CODEWITHSUNDEEP
javabuilderlombok
Andy897
Andy897

Reputation: 7133

overriding default values when using lombok builder

I am using lombok's builder. To assign the default value to some variables I am trying to use

@Builder.Default

But the problem is that on using the above annotation, I am no longer able to initialize that value through builder as compiler says can not resolve method while trying to initialize the variable through builder.

So, essentially what I am looking for is a way to set default values and still be able to override when initiating through builder.

Upvotes: 4

Views: 3369

Answers (1)

Thomas
Thomas

Reputation: 1143

My team has been struggling with this annotation failing to work in certain IDE's. Our workaround is to define a constructor with the @Builder annotation that sets the defaults if no value was given. For example:

public class ExampleClass {

    private final OtherClass otherClassField;

    @Builder
    public ExampleClass(OtherClass otherClass) {
        // if otherClass is null, use a default value
        otherClassField = otherClass != null ? otherClass : new OtherClass();
    }
}

As a note, if your class has primitive type fields, you'll need to use the primitive-wrapper types for the constructor arguments to be able to continue to use a null value to indicate falling back to the default.

You can also change the constructor access level to private to allow instances of this class to only be created using a builder.

Upvotes: 4

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