	
>      	 dto = gson.fromJson(gson.toJson(dto), TestDTO.class);
>      	 System.out.println(dto.getTestField()); // testrec
>      	 rec = gson.fromJson(gson.toJson(rec), TestRecordDTO.class); // throws AssertionError
>      	 System.out.println(rec);
>      }
>   
> In web, we use DTOs on the back end to pass data to and from the Javascript/Typescript on the front end. It looks like passing to the front end works, now how do we use it as a model to get the user input?

Note: if you do get an exception, you should at least state its message 
in your post.

According to the changelog, support for Java records has been added to 
Gson in version 2.10: 
<https://github.com/google/gson/releases?q=2.10&expanded=true>. Switch 
to that and you should be good to go.

-- 
DF.

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Java record "e.d.pro...@gmail.com" <e.d.programmer@gmail.com> - 2023-03-01 11:18 -0800
  Re: Java record Arne Vajhøj <arne@vajhoej.dk> - 2023-03-01 20:23 -0500
    Re: Java record "e.d.pro...@gmail.com" <e.d.programmer@gmail.com> - 2023-03-02 04:01 -0800
  Re: Java record Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2023-03-08 20:33 +0100
    Re: Java record "e.d.pro...@gmail.com" <e.d.programmer@gmail.com> - 2023-03-08 12:14 -0800
      Re: Java record Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2023-03-08 21:44 +0100
        Re: Java record "e.d.pro...@gmail.com" <e.d.programmer@gmail.com> - 2023-03-08 12:54 -0800
      Re: Java record Arne Vajhøj <arne@vajhoej.dk> - 2023-03-13 10:55 -0400
        Re: Java record "e.d.pro...@gmail.com" <e.d.programmer@gmail.com> - 2023-03-13 08:25 -0700
  Re: Java record Jason H <DarthPiriteze@deathstar.gal> - 2023-03-21 18:02 +0000
    Re: Java record "e.d.pro...@gmail.com" <e.d.programmer@gmail.com> - 2023-03-22 04:04 -0700

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