I think the .asJs method on all Mapper instances should give you the object
in JavaScript representation.
If you can post an entire file, I can work on helping you if the above
doesn't work.
On Thu, Apr 9, 2009 at 6:53 AM, Amit Kumar Verma <cdac.a...@gmail.com>wrote:
>
> copied the the same code but getting this error
>
> type arguments [_] do not conform to trait MetaMapper's type parameter
> bounds [A <: net.liftweb.mapper.Mapper[A]]
> TravelMerchantTest/src/main/
> scala/com/vtech/travelmerchant/snippet default.scala line 142
> 1239284830763 85593
>
> Actually I am trying to make the JSON object using a mapper object. My
> function is this :
>
> def getJSONStringGeneric(anyObject :Any):NodeSeq = {
>
> //Console.println("anyObject.getClass ::::::::
> "+anyObject.getClass);
>
> //Console.println("anyObject.getClass.getName ::::::::
> "+anyObject.getClass.getName);
>
> //var objTemp = anyObject.asInstanceOf[MetaMapper
> [TestGearLogin]];
>
> var sJSONString = "{\"bindings\": [";
>
> anyObject match {
> case mm: MetaMapper[_] =>
> mm.findAll.map(
> (userdetails: Mapper[_]) =>{
>
>
> var tempJSON = "";
>
> val ret = new StringBuilder
>
> ret.append("{")
>
> ret.append(userdetails.getSingleton.appendFieldToStrings
> (userdetails))
>
> ret.append("}")
>
> // ret will be like
> {username=222,password=222,audit_dt=2009-04-06
> 00:00:00.0,login_pid=26}
>
> tempJSON = ret.toString();
>
> tempJSON = tempJSON.replaceAll("\\{","\\{\"");
> tempJSON = tempJSON.replaceAll("\\}","\"\\}");
> tempJSON = tempJSON.replaceAll("=","\":\"");
> tempJSON = tempJSON.replaceAll("," , "\",\"");
> tempJSON += ",";
>
> sJSONString +=tempJSON
> }
> )
> }
>
> sJSONString = sJSONString.substring(0,sJSONString.length-1); //
> for slicing the last comma
> sJSONString += "]}";
>
> Text(sJSONString);
> }
>
>
> but not getting a way of doing this. Please advise.
>
> Thanks
> Amit Kumar Verma
>
>
> On Apr 9, 6:14 pm, David Pollak <feeder.of.the.be...@gmail.com> wrote:
> > Howdy,
> > Scala is a static language, so the class for casting must be known at
> > compile time. It's not possible to construct a String at runtime and
> cast
> > an object into a class represented by that String.
> >
> > However, casting to a known class is easy in Scala... and it's done
> > primarily using pattern matching. The following code:
> >
> > def foo(in: Any) = in match {
> > case mm: MetaMapper[_] =>
> > mm.findAll.map(
> > (m: Mapper[_]) =>
> > m.asJs
> > )
> > case _ =>
> > }
> >
> > Does what I think you want. It takes an incoming instance, in and
> matches
> > it against being an instance of MetaMapper[_]. This means its some type
> of
> > MetaMapper (we don't know or care what the type parameter is). If it is
> a
> > MetaMapper, it's assigned to the mm variable. We can then call findAll
> on
> > that variable and we have a bunch of Mapper[_] instances. Note that I
> > explicitly called out the type of m in the function, but that line could
> be
> > re-written mm.findAll.map(m => m.asJs) because the compiler infers the
> type
> > of m.
> >
> > Does this help?
> >
> > Thanks,
> >
> > David
> >
> > On Thu, Apr 9, 2009 at 3:55 AM, Amit Kumar Verma <cdac.a...@gmail.com
> >wrote:
> >
> >
> >
> >
> >
> > > Hi All,
> >
> > > I am trying to type cast an scala object to its mapper object
> >
> > > 1 def getJSONString(anyObject :Object):NodeSeq = {
> >
> > > 2 var obj = anyObject.asInstanceOf[anyObject.getClass
> > > ().getName()];
> >
> > > 3 obj.findAll.map(userdetails => {
> > > // some code will go here
> > > }
> > > Text("any string")
> > > }
> >
> > > but i am getting erroe as "expected [ but found (" on line 2.
> >
> > > please help me to typecast the object to its mapper object.
> >
> > > Thanks
> > > Amit Kumar Verma
> >
> > --
> > Lift, the simply functional web frameworkhttp://liftweb.net
> > Beginning Scalahttp://www.apress.com/book/view/1430219890
> > Follow me:http://twitter.com/dpp
> > Git some:http://github.com/dpp
>
> >
>
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
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