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javajavers

Javers compare String null and "" empty String

Is it possible to configure Javers so that when comparing two objects which have a String property that has the value null or "" (empty) String it will not find any difference. Basically treat null and "" empty string the same. For example:

Class Phone 
{
    String phoneNumber;
    Phone(phoneNumber)
    {
         this.phoneNumber = phoneNumber;
    }

}
Phone phoneNumber = new PhoneNumber("");
Phone phoneNumber1 = new PhoneNumber(null);

I would like that when these 2 objects will be compared by Javers, it will show no difference.

Solution

  • You can register a custom comparator for Values. It's explained in JaVers doc - https://javers.org/documentation/domain-configuration/#ValueType

    Javers javers = JaversBuilder.javers()
        .registerValue(String.class, (a, b) ->  StringUtils.equals(a,b)).build();