Java: Json to DataTable object

[Edwin van de Koppel]

Hello all,

I am using the google-visualization-java in my Java AppEngine/GWT
project (Eclipse).

From the client side I am doing a HTTP get to the server side to
retrieve a com.google.visualization.datasource.DataTable object.
On that server side the DataTable object is being built up from the
app engine datastore OR memcache. In order to be able to store a
DataTable into memcache, it has to be serializable. Therefore, I
convert it to a JSON string:

String aJsonString = JsonRenderer.renderDataTable(myDataTable, true,
true).toString();

(JsonRenderer is part of the google-visualization-java package)
Yet, I cannot figure out how to turn a JSON string back into a
DataTable object.

I have tried the following:

public static native DataTable toDataTable(String theJsonString) /*-{
return new DataTable(eval("("+theJsonString+")"));
}-*/;
DataTable myDataTable = toDataTable(aJsonString);

but then I am getting a java.lang.UnsatisfiedLinkError.

So what am I doing wrong? Or is there another way?

[MC Get Vizzy]

I'm not sure I understand.  You need to deserialize the DataTable on the client or the server?

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[Edwin van de Koppel]

Still on the server side.

[MC Get Vizzy]

Sorry, we don't currently have any support for that.  (By the way, I think your code is failing because you can't use GWT native code on the server side.)

[Edwin van de Koppel]

Ok, so as I understand there is a way to turn a DataTable into a JSON
string, but not visa versa?
Will the JSON -> DataTable functionality become available anytime
soon?