nazar_art :
I am using Lombok for my project. My model looks like:
@Builder
@Data @AllArgsConstructor
public class ScreenDefinitionDTO {
@Singular
private List<ScreenDeclaration> screens;
}
I want to do next operation:
String screenName = ctx.screenName().getText();
ScreenDeclaration declaration = ParsingUtils
.buildScreenDeclaration(StringUtils.trim(screenName));
Where instance is created:
public static ScreenDefinitionDTO buildEmptyScreenDTO() {
return ScreenDefinitionDTO.builder()
.screens(new ArrayList<>())
.build();
}
Finally, I got:
Exception in thread "main" java.lang.UnsupportedOperationException
at java.util.AbstractList.add(AbstractList.java:148)
at java.util.AbstractList.add(AbstractList.java:108)
When I changed creating the instance without Lombok builder pattern everything is fine:
public static ScreenDefinitionDTO buildEmptyScreenDTO() {
return new ScreenDefinitionDTO(new ArrayList<>());
}
I couldn't understand what is wrong with Lombok's builder pattern?
yanefedor :
Due to GitHub issue
Lombok
@Builder
is primarily meant for immutables (and uses either Collections.unmodifiableList or Guava's ImmutableList
that's why you have UnsupportedOperationException
For greater certainty reproduce full code pattern where you have exception please.
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