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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