Complicated type error with org.json.simple.JSONObject:put

Did you get an answer?
I don't think I'd use that.  I tried using a scala.map; JSONValue.toJSONString(Map(...)) and it didn't like it.  
Have you tried
  http://github.com/dpp/liftweb/tree/master/lift-base/lift-json/   http://github.com/jjmmcc/scala0.json/
2009/12/9 Sébastien Pierre <sebastien.pierre@gmail.com>

Hello there !
I am a Scala newbie with a background in Java and Python, and am getting the following errors while using the org.json.simple library from within Scala:

scala> val o = new org.json.simple.JSONObject()  o: org.json.simple.JSONObject = {}
scala> o.put("a",1) <console>:6: error: overloaded method value put with alternatives (K,V)V <and> ((K with K,_2)_2) forSome { type _2 >: V with V } cannot be applied to (java.lang.String,Int)        o.put("a",1)         ^

Can anybody shed some light on this ?
 -- Sébastien
PS: To try this example, simply get this jar http://json-simple.googlecode.com/files/json_simple-1.1.jar and add it to your $CLASSPATH, then run it in scala.

Hi Mohamed,
It looks like I'm going to try a Scala JSON library, but I'm a bit concerned about encountering such cryptic type errors by simply using a well-known Java library. Do you have any idea what the type error means ?
overloaded method value put with alternatives (K,V)V <and> ((K with K,_2)_2) forSome { type _2 >: V with V } cannot be applied to (java.lang.String,Int)
 -- Sébastien

Le 12 décembre 2009 16:41, Mohamed Bana <mohamed@bana.org.uk> a écrit :

Did you get an answer?
I don't think I'd use that.  I tried using a scala.map; JSONValue.toJSONString(Map(...)) and it didn't like it.  
Have you tried
  http://github.com/dpp/liftweb/tree/master/lift-base/lift-json/   http://github.com/jjmmcc/scala0.json/
2009/12/9 Sébastien Pierre <sebastien.pierre@gmail.com>

Hello there !
I am a Scala newbie with a background in Java and Python, and am getting the following errors while using the org.json.simple library from within Scala:

scala> val o = new org.json.simple.JSONObject()  o: org.json.simple.JSONObject = {}
scala> o.put("a",1) <console>:6: error: overloaded method value put with alternatives (K,V)V <and> ((K with K,_2)_2) forSome { type _2 >: V with V } cannot be applied to (java.lang.String,Int)        o.put("a",1)         ^

Can anybody shed some light on this ?
 -- Sébastien
PS: To try this example, simply get this jar http://json-simple.googlecode.com/files/json_simple-1.1.jar and add it to your $CLASSPATH, then run it in scala.

Taking a peak at the source code
(http://code.google.com/p/json-simple/source/browse/trunk/src/org/json/si...),
it looks like the author decided to use raw types when inheriting from
HashMap, instead of . I'm not really in a place to test
out the hypothesis, but I bet that that's the problem.

It's still present in 2.8.0.Beta1-RC2, so it might be worth filing a
bug over. Alternatively, you could ask the simple json people to
change it to (or ). That kind of
implementation inheritance is really ugly anyway.

On Mon, Dec 14, 2009 at 05:56:03PM -0500, Sébastien Pierre wrote:
> It looks like I'm going to try a Scala JSON library, but I'm a bit
> concerned about encountering such cryptic type errors by simply using
> a well-known Java library. Do you have any idea what the type error
> means ?

It means the library is all written with raw types, and as if that
weren't enough, JSONObject extends HashMap raw:

public class JSONObject extends HashMap implements Map, JSONAware, JSONStreamAware

I don't even know how to work around that without modifying the source.
If you recompile it like this and build with source/target 1.5 it works.

public class JSONObject extends HashMap implements Map, JSONAware, JSONStreamAware{

Or use codehaus jettison JSON implementation, it works fine with Scala.

Regards CS

Am 15.12.09 00:28 schrieb "Paul Phillips" unter :

> On Mon, Dec 14, 2009 at 05:56:03PM -0500, Sébastien Pierre wrote:
>> It looks like I'm going to try a Scala JSON library, but I'm a bit
>> concerned about encountering such cryptic type errors by simply using
>> a well-known Java library. Do you have any idea what the type error
>> means ?
>
> It means the library is all written with raw types, and as if that
> weren't enough, JSONObject extends HashMap raw:
>
> public class JSONObject extends HashMap implements Map, JSONAware,
> JSONStreamAware
>
> I don't even know how to work around that without modifying the source.
> If you recompile it like this and build with source/target 1.5 it works.
>
> public class JSONObject extends HashMap implements Map Object>, JSONAware, JSONStreamAware{

Thanks everyone for the answer,
I've filed a bug to json-simple, and will be filing a bug to scala as soon as the registration is processed.
 -- Sébastien

I'll file a bug to Scala and 

Le 15 décembre 2009 05:29, Christopher Schmidt <Christopher.Schmidt@eads.com> a écrit :

Or use codehaus jettison JSON implementation, it works fine with Scala.

Regards CS


Am 15.12.09 00:28 schrieb "Paul Phillips" unter <paulp@improving.org>:

> On Mon, Dec 14, 2009 at 05:56:03PM -0500, Sébastien Pierre wrote:
>> It looks like I'm going to try a Scala JSON library, but I'm a bit
>> concerned about encountering such cryptic type errors by simply using
>> a well-known Java library. Do you have any idea what the type error
>> means ?
>
> It means the library is all written with raw types, and as if that
> weren't enough, JSONObject extends HashMap raw:
>
> public class JSONObject extends HashMap implements Map, JSONAware,
> JSONStreamAware
>
> I don't even know how to work around that without modifying the source.
> If you recompile it like this and build with source/target 1.5 it works.
>
> public class JSONObject extends HashMap<Object, Object> implements Map<Object,
> Object>, JSONAware, JSONStreamAware{

And, apopros of using jettison, you can use scala.xml.XML.load(org.xml.sax.InputSource) to convert a SAX-encoded doc to a scala.xml.Elem.

Anyone know of a easy way to convert StAX-encoded to scala Elem?

Best regards,
Brian Maso
(949) 395-8551
brian@blumenfeld-maso.com
twitter: @bmaso
skype: brian.maso
LinkedIn: http://www.linkedin.com/in/brianmaso

2009/12/15 Christopher Schmidt <Christopher.Schmidt@eads.com>

Or use codehaus jettison JSON implementation, it works fine with Scala.

Regards CS


Am 15.12.09 00:28 schrieb "Paul Phillips" unter <paulp@improving.org>:

> On Mon, Dec 14, 2009 at 05:56:03PM -0500, Sébastien Pierre wrote:
>> It looks like I'm going to try a Scala JSON library, but I'm a bit
>> concerned about encountering such cryptic type errors by simply using
>> a well-known Java library. Do you have any idea what the type error
>> means ?
>
> It means the library is all written with raw types, and as if that
> weren't enough, JSONObject extends HashMap raw:
>
> public class JSONObject extends HashMap implements Map, JSONAware,
> JSONStreamAware
>
> I don't even know how to work around that without modifying the source.
> If you recompile it like this and build with source/target 1.5 it works.
>
> public class JSONObject extends HashMap<Object, Object> implements Map<Object,
> Object>, JSONAware, JSONStreamAware{