This is my first question, so please feel free to correct anything that I missed writing this question:)

I am having trouble with using the @Bulider with my DTO objects.
I have an abstract class “EventDTO” inherited by a class type “CreateTaskLogDTO“.

I have two constructors each on both classes. The constructors inside the CreateTaskLogDTO inherits the ones inside the EventDTO.

strangely, the constructor annotated with the
@Builder(builderMethodName = “buildWithSpecificParamsNoID”)
works properly, but the one with
@Builder(builderMethodName = “buildWithOperationStringID”)
fails to instantiate the following fields : String OperationString, Long id

Source code for EventDTO (parent class)

package com.wwme.wwme.log.domain.DTO;

import com.wwme.wwme.group.domain.Group;
import com.wwme.wwme.log.domain.OperationType;
import com.wwme.wwme.task.domain.Task;
import com.wwme.wwme.user.domain.User;
import lombok.*;
import lombok.experimental.SuperBuilder;

import java.time.LocalDateTime;

@Getter
@Setter
public abstract class EventDTO {

    public EventDTO(Long id, User user, Group group, OperationType operationTypeEnum, LocalDateTime operationTime, String operationString, Task task) {
        this.id = id;
        this.user = user;
        this.group = group;
        this.operationTypeEnum = operationTypeEnum;
        this.operationTime = operationTime;
        this.operationString = operationString;
        this.task = task;
    }

    public EventDTO(User user, Group group, OperationType operationTypeEnum, LocalDateTime operationTime, Task task) {
        this.user = user;
        this.group = group;
        this.operationTypeEnum = operationTypeEnum;
        this.operationTime = operationTime;
        this.task = task;
    }

    protected Long id;
    protected User user;
    protected Group group;
    protected Task task;
    protected OperationType operationTypeEnum;
    protected LocalDateTime operationTime;
    protected String operationString;


    //Calculate Operation String based on given parameters
    public abstract void setOperationStr();

    @Override
    public String toString() {
        return "EventDTO{" +
                "id=" + id +
                ", user=" + user.getNickname() +
                ", group=" + group.getGroupName() +
                ", task=" + task.getTaskName() +
                ", operationTypeEnum=" + operationTypeEnum +
                ", operationTime=" + operationTime +
                ", operationString='" + operationString + ''' +
                '}';
    }
    //set specific fields for 
    public abstract void setSpecificFields();
    public abstract String convertToString();
}

Source code for CreateTaskLogDTO (child class)

package com.wwme.wwme.log.domain.DTO;

import com.wwme.wwme.group.domain.Group;
import com.wwme.wwme.log.domain.OperationType;
import com.wwme.wwme.task.domain.Task;
import com.wwme.wwme.user.domain.User;
import lombok.*;
import lombok.experimental.SuperBuilder;
import lombok.extern.slf4j.Slf4j;

import java.time.LocalDateTime;

@Slf4j
@Getter
public class CreateTaskLogDTO extends EventDTO{
    private String newTaskName;

    @Builder(builderMethodName = "buildWithSpecificParamsNoID")
    public CreateTaskLogDTO(User user, Group group, OperationType operationTypeEnum, LocalDateTime operationTime, String newTaskName, Task task) {
        super(user, group, operationTypeEnum, operationTime, task);
        this.newTaskName = newTaskName;
        setOperationStr();
    }

    @Builder(builderMethodName = "buildWithOperationStringID") //buildWithOperationStringID
    public CreateTaskLogDTO(Long id, User user, Group group, OperationType operationTypeEnum, LocalDateTime operationTime, String operationString, Task task) {
        super(id, user, group, operationTypeEnum, operationTime, operationString, task);
        setSpecificFields();
    }

    @Override
    public String toString() {

        return super.toString() +  "CreateTaskLogDTO{" +
                "newTaskName='" + newTaskName + ''' +
                ", operationString='" + operationString + ''' +
                '}';
    }

    @Override
    public void setOperationStr() {
        this.operationString = newTaskName;
    }

    @Override
    public void setSpecificFields() {
        this.newTaskName = this.getOperationString();
    }

    @Override
    public String convertToString() {
        log.info(this.getUser().getNickname());
        log.info(this.getNewTaskName());

        return """ + this.getUser().getNickname() + "" 님이 " + """ + this.getNewTaskName() +"""
                + "과제를 생성하였습니다.";

    }


}

Thanks!

I tried to running test codes to properly identify the problem.

This is the test that does not work (using the buildWithOperationStringID builder method)
it fails to set up the fields : Id and OperationString. everything else sets up fine.

   @Test
    void createTaskLogDTO_builder_withID_test(){
        String operationString = "Task1";
        LocalDateTime now = LocalDateTime.now();

        when(mockTask.getTaskName()).thenReturn("Task1");
        when(mockUser.getNickname()).thenReturn("User1");
        when(mockGroup.getGroupName()).thenReturn("Group1");

        CreateTaskLogDTO createTaskLogDTO =  CreateTaskLogDTO.buildWithOperationStringID()
                .id(1L)
                .task(mockTask)
                .user(mockUser)
                .group(mockGroup)
                .operationString(operationString)
                .operationTime(now)
                .operationTypeEnum(OperationType.CREATE_TASK)
                .build();

        assertEquals(createTaskLogDTO.getId(),1L);
        assertEquals(createTaskLogDTO.getTask().getTaskName(),mockTask.getTaskName());
        assertEquals(createTaskLogDTO.getUser().getNickname(),mockUser.getNickname());
        assertEquals(createTaskLogDTO.getGroup().getGroupName(),mockGroup.getGroupName());
        assertEquals(createTaskLogDTO.getOperationTime(),now);
        assertEquals(createTaskLogDTO.getOperationTypeEnum(),OperationType.CREATE_TASK);
        assertEquals(operationString,createTaskLogDTO.getOperationString());
    }

And this is the test of the builder method that works (buildWithSpecificParamsNoID)
It properly sets all fields.

    @Test
    void createTaskLogDTO_build_withoutID_test(){
        when(mockTask.getTaskName()).thenReturn("Task1");
        when(mockUser.getNickname()).thenReturn("User1");
        when(mockGroup.getGroupName()).thenReturn("Group1");

        String operationString = "Task1";
        LocalDateTime now = LocalDateTime.now();

        CreateTaskLogDTO createTaskLogDTO = CreateTaskLogDTO.buildWithSpecificParamsNoID()
                .task(mockTask)
                .user(mockUser)
                .group(mockGroup)
                .operationTime(now)
                .operationTypeEnum(OperationType.CREATE_TASK)
                .newTaskName(mockTask.getTaskName())
                .build();

        assertEquals(createTaskLogDTO.getTask().getTaskName(),mockTask.getTaskName());
        assertEquals(createTaskLogDTO.getUser().getNickname(),mockUser.getNickname());
        assertEquals(createTaskLogDTO.getGroup().getGroupName(),mockGroup.getGroupName());
        assertEquals(createTaskLogDTO.getOperationTime(),now);
        assertEquals(createTaskLogDTO.getOperationTypeEnum(),OperationType.CREATE_TASK);
        assertEquals(operationString,createTaskLogDTO.getOperationString());
        assertEquals(mockTask.getTaskName(),createTaskLogDTO.getNewTaskName());

    }