RE: [Jython-users] Understanding the Limitations of Abstract Classes

[Oti <oh...@ya...>]

Hello Kimberly,

Just FYI: I even tried to 'non-implement' AbstractTableModel like this:

from javax.swing.table import AbstractTableModel
class cMyTableData(AbstractTableModel):
    def __init__(self):
        pass
    def sortMyData(self, thing):        
        print thing
if __name__ == "__main__":
    td = cMyTableData()
    td.sortMyData( "thingee" )

and the interpreter did not complain as long as I did not call a method
of AbstractTableModel.

Best wishes,
Oti.

--- "Davis, Kimberly A" <kim...@in...> wrote:
> Yes, Bent, you are correct in your assessment below. I can only give
> you
> the information that I have given Jeff Emmanuel, another participant
> in
> the Jython users group. To summarize quickly:
>  
> I do remember jython did not complain about the setting of the model.
> It
> complained about the class definition itself. When I invoked the
> interpreter, I got a message (I am paraphrasing obviously) that was
> something like: Error- AbstractTableModel is an abstract class.
> Cannot
> add sortMyData method to an abstract class. I am using Jython 2.1
> with
> the Komode IDE 2.0 professional.
>  
> I supply the class described in my first posting as a model to a
> simple
> swing JTable. I set the model this way:
> self.tblSearchOutput.setModel(self.searchTableModel)
>  
> The JTable is on a JFrame with several other GUI components. 
>  
> I was able to get around the problem I described by creating another
> class, which has the extra sorting methods that I need, and allowing
> my
> model class to inherit from both these classes:
>  
> class cMyTableData(swing.table.AbstractTableModel,
> cSearchTableSorter):
>  
> Admittedly, sloppy. However, as is often the case, the show must go
> on,
> and I could not seem to reason through this problem. No matter what I
> did, Jython complained about my adding the sortMyData method to a
> class
> inheriting from the AbstractTableModel, and I had to do something to
> fix
> the problem.
>  
> There has been some lag time between when I had posted this problem
> to
> the jython user group and when I received any interest in the form of
> responses. I can't reproduce the error exactly because my code base
> has
> moved on substantially. I wish I had had the foresight to freeze and
> label that particular point in the project in case somebody
> responded. 
>  
> It's just weird to me that I haven't had this problem with other
> abstract classes.
>  
> KD
>  
> -----Original Message-----
> From: Bent Andre Solheim [mailto:be...@be...] 
> Sent: Wednesday, September 10, 2003 3:00 PM
> To: Davis, Kimberly A
> Cc: jyt...@li...
> Subject: RE: [Jython-users] Understanding the Limitations of Abstract
> Classes
>  
> Hi Kimberly,
>  
> I'm not sure if I have understood your problem, so please correct me
> if
> I
> am wrong;
> You are subclassing a Java class i Jython and wish to use this class
> together with some other javax.swing class? It looks to me as if you
> are
> working with your object through a limited interface, for instance
> through
> javax.swing.table.TableModel which AbstractTableModel implements, or
> through the public interface of AbstractTableModel itself. Which
> interface
> you are working with depends on how you created your object (or got a
> hold
> of it). I am unable to help you more without seeing more code...
> Hope this helps
>  
> regards
> Bent
>  
>  
>  
>  
> > Perhaps this problem has been covered already, but I haven't been
> able
> > to find the answer in documentation or user groups. I am using an
> > abstract class called AbstractTableModel. To create a concrete
> > TableModel as a sublcass of AbstractTableModel you need only
> provide
> > implementations for the following three methods (which I've done):
> >  public int getRowCount();
> >  public int getColumnCount();
> >  public Object getValueAt(int row, int column);
> >
> > Here is the jython class:
> >
> > class cMyTableData(swing.table.AbstractTableModel):
> >    #----------------------------------------------------------
> >    # __init__ Constructor
> >    # Initializes all member data.
> >    #
> >    #----------------------------------------------------------
> >    def __init__(self):
> >        self.path = cColumnData(COLUMN_1, 50, swing.JLabel.LEFT)
> >        self.lineno = cColumnData(COLUMN_2, 50, swing.JLabel.LEFT)
> >        self.columns = [ self.path,self.lineno]
> >        self.vector = java.util.Vector()
> >        self.vector.removeAllElements()
> >
> >    def getColumnCount(self):
> >           # code particular to my situation
> >
> >    def getRowCount(self):
> >        # code particular to my situation
> >
> >    def getValueAt(self, nRow, nCol):
> >       # code particular to my situation
> >
> >    #An additional function I've added...
> >    def sortMyData(self, thing):
> >        # blah, blah, blah...
> >
> > When I add sortData, to this class, I get an error: AttributeError:
> > sortMyData
> >
> > Why does this particular class restrict me? Does anyone know? I
> have
> > tried the same thing with AbstractList with success.
> >
> > Thanks in advance for any information,
> > KD
> >
>  
>  
>  
> Last ned dette som en fil
>
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