Hi David,
Thanks for ur replies, I just want to make a generic function which
will take an object of mapper and returns the json string of the same.
I have written only two function
1. This will be called by ajax call :
def getJSONString(xhtml: Group):NodeSeq = {
getJSONStringGeneric(TestGearLogin) // here 'TestGearLogin' is
a mapper object
}
2. function to make JSON string i.e
def getJSONStringGeneric(anyObject :Any):NodeSeq = {
var sJSONString = "{\"bindings\": [";
anyObject match {
case mm: MetaMapper[_] => // this line is giving error
mm.findAll.map(userdetails => {
var tempJSON = "";
val ret = new StringBuilder
ret.append("{")
ret.append(userdetails.getSingleton.appendFieldToStrings
(userdetails))
ret.append("}")
tempJSON = ret.toString();
// some manipulation for making correct JSON
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);
}
I changed the code as you suggested but getting the error as I posted.
Please advise.
Thanks
Amit Kumar Verma
On Apr 10, 9:46 pm, David Pollak <feeder.of.the.be...@gmail.com>
wrote:
> 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 frameworkhttp://liftweb.net
> Beginning Scalahttp://www.apress.com/book/view/1430219890
> Follow me:http://twitter.com/dpp
> Git some:http://github.com/dpp
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Lift" group.
To post to this group, send email to liftweb@googlegroups.com
To unsubscribe from this group, send email to
liftweb+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/liftweb?hl=en
-~----------~----~----~----~------~----~------~--~---
