Extract Values from JSON Response in Scala

Question

How could I extract values from the following response:

 {"photosets":{"cancreate":1, "page":1, "pages":1, "perpage":1, "total":1, "photoset":
[{"id":"72157629171255321", "primary":"6817523143", "secret":"250f42ed7c", "server":"7166", 
"farm":8, "photos":"1", "videos":0, "title":{"_content":"Set1"}, "description":{"_content":""}, 
"needs_interstitial":0, "visibility_can_see_set":1, "count_views":"0", "count_comments":"0", 
"can_comment":1, "date_create":"1328373127", "date_update":"1328373159"}]}, "stat":"ok"}

I need some values not All of them for example I need "id" field How can I get it?

Thanks,

Any solution Using lift-json, dispatch or sjson.

Feras Odeh
– Feras Odeh

2012-02-11 04:36:18 +00:00
Commented Feb 11, 2012 at 4:36 — Feras Odeh
– Feras Odeh, Commented Feb 11, 2012 at 4:36

Andy Petrella · Accepted Answer · 2012-02-10 21:22:14Z

There is a very performant wrapper (because Jackson is...) for scala. Jerkson will help you in doing this check this out.

val ids: Seq[JString] = parse[JValue]("""
  {"photosets":{"cancreate":1, "page":1, "pages":1, "perpage":1, "total":1, "photoset":
  [{"id":"72157629171255321", "primary":"6817523143", "secret":"250f42ed7c", "server":"7166", "farm":8, "photos":"1", "videos":0, "title":{"_content":"Set1"}, "description": {"_content":""}, "needs_interstitial":0, "visibility_can_see_set":1, "count_views":"0", "count_comments":"0", "can_comment":1, "date_create":"1328373127", "date_update":"1328373159"}]}, "stat":"ok"}
""") \\ "id"

Here is a HowTo, note the use of parse that will return a JValue, on which you can call \ or \\ that find on the first level or any the property given rigth after.

Using reflection, Jerkson is also available to parse directly in case class, check the documentation... it's very powerful

Maurício Linhares · Accepted Answer · 2012-02-10 19:09:54Z

0

There isn't anything inherently Scala about this, just use a JSON parser like Jackson and extract the information that you need.

answered Feb 10, 2012 at 19:09

Maurício Linhares

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Feras Odeh Over a year ago

It is not important to be part of Scala.

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