Re: Column sorting using async dataprovider in celltable
AFAIK, AsyncDataProvider is designed for requesting a small page of
data to be displayed from a potentially large dataset via RPC. In this
scenario you would usually want to pass the sort order(along with the
range) to the RPC service, so it can sort on the whole dataset, rather
than just the current page.
On Thu, Sep 29, 2011 at 2:23 PM, jgm wrote:
> Forgot to mention that an example of both ListDataProvider and
> AsyncDataProvider can be found here:
> -
> http://code.google.com/intl/da/webtoolkit/doc/latest/DevGuideUiCellTable.html
>
> We think that the sorting inside the AsyncDataProvider breaks the idea
> of separation of view and data.
>
> Or have we totally misunderstood when to use AsyncDataProvider vs
> ListDataProvider? Or how sorting is implemented.
>
> On 27 Sep., 16:41, jgm wrote:
>> Hello,
>>
>> We are using an async dataprovider in our celltable, and we have had
>> some problemt gettting the sorting to work.
>>
>> In the OnRangeChanged method, we implement sorting this way:
>>
>> if (sortList.get(0).getColumn().equals(costManagementNameColumn)) {
>> Collections.sort(effectConfigurationCache, new
>> Comparator() {
>> public int compare(EffectConfiguration o1,
>> EffectConfiguration o2) {
>> if (o1 == o2) {
>> return 0;
>> }
>> // Compare the cost management name columns.
>> int diff = -1;
>> if (o1 != null) {
>> diff = (o2 != null) ?
>> o1.getCostManagementName().compareTo(o2.getCostManagementName()) : 1;
>> }
>> return sortList.get(0).isAscending() ? diff : -diff;
>> }
>> });} else if (sortList.get(0).getColumn().equals(orgUnitNameColumn))
>> {
>>
>> Collections.sort(effectConfigurationCache, new
>> Comparator() {
>> public int compare(EffectConfiguration o1,
>> EffectConfiguration o2) {
>> .
>> .
>> }
>> });} else if
>> (sortList.get(0).getColumn().equals(effectTypeNameColumn)) {
>>
>> Collections.sort(effectConfigurationCache, new
>> Comparator() {
>> public int compare(EffectConfiguration o1,
>> EffectConfiguration o2) {
>> ..
>> .
>> }
>> });} else if
>> (sortList.get(0).getColumn().equals(maximumThresholdColumn))
>>
>> {
>> Collections.sort(effectConfigurationCache, new
>> Comparator() {
>> public int compare(EffectConfiguration o1,
>> EffectConfiguration o2) {
>> ..
>> .
>> }
>> });
>>
>> }
>>
>> This seems to be quite cumbersome !
>> Can this be done more elegantly?
>>
>> Previously we used the ListDataProvider, and here sorting is
>> implemented directly on the ListHandler by setting a comparator for
>> each column, wich we think is a elegant way to do it!
>
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Re: Column sorting using async dataprovider in celltable
Forgot to mention that an example of both ListDataProvider and
AsyncDataProvider can be found here:
- http://code.google.com/intl/da/webtoolkit/doc/latest/DevGuideUiCellTable.html
We think that the sorting inside the AsyncDataProvider breaks the idea
of separation of view and data.
Or have we totally misunderstood when to use AsyncDataProvider vs
ListDataProvider? Or how sorting is implemented.
On 27 Sep., 16:41, jgm wrote:
> Hello,
>
> We are using an async dataprovider in our celltable, and we have had
> some problemt gettting the sorting to work.
>
> In the OnRangeChanged method, we implement sorting this way:
>
> if (sortList.get(0).getColumn().equals(costManagementNameColumn)) {
> Collections.sort(effectConfigurationCache, new
> Comparator() {
> public int compare(EffectConfiguration o1,
> EffectConfiguration o2) {
> if (o1 == o2) {
> return 0;
> }
> // Compare the cost management name columns.
> int diff = -1;
> if (o1 != null) {
> diff = (o2 != null) ?
> o1.getCostManagementName().compareTo(o2.getCostManagementName()) : 1;
> }
> return sortList.get(0).isAscending() ? diff : -diff;
> }
> });} else if (sortList.get(0).getColumn().equals(orgUnitNameColumn)) {
>
> Collections.sort(effectConfigurationCache, new
> Comparator() {
> public int compare(EffectConfiguration o1,
> EffectConfiguration o2) {
> .
> .
> }
> });} else if
> (sortList.get(0).getColumn().equals(effectTypeNameColumn)) {
>
> Collections.sort(effectConfigurationCache, new
> Comparator() {
> public int compare(EffectConfiguration o1,
> EffectConfiguration o2) {
> ..
> .
> }
> });} else if
> (sortList.get(0).getColumn().equals(maximumThresholdColumn))
>
> {
> Collections.sort(effectConfigurationCache, new
> Comparator() {
> public int compare(EffectConfiguration o1,
> EffectConfiguration o2) {
> ..
> .
> }
> });
>
> }
>
> This seems to be quite cumbersome !
> Can this be done more elegantly?
>
> Previously we used the ListDataProvider, and here sorting is
> implemented directly on the ListHandler by setting a comparator for
> each column, wich we think is a elegant way to do it!
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Column sorting using async dataprovider in celltable
Hello,
We are using an async dataprovider in our celltable, and we have had
some problemt gettting the sorting to work.
In the OnRangeChanged method, we implement sorting this way:
if (sortList.get(0).getColumn().equals(costManagementNameColumn)) {
Collections.sort(effectConfigurationCache, new
Comparator() {
public int compare(EffectConfiguration o1, EffectConfiguration
o2) {
if (o1 == o2) {
return 0;
}
// Compare the cost management name columns.
int diff = -1;
if (o1 != null) {
diff = (o2 != null) ?
o1.getCostManagementName().compareTo(o2.getCostManagementName()) : 1;
}
return sortList.get(0).isAscending() ? diff : -diff;
}
});
} else if (sortList.get(0).getColumn().equals(orgUnitNameColumn)) {
Collections.sort(effectConfigurationCache, new
Comparator() {
public int compare(EffectConfiguration o1, EffectConfiguration
o2) {
.
.
}
});
} else if (sortList.get(0).getColumn().equals(effectTypeNameColumn)) {
Collections.sort(effectConfigurationCache, new
Comparator() {
public int compare(EffectConfiguration o1, EffectConfiguration
o2) {
..
.
}
});
} else if (sortList.get(0).getColumn().equals(maximumThresholdColumn))
{
Collections.sort(effectConfigurationCache, new
Comparator() {
public int compare(EffectConfiguration o1, EffectConfiguration
o2) {
..
.
}
});
}
This seems to be quite cumbersome !
Can this be done more elegantly?
Previously we used the ListDataProvider, and here sorting is
implemented directly on the ListHandler by setting a comparator for
each column, wich we think is a elegant way to do it!
--
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