if i look at this:
new DropDownChoice<ColumnInfo>
(form, "columnId",
columnMangerService.selectAllColumnInfo(), new ColumnRender());
then it seems to me that columnId is a id (integer)
So it doesn't hold a ColumnInfo object but the id of that object.
Then your choice renderer is wrong.
If this is the case then please let us see the stacktrace.
johan
On 1/8/07, tooy li(Gmail) <[EMAIL PROTECTED]> wrote:
I got a cast error , when i use customer IChoiceRender
class ColumnRender implements IChoiceRenderer<ColumnInfo> {
public Object getDisplayValue(ColumnInfo object) {
return object.getFormattedName();
}
public String getIdValue(ColumnInfo object, int index) {
return object.getId();
}
}
new DropDownChoice<ColumnInfo>(form, "columnId",
columnMangerService.selectAllColumnInfo(), new ColumnRender());
I can make sure it's the right type in the data list. and the dropdownlist
is show well,
but it make a cast error when i save. in the getIdValue method, render
only get a string object with the hashcode of ColumnInfo object. I think
the error is related generics.
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