get property from set lombok value - collections

Question

Hi I have been trying to figure out how to get stateCode from a Places object by using stream. I am using lombok to parse the json object which looks like this:
{"post code": "90210", "country": "United States", "country abbreviation": "US", "places": [{"place name": "Beverly Hills", "longitude": "-118.4065", "state": "California", "state abbreviation": "CA", "latitude": "34.0901"}]}
I've constructed a class to process the object like so:
#lombok.Value
public class ZipCode {
#JsonAlias("post code")
private final String postalCode;
private final Set<Places> places;
public ZipCode() {
this.postalCode = null;
this.places = null;
}
public ZipCode(String postalCode, Set<Places> places) {
this.postalCode = postalCode;
this.places = places;
}
#lombok.Value
private static class Places {
#JsonAlias("state abbreviation")
private final String stateCode;
}
}
I thought that if I used
ZipCode zip = getZipObject();
String stateCode = zip.getPlaces().stream().findFirst().toString();
I would be able to get the stateCode as a string. In my example the stateCode should've been "CA". Instead I get Optional[ZipCode.Places(stateCode=NY)]. If anyone could help me with this I would appreciate it. I am keeping the ZipCode class in a separate class. I would like to keep it that way. Most of the examples that I've. seen with using stream tend to use the set object itself. I want to avoid having to make my Places object publicly accessible.

Answer 1

I was able to get the stateCode property by modifying the ZipCode class like so
#lombok.Value
public class ZipCode {
#JsonAlias("post code")
private final String postalCode;
private final Set<Places> places;
#lombok.Value
public static class Places {
#JsonAlias("state abbreviation")
private final String stateCode;
}
}
Then I used stream like so
if(zip.getPlaces().stream().findFirst().isPresent())
String state = zip.getPlaces().stream().findFirst().get().getStateCode();
This produce an output of "CA" for the example json. Hope this helps someone.