The GridDataSource has control over sorting. If you provide an
instance of GridDataSource as the source parameter, rather than a
List, you'll have the control you need.
On Wed, Jul 30, 2008 at 11:38 AM, Moritz Gmelin <[EMAIL PROTECTED]> wrote:
> OK,
>
> but then I would have to dramatically change all models I use for grids. To
> use some transient properties of the data returning CaseInsensitiveStrings
> for the actual property I wanted to display.
> I was rather hoping for some very T5-like-elegant way to either replace the
> default Comparator for certain object types. Just as I can replace the
> renderer of certain types by providing a new renderer.
>
> Any other ideas?
>
> M.
>
>
> Am 30.07.2008 um 16:30 schrieb Daniel Jue:
>
>> Here is one way to do it:
>>
>> For the object associated with the column you want to sort, you
>> override the comparable method. I am not sure if there is an existing
>> JDK Object for "case-insensitive String", but you could create one.
>> Overriding comparable is how you do the custom sorting. There are
>> probably other ways of doing this.
>>
>> Stolen from the web:
>> public final class CaseInsensitiveString implements Comparable {
>> private String s;
>>
>> public CaseInsensitiveString(String s) {
>> if (s == null)
>> throw new NullPointerException();
>> this.s = s;
>> }
>>
>> public boolean equals(Object o) {
>> return o instanceof CaseInsensitiveString &&
>> ((CaseInsensitiveString)o).s.equalsIgnoreCase(s);
>> }
>>
>> // Lazily initialized, cached hashCode - page 40
>> private volatile int hashCode = 0; // (See Item 48)
>>
>> public int hashCode() {
>> if (hashCode == 0)
>> hashCode = s.toUpperCase().hashCode();
>>
>> return hashCode;
>> }
>>
>> public int compareTo(Object o) {
>> CaseInsensitiveString cis = (CaseInsensitiveString)o;
>> return String.CASE_INSENSITIVE_ORDER.compare(s, cis.s);
>> }
>>
>> public String toString() {
>> return s;
>> }
>> }
>>
>> On Wed, Jul 30, 2008 at 6:15 AM, Moritz Gmelin <[EMAIL PROTECTED]>
>> wrote:
>>>
>>> Hi,
>>>
>>> If I wanted to change the sorting system of a grid colum. e.g ignore
>>> lower/uppercase for sorting.
>>> How could I do this?
>>>
>>> Regards
>>>
>>> Moritz
>>>
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>>
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>
>
--
Howard M. Lewis Ship
Creator Apache Tapestry and Apache HiveMind
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