Re: A Java Question... not working.

[Wei He]

I think the last resort is to find out what the objects really are. This can be done by using getClass().getName() on each Object in your Collection. This can be done in vm file, and class name of each Object will be printed.

Once you find out what they are and call their own methods to get the fields you need. Hope this helps.

Eigen Technology Pty Ltd wrote:

Thanks to all,

I have tried all that suggested, unfortunately none worked ... What Wei
has suggested compiles OK, but nothing got returned. Here is my procedure
again:

1. Extract data from DB using a PullTool
2. Data is encapsulated in a Vector.
3. Each element in this Vector contains a single row of data (multiple col).
4. Try to extract a single col of datum from a single row.

The first time when I perform the elementAt(1), it is OK, it returns a
list of Objects. I can get Velocity to display its contents by

$documents.XXX

If I perform toString() on these objects, I get only the Address of the
objects. If I perform another elementAt(x), nothing got returned. I am a
bit confused here, how is object-strings converted in general?

thanks
michael

Your right hand side is an Object, you need to do a cast.  That is:

String test = (String)((Object)docs.elementAt(1)).elementAt(1);

or

String test = ((Doc)docs.get(1)).getDocString();

or

String test = (docs.elementAt(1)).elementAt(1).toString();

It depends on the type you have for the first field in your doc object.
 If it is a BigDecimal, direct cast may not work, toString() will do.
You see my point.

Hope this helps.

Eigen Technology Pty Ltd wrote:

I could possibly write a servlet to extract and then filter the data,
but I think that would defeat the purpose of having Turbine in the
first place.

I tried:

String test = ((Object)docs.elementAt(1)).elementAt(1);
return test;

the compiler did not complain, but Velocity rejected it. Really
running out of ideas. Any suggestion would be appreciated.

cheers
michael

I have a db Table consisting of 10 (say col_A, col_B, col_C, col_D,
... col_J) columns.  After accessing these data using a PullTool (as
suggested by Scott and Peter), I stored them in a Vector/List. Before
I display them in my .vm file, I want to perform some filtering, e.g.
select col_A = "some_Text".

The question is:

I can extract what is in the Vector as Objects which has all ten
columns in it, it returns a certain address. But How do I get data in
col_A out and perform the filtering I intended to do?

best wishes
michael



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