I am having some issues setting up a simple Tomahawk datatable that is sortable
and as an extra, I've added in the Ajax4jsf tags to try to make the sort
requests function as Ajax requests. The issue I am having is that the table
renders fine on the initial display. When I click a column header, the
data-rows display goes blank and the server log says:
| ...
| 08:31:43,564 ERROR org.apache.myfaces.component.html.ext.SortableModel -
java.lang.IllegalStateException: row not available
| ...
|
This line is repeated 100 times - there are 100 rows in my data set. If I
simply click the same column header again, it will display correctly (with
sorting). If I then, click again, another blank data display with the same
error messages, and so on...
My question is - does anyone know how to 'do' this correctly with Tomahawk and
Ajax4Jsf?
Please - no suggestions like use Icefaces - until I can find instructions that
tell me exactly what files to edit to integrate it into a Seam JSF app (Seam
1.2) I don't want to waste time. Also, Richfaces doesn't even seem to support
clickable sorting on a datatable. That leaves just Tomahawk for this kind of
functionality.
Here is my code.
The backing bean:
| @Name("tableBacker")
| @Scope(ScopeType.SESSION)
| public class TableBacker {
|
| @Logger
| private Log log;
|
| @DataModel
| private List<DataRow> dataRows;
|
| @DataModelSelection
| private DataRow dataRow;
|
| @Factory("dataRows")
| public void getDataRows() {
| log.info("dataRows");
| if (dataRows == null) {
| generateDataRows();
| }
| }
|
| private final void generateDataRows() {
| log.info("generateDataRows()");
| dataRows = new ArrayList<DataRow>();
| Random random = new Random(System.currentTimeMillis());
| for (long i = 0; i < 100; i++) {
| //DataRow(long id, String name, Date rowDate, String
description)
| final long randomTime = System.currentTimeMillis()
| + random.nextInt(86400 * 10) * ((random.nextBoolean()) ? -1
: 1);
| final byte[] byteArray = new byte[
| 25 + random.nextInt(10) * ((random.nextBoolean()) ? -1 : 1)
| ];
| dataRows.add(
| new DataRow(
| i,
| "DataRow #" + i,
| new java.util.Date(randomTime),
| new StringBuffer(String.valueOf(i)).append(" -
").append(byteArray).toString()
| )
| );
| }
| }
| }
|
The Facelets XHTML view:
| <h:form>
| <a4j:outputPanel id="dataRowsPanel">
| The Data:
| <a4j:status>
| <f:facet name="start">
| <h:graphicImage value="./img/spinner.gif"/>
| </f:facet>
| </a4j:status>
| <br/>
| <t:dataTable id="dataRows" var="dataRow" value="#{dataRows}" rows="15"
| sortColumn="#{id}" sortAscending="false"
| preserveDataModel="true" preserveSort="true">
| <t:column defaultSorted="true" sortable="true">
| <f:facet name="header">
| <t:commandSortHeader columnName="id" arrow="true">
| <h:outputText value="Row ID"/>
| <a4j:support event="onclick" reRender="dataRowsPanel"/>
| </t:commandSortHeader>
| </f:facet>
| <h:outputText value="#{dataRow.id}"/>
| </t:column>
| <t:column sortable="true">
| <f:facet name="header">
| <t:commandSortHeader columnName="name" arrow="true">
| <h:outputText value="Row Data"/>
| <a4j:support event="onclick" reRender="dataRowsPanel"/>
| </t:commandSortHeader>
| </f:facet>
| <h:outputText value="#{dataRow.name}"/>
| </t:column>
| <t:column sortable="true">
| <f:facet name="header">
| <t:commandSortHeader columnName="rowDate" arrow="true">
| <h:outputText value="Row Date"/>
| </t:commandSortHeader>
| </f:facet>
| <h:outputText value="#{dataRow.rowDate}"/>
| </t:column>
| <t:column sortable="true">
| <f:facet name="header">
| <t:commandSortHeader columnName="rowDate" arrow="true">
| <h:outputText value="description"/>
| </t:commandSortHeader>
| </f:facet>
| <h:outputText value="#{dataRow.description}"/>
| </t:column>
| </t:dataTable>
| </a4j:outputPanel>
| </h:form>
|
Thanks,
Brad Smith
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