Lombok: @Builder 注释丢失字段默认值

创建于 2016-07-28 · 3评论 · 资料来源: projectlombok/lombok

public class BuilderAnnotationTest {

    <strong i="5">@Test</strong>
    public void defalutValue() throws Exception {
        assertThat(Entity.builder().build().isSingle()).isTrue();
    }
}

<strong i="6">@Getter</strong>
<strong i="7">@Builder</strong>
class Entity{
    private String name;
    private boolean single = true;
}

资料来源

gardenias

最有用的评论

重复#916。有一个解决方法

<strong i="6">@Getter</strong>
@Builder(toBuilder=true)
<strong i="7">@AllArgsConstructor</strong>
@NoArgsConstructor(access=AccessLevel.PRIVATE)
public class Entity {
    public static EntityBuilder builder() {
        return PROTOTYPE.toBuilder();
    }

    private static final Entity PROTOTYPE = new Entity();

    private String name;
    private boolean single = true;
}

Maaartinus 于 2016-07-28

👍6

所有3条评论

重复#916。有一个解决方法

<strong i="6">@Getter</strong>
@Builder(toBuilder=true)
<strong i="7">@AllArgsConstructor</strong>
@NoArgsConstructor(access=AccessLevel.PRIVATE)
public class Entity {
    public static EntityBuilder builder() {
        return PROTOTYPE.toBuilder();
    }

    private static final Entity PROTOTYPE = new Entity();

    private String name;
    private boolean single = true;
}

Maaartinus 于 2016-07-28

👍6

这也有效

public class BuilderAnnotationTest {

    <strong i="6">@Test</strong>
    public void defalutValue() throws Exception {
        assertThat(new Entity().toBuilder().build().isSingle()).isTrue(); // note the "new" here
    }
}

<strong i="7">@Getter</strong>
@Builder(toBuilder = true)
class Entity{
    private String name;
    private boolean single = true;
}

kishaningithub 于 2017-07-20

使用@Builder.Default来解决这个问题。

rzwitserloot 于 2018-10-15

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Lombok: @Builder 注释丢失字段默认值

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