Re: java.lang.UnsupportedOperationException?? (Mind Bridge?)

[Fermin Da Costa Gomez <da...@gmail.com>]

Thx Paul,

Paul Ferraro wrote:
> Digging into this quickly, I think the problem is the underlying list 
> created by SimpleListTableDataModel uses Arrays.asList().
So was i.

> Unfortunately, java.util.List.remove(Object) is an optional operation, 
> and it is not implemented by the list returned by Arrays.asList() (that 
> makes sense since you cannot remove an arbitrary element of an array in 
Fair enough, i wasn't aware of that, so this would indeed explain it.

> this way).  It would seem that the constructor of 
> SimpleListTableDataModel should instead create a new list from the array 
> [e.g. ArrayList(Arrays.asList(arrRows))], so that the remove(...) 
> operation will succeed as intended.
I'm guessing the code was recently changed because this very method used to work.

> I'm no expert on the Table component, so I'd recommend you verify this 
> with Mind Bridge.
Quietly hoping he spots the thread

Fermin

> 
> F. Da Costa Gomez wrote:
> 
>> Hi,
>>
>> The following method is supposed to delete an object from a 
>> SimpleListTableDataModel. Nothing fancy one would say.
>> I checked the existence of o by calling getRows() in the debugger and 
>> visually confirming the existence of o in the model.
>>
>> private void deleteRow(IRequestCycle cycle, Object o) {
>>  // Remove the row from the current TableDataModel
>>  SimpleListTableDataModel dm = ((SimpleListTableDataModel) 
>> ((SimpleTableModel)   getTableModel()).getDataModel());
>>  dm.getRows(0, dm.getRowCount()-1);
>>  dm.removeRow(o);
>>  // Remove the row from the temporary map
>>  _objectLinkMap.remove(o.toString());
>> }
>>
>> Calling removeRow() with the object o however gives me the following:
>> java.lang.UnsupportedOperationException
>> Stack Trace:
>>
>>     * java.util.AbstractList.remove(AbstractList.java:171)
>>     * java.util.AbstractList$Itr.remove(AbstractList.java:436)
>>     * java.util.AbstractCollection.remove(AbstractCollection.java:255)
>>     * 
>> org.apache.tapestry.contrib.table.model.simple.SimpleListTableDataModel.removeRow(SimpleListTableDataModel.java:129) 
>>
>>     * org.dcg.jwc.tables.DynamicTable.deleteRow(DynamicTable.java:310)
>>
>> I even set a breakpoint *in* the datamodel class on the entrypoint 
>> into the removeRow() method. The object to be removed was indeed 
>> present in the variable m_arrRows that obviously contains the objects. 
>> I even went into the AbstractCollection where object is 'sought out' 
>> and deleted. (or rather isn't).
>>
>> I'v got no idea what i'm doing wrong here so any suggestion would be 
>> welcome.
>>
>> tia,
>>
>> Fermin DCG
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
>> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>>
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
> 
> 


---------------------------------------------------------------------
To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
For additional commands, e-mail: tapestry-user-help@jakarta.apache.org