On 22/04/2013 10:44, Henry wrote:
I got these code:
///****************************/////////////
ListHandler<List<String>> columnSortHandler = new
ListHandler<List<String>>(
list);
columnSortHandler.setComparator(nameColumn,
new Comparator<List<String>>() {
public int compare(List<String> o1, List<String> o2) {
if (o1 == o2) {
return 0;
}
// Compare the name columns.
if (o1 != null) {
return (o2 != null) ? o1.get(0).compareTo(o2.get(0))
: 1;
}
return -1;
}
});
table.addColumnSortHandler(columnSortHandler);
///****************************/////////////
[...]
Is there anything wrong with the code above?
public int compare(List<String> o1, List<String> o2) {
return o1.get(0).compareTo(o2.get(0));
}
But in this case, the default comparator provided by GWT will do the same job.
I did that for a numerical comparison of values with units, for example:
@Override
public int compare(List<String> o1, List<String> o2)
{
String v1 = o1.get(columnIndex);
String v2 = o2.get(columnIndex);
double d1 = DataService.parseValue(v1);
double d2 = DataService.parseValue(v2);
if (d1 == 0 && d2 == 0)
return v1.compareTo(v2); // String comparison
return Double.compare(d1, d2);
}
The DataService.parseValue() parses the double at the start of the string, stopping on the
unit symbol.
The columnIndex is a member of my Comparator, since we do the same sorting for
all columns.
--
Philippe Lhoste
-- (near) Paris -- France
-- http://Phi.Lho.free.fr
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