Sorting and selection in scrollableDataTable

[tw]

Table and server-side state get out of sync when sorting the table. I see the data model is recreated after clicking the sortable header. The table is then rendered from this on-the-fly created model, with proper sorting. But when I select any of the rows, the row index will now refer to the actual source list of the table, which is not sorted. How an I make sure that the backing list is sorted instead of an internally created model to ensure that selection works?


ModifiableModel$RowKeyWrapperFactory(ObjectWrapperFactory).convertList(List, ObjectConvertor) line: 138
ModifiableModel$RowKeyWrapperFactory(ObjectWrapperFactory).wrapList(List) line: 175
ModifiableModel.sort(List<SortField2>) line: 265
ModifiableModel.modify(List, List<SortField2>) line: 234
HtmlScrollableDataTable(UIScrollableDataTable).createDataModel() line: 223
HtmlScrollableDataTable(UIDataAdaptor).getExtendedDataModel() line: 621
HtmlScrollableDataTable(UIDataAdaptor).getRowCount() line: 248

<rich:scrollableDataTable id="scrollableTestTable"
 value="#{EdtTestBean.rowIds}" var="rowId" selectionMode="multi"
 tableState="#{EdtTestBean.tableState}"
 selection="#{EdtTestBean.selection}" selectedClass="selected"
 rowClasses="tablerow1,tablerow2" columnsWidth="0*" width="100%"
 height="308px">

 <rich:columns id="#{col.name}" value="#{tableColumns}" var="col"
 index="colIndex" label="#{col.description}" sortable="true"
 sortExpression="#{EdtTestBean.getRow(rowId)[colIndex].value}"
 sortIconAscending="dataTableAscIcon"
 sortIconDescending="dataTableDescIcon">
 <f:facet name="header">
 <h:outputText value="#{col.description}" />
 </f:facet>
 <h:outputText value="#{EdtTestBean.getRow(rowId)[colIndex].value}" />
 </rich:columns>
</rich:scrollableDataTable>

[ilya_shaikovsky]

http://livedemo.exadel.com/richfaces-demo/richfaces/scrollableDataTable.jsf

nothing wrong with selection after sorting.

[konstantin.mishin]

We don't sort your backing list. If you wish to sort it you should use your custom model as value.

[tw]

In case anybody is looking for this, here is an example (would be helpful to have this somewhere in the documentation or KB):

 // sortExpression="#{someComponent.getSortValues(rowId)[colIndex]}"

 private ScrollableTableDataModel<Long> tableDataModel = new ScrollableTableDataModel<Long>() {

 @Override
 public List<Long> loadData(int startRow, int endRow, SortOrder sortOrder) {
 // this method is called twice in the case of sorting: first during decode and then during encode, with sort order
 if (sortOrder != null) {
 ScrollableTableDataModel sortableModel = new org.richfaces.model.internal.ComponentSortableDataModel("rowId", rowIds, sortOrder);
 return sortableModel.loadData(startRow, endRow, sortOrder);
 }
 return rowIds;
 }

 @Override
 public int getRowCount() {
 if (rowIds != null) {
 return rowIds.size();
 }
 return 0;
 }

 @Override
 public Object getWrappedData() {
 throw new UnsupportedOperationException();
 }

 @Override
 public void setWrappedData(Object data) {
 throw new UnsupportedOperationException();
 }

 @Override
 public Object getId(Long o) {
 return o.intValue();
 }

};