CODEWITHSUNDEEP
javajsonplayframework
Govind Singh
Govind Singh

Reputation: 15490

trim all String values in JsonNode

i need to trim all the String values

{   
   "startDate": "2015-06-29",
   "endDate": "2015-07-04",
    "category": "VIP ",
    "name": " govind",
    age: 10,
    "place": " goa "
}

i am doing it by

JsonNode json = request().body().asJson();
CLassName cl = Json.fromJson(json , ClassName.class);

and trimming in setter of ClassName

suggest any other good approach because i know its not a good approach

Upvotes: 2

Views: 4368

Answers (3)

bjfletcher
bjfletcher

Reputation: 11518

If you can confirm that the JSON will not have quotes within values then for better performance I'd do the trimming on the raw text rather than the parsed version:

val text = request.body.asText
// RegEx explanation:
// space followed by asterisk means any number of spaces
// backward slash escapes the following character 
val trimmed = text.map(_.replaceAll(" *\" *", "\""))
import play.api.libs.json.Json
val json = Json.parse(trimmed)

Java version:

import play.api.libs.json.*;

String text = request().body().asText();
String trimmed = text.replaceAll(" *\" *", "\"");
JsValue json = Json.parse(trimmed);

Upvotes: 3

user4910279
user4910279

Reputation:

Try this:

public static void main(String[] args) {
    String json =
          "{"
        + "   \"startDate\": \"2015-06-29\","
        + "   \"endDate\": \"2015-07-04\","
        + "   \"category\": \"VIP \","
        + "   \"name\": \" govind\","
        + "   age: 10,"
        + "   \"place\": \" goa \""
        + "}";
    Type stringStringMap = new TypeToken<Map<String, String>>(){}.getType();
    Map<String, String> map = new Gson().fromJson(json, stringStringMap);
    Map<String, String> trimed = map.entrySet().stream()
        .map(e -> new AbstractMap.SimpleEntry<>(e.getKey().trim(), e.getValue().trim()))
        .collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()));
    System.out.println(trimed);
    // -> {endDate=2015-07-04, name=govind, place=goa, category=VIP, age=10, startDate=2015-06-29}
}

Upvotes: 0

nirajkumar
nirajkumar

Reputation: 330

but changing the setter is not the right way to do it. As you would not be able to create the complete object again(even if it is required). Either you write a seperate Trimmer class which take this object and trim it. or some function in the same class. I would prefer a trimmer class

Upvotes: 0

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