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DataSet using Java Classes [message #147058]

Wed, 22 March 2006 11:06

Eclipse User

Hello all,

I am using BIRT 2.0,Eclipse 3.1 and Tomcat 5.5. My objective is to
retrieve data from Java classes(Vectors,Hashtables) and import them into
my Dataset.

For this I wrote Java classes,which generate data from the database and
return the data in the form of a Vector(made up of String arrays).

I used JavaScript(Rhino) for importing these packages and used the
methods. My code is :

open tab
-----------

importPackage(Packages.mypackage);

myclass = new Connection();
rowdata = myclass.readData();
totalrows = rowdata.size();
currentrow = 0;

fetch tab
----------

if(currentrow >= totalrows)
{ return(false);}

var favrow = rowdata.get(currentrow);
var Customer = favrow[0];
var Favorite = favrow[1];
var Color = favrow[2];

row["Customer"] = Customer;
row["Favorite"] = Favorite;
row["Color"] = Color;
currentrow = currentrow+1;
return (true);

close tab
----------
rowdata = null;
tmsreportclass = null;

The DataSet shows the values in the preview results but the values dont
show in the preview tab.Could someone guide me if they had this error
before

best wishes

Re: DataSet using Java Classes [message #147960 is a reply to message #147058]

Fri, 24 March 2006 14:29

Eclipse User

Ravi,

Maybe this will help. I have a simple project that uses the
java.lang.System object to get the properties of the system and to
display them a report.

Scott Rosenbaum
BIRT PMC

Ravi wrote:
>
> Hello all,
>
> I am using BIRT 2.0,Eclipse 3.1 and Tomcat 5.5. My objective is to
> retrieve data from Java classes(Vectors,Hashtables) and import them into
> my Dataset.
>
> For this I wrote Java classes,which generate data from the database and
> return the data in the form of a Vector(made up of String arrays).
>
> I used JavaScript(Rhino) for importing these packages and used the
> methods. My code is :
>
> open tab
> -----------
>
> importPackage(Packages.mypackage);
>
> myclass = new Connection();
> rowdata = myclass.readData();
> totalrows = rowdata.size();
> currentrow = 0;
>
> fetch tab
> ----------
>
> if(currentrow >= totalrows)
> { return(false);}
>
> var favrow = rowdata.get(currentrow);
> var Customer = favrow[0];
> var Favorite = favrow[1];
> var Color = favrow[2];
>
> row["Customer"] = Customer; row["Favorite"] = Favorite; row["Color"] =
> Color; currentrow = currentrow+1;
> return (true);
>
>
> close tab
> ----------
> rowdata = null;
> tmsreportclass = null;
>
>
> The DataSet shows the values in the preview results but the values dont
> show in the preview tab.Could someone guide me if they had this error
> before
>
> best wishes
>

Re: DataSet using Java Classes [message #148681 is a reply to message #147058]

Mon, 27 March 2006 15:58

Eclipse User

hi. there is an example in the BIRT examples about how to retrieve
information from a scripted data base (java). take a look 'cause it
answers your question.

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