[BUG] @SuperBuilder error info : java: incompatible type: capture#1, total? cannot be converted to

[killerover84]

use @SuperBuilder report error : java: incompatible type: capture#1, total? cannot be converted to

[janrieke]

We need an example to reproduce.

[killerover84]

@SuperBuilder public class A { private String a; } @SuperBuilder public class B extends A{ public static void main(String[] args) { B b = B.builder().a("test").build(); System.out.println(b.toString()); } } run error info:        java: incompatible type: capture#1, total? cannot be converted to xxx.xxxx.B

…

------------------&nbsp;原始邮件&nbsp;------------------ 发件人: "rzwitserloot/lombok" <notifications@github.com&gt;; 发送时间:&nbsp;2021年1月12日(星期二) 下午2:15 收件人:&nbsp;"rzwitserloot/lombok"<lombok@noreply.github.com&gt;; 抄送:&nbsp;"工布"<272040138@qq.com&gt;;"Author"<author@noreply.github.com&gt;; 主题:&nbsp;Re: [rzwitserloot/lombok] [BUG] @SuperBuilder error info : java: incompatible type: capture#1, total? cannot be converted to (#2708) We need an example to reproduce. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[arsalans]

Is there any work going on this issue with SuperBuilder? Running into the same issue:

incompatible types: java.util.List<capture#1 of ?> cannot be converted to java.util.List<com.company.MyObject>

[janrieke]

Difficult to say without source code. You probably have a type parameter on your class and javac is unable to infer the type through your chained builder method calls. Add a type hint to your builder() method call.

[arsalans]

Sorry, how do you add a type hint to a Builder()?

[janrieke]

You should post your code.

[arsalans]

Alright, I have a TestResponse class that is annotated as follows:

@Data
@NoArgsConstructor
@AllArgsConstructor
@SuperBuilder
@EqualsAndHashCode(callSuper = true)
@JsonInclude(JsonInclude.Include.NON_NULL)
public class TestResponse extends SomeParent {

    private Integer autoNumber;
    private List<String> autoDischarges;

}

I am using this class like this (returning as a response object):

public List<TestResponse> getAutoDischarges() {
       List<String> allRecords = List.of(**Something**);
       return allRecords 
               .stream()
               .map(driver -> TestResponse
                       .builder()
                       .autoDischarges(List.of(**something else**))
                       .autoNumber(1)
                       .build())
               .toList();
   }

The above code has a compile error saying the following:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.11.0:compile (default-compile) on project p**d: Compilation failure
[ERROR] /C**.java:[65,24] incompatible types: java.util.List<capture#1 of ?> cannot be converted to java.util.List<com.****.TestResponse>

[janrieke]

public List<TestResponse> getAutoDischarges() {
    List<String> allRecords = List.of();
    return allRecords 
            .stream()
            .<TestResponse>map(driver -> TestResponse
                    .builder()
                    .autoDischarges(List.of())
                    .autoNumber(1)
                    .build())
            .toList();
}

[janrieke]

BTW: The code from the original poster compiles and works, so this issue can be closed. Probably a bug from the early days of IntelliJ's @SuperBuilder support.

[dding94]

@arsalans

If you check the ByteCode of the Builder that is created when you declare SuperBuilder, you can see that it uses wildcards, so you need to explicitly declare the type to prevent type casting in stream operations.