[Feature] Generate hashcode & equals methods for model classes #94

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1. hauner commented on Apr 25, 2022

   

   hauner

   on Apr 25, 2022

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   Not sure I want to generate equals() & hasCode(). Depends on the number of cases it needs to handle. If the array is the only special case it looks manageable. :)

   having Objects only:

   public boolean equals (Object o) {
       if (this == o)
           return true;
   
       if (o == null || getClass () != o.getClass ())
           return false;
   
       Reference reference = (Reference) o;
       return Objects.equals (ref, reference.ref)
           && Objects.equals (value, reference.value);
   }
   
   public int hashCode () {
       return Objects.hash (ref, value);
   }

   having an array:

   public boolean equals (Object o) {
       if (this == o)
           return true;
   
       if (o == null || getClass () != o.getClass ())
           return false;
   
       Book book = (Book) o;
       return Objects.equals (id, book.id)
           && Objects.equals (title, book.title)
           && Arrays.equals (authors, book.authors);
   }
   
   public int hashCode () {
       int result = Objects.hash (id, title);
       result = 31 * result + Arrays.hashCode (authors);
       return result;
   }