[BUG] Eclipse handlers don't support enum constants

[vladtimofeev000]

Describe the bug
For enum constants JDT leaves null TypeReference in org.eclipse.jdt.internal.compiler.ast.FieldDeclaration, but lombok.eclipse.handlers.HandleGetter doesn't ready for it so there will be several problems:

1. NPE at isBoolean
2. Null return type at createGetter so it will be generated as void method
3. Not static modifier

Looks like It can be reproduced with other annotation handlers.

To Reproduce
Case:

public enum EnumTest {
    @Getter
    AAA
}

Result:

Lombok annotation handler class lombok.eclipse.handlers.HandleGetter failed
java.lang.NullPointerException
at lombok.eclipse.handlers.EclipseHandlerUtil.isBoolean(EclipseHandlerUtil.java:1425)
at lombok.eclipse.handlers.HandleGetter.createGetterForField(HandleGetter.java:193)
at lombok.eclipse.handlers.HandleGetter.createGetterForFields(HandleGetter.java:164)
at lombok.eclipse.handlers.HandleGetter.handle(HandleGetter.java:153)
at lombok.eclipse.HandlerLibrary$AnnotationHandlerContainer.handle(HandlerLibrary.java:106)
at lombok.eclipse.HandlerLibrary.handleAnnotation(HandlerLibrary.java:237)
at lombok.eclipse.TransformEclipseAST$AnnotationVisitor.visitAnnotationOnField(TransformEclipseAST.java:245)
at lombok.eclipse.EclipseNode.traverse(EclipseNode.java:110)

Expected behavior
Javac handler works well in this case and generate method:

public static EnumTest getAAA() {
    return AAA;
}

Version info:
Platform Eclipse:

• Version: 2023-03 (4.27.0)
• Build id: 20230309-1520
• Lombok v1.18.26 "Envious Ferret" is installed

[ZeYuYang1024]

you might have to create the getter methods manually for each enum constant.

[Rawi01]

Obviously lombok should not fail with an NPE and it is not that difficult to fix this but I don't get why you need a getter for an enum constant. It might be better to also remove the javac support for this.

[vladtimofeev000]

@Rawi01 ,

I don't get why you need a getter for an enum constant

Me too. I just want to sync eclipse and javac behaviors. Prevent NPE and remove the 'javac' support - will be nice.