oh great. i bit more complicated but it's possible.

thx

enjoy with richfaces 4 @JSF2

i have look in demo before ask it but i have look in datatable et datascoller component.

Not in colum...

i cant make it work...

my list is always empty.

My xhtml simplify:

<rich:dataTable value="#{logSpeosDataModel}" var="log" rows="20" reRender="ds" id="simpletable">
 <f:facet name="header">
 <rich:columnGroup>
 <rich:column>
 <h:outputText value="ID" />
 </rich:column>
 <rich:column>
 <h:outputText value="Application" />
 </rich:column>
 </rich:columnGroup>
 </f:facet>
 <rich:column>
 <h:outputText value="#{log.id}" />
 </rich:column>
 <rich:column>
 <h:outputText value="#{log.url.application.name}" />
 </rich:column>
 <f:facet name="footer">
 <rich:datascroller id="ds" renderIfSinglePage="false" limitToList="true" />
 </f:facet>
</rich:dataTable>

package be.speos.action;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.faces.context.FacesContext;
import javax.persistence.EntityManager;
import javax.persistence.Query;

import org.ajax4jsf.model.DataVisitor;
import org.ajax4jsf.model.Range;
import org.ajax4jsf.model.SequenceRange;
import org.ajax4jsf.model.SerializableDataModel;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;

import be.speos.entity.LogSpeos;

/**
 *
 * @author ias This is example class that intended to demonstrate use of
 * ExtendedDataModel and SerializableDataModel. This implementation
 * intended to be used as a request scope bean. However, it actually
 * provides serialized state, so on a post-back we do not load data from
 * the data provider. Instead we use data that was used during
 * rendering. This data model must be used together with Data Provider,
 * which is responsible for actual data load from the database using
 * specific filtering and sorting. Normally Data Provider must be in
 * either session, or conversation scope.
 */
@Name("logSpeosDataModel")
public class LogSpeosDataModel extends SerializableDataModel {

 private Long currentPk;
 private Map<Long, LogSpeos> wrappedData = new HashMap<Long, LogSpeos>();
 private ArrayList<Long> wrappedKeys = null;
 @In
 EntityManager entityManager;

 private static final long serialVersionUID = -1956179896877538628L;

 /**
 * This method never called from framework. (non-Javadoc)
 *
 * @see org.ajax4jsf.model.ExtendedDataModel#getRowKey()
 */
 @Override
 public Object getRowKey() {
 return currentPk;
 }

 /**
 * This method normally called by Visitor before request Data Row.
 */
 @Override
 public void setRowKey(Object key) {
 this.currentPk = (Long) key;

 }

 /**
 * This is main part of Visitor pattern. Method called by framework many
 * times during request processing.
 */
 @Override
 public void walk(FacesContext context, DataVisitor visitor, Range range, Object argument) throws IOException {
 int firstRow = ((SequenceRange) range).getFirstRow();
 int numberOfRows = ((SequenceRange) range).getRows();
 wrappedKeys = new ArrayList<Long>();
 /*
 * for (AuctionItem item:dataProvider.getItemsByrange(new
 * Integer(firstRow), numberOfRows, null, true)) {
 * wrappedKeys.add(item.getPk()); wrappedData.put(item.getPk(), item);
 * visitor.process(context, item.getPk(), argument); }
 */
 System.out.println("***************in walk - " + range + " - " + firstRow + " - " + numberOfRows);
 Query query = entityManager.createQuery("SELECT c FROM LogSpeos AS c ORDER BY ID DESC");
 query.setFirstResult(firstRow);
 query.setMaxResults(20);
 List<LogSpeos> logList = query.getResultList();
 for (LogSpeos log : logList) {
 wrappedKeys.add(log.getId());
 wrappedData.put(log.getId(), log);
 visitor.process(context, log.getId(), argument);
 }

 }

 /**
 * This method must return actual data rows count from the Data Provider. It
 * is used by pagination control to determine total number of data items.
 */
 @Override
 public int getRowCount() {
 System.out.println("************************in getRowCount()");
 Query query = entityManager.createQuery("SELECT COUNT(c) FROM LogSpeos AS c");
 Long tmp = (Long) query.getSingleResult();
 System.out.println("long: " + tmp);
 return tmp.intValue();
 }

 /**
 * This is main way to obtain data row. It is intensively used by framework.
 * We strongly recommend use of local cache in that method.
 */
 @Override
 public Object getRowData() {
 System.out.println("************************in getRowData() " + currentPk);
 if (currentPk == null) {
 return null;
 } else {
 LogSpeos ret = wrappedData.get(currentPk);
 if (ret == null) {
 Query query = entityManager.createQuery("SELECT c FROM LogSpeos AS c WHERE c.id=:pk");
 query.setParameter("pk", currentPk);
 ret = (LogSpeos) query.getSingleResult();
 wrappedData.put(currentPk, ret);
 return ret;
 } else {
 return ret;
 }
 }
 }

 /**
 * Unused rudiment from old JSF staff.
 */
 @Override
 public int getRowIndex() {
 throw new UnsupportedOperationException();
 }

 /**
 * Unused rudiment from old JSF staff.
 */
 @Override
 public Object getWrappedData() {
 throw new UnsupportedOperationException();
 }

 /**
 * Never called by framework.
 */
 @Override
 public boolean isRowAvailable() {
 if (currentPk == null) {
 return false;
 } else {
 Query query = entityManager.createQuery("SELECT c FROM LogSpeos AS c WHERE c.id=:pk");
 query.setParameter("pk", currentPk);
 if (query.getSingleResult() != null)
 return false;
 else
 return true;
 }
 }

 /**
 * Unused rudiment from old JSF staff.
 */
 @Override
 public void setRowIndex(int rowIndex) {
 throw new UnsupportedOperationException();
 }

 /**
 * Unused rudiment from old JSF staff.
 */
 @Override
 public void setWrappedData(Object data) {
 throw new UnsupportedOperationException();
 }

 /**
 * This method suppose to produce SerializableDataModel that will be
 * serialized into View State and used on a post-back. In current
 * implementation we just mark current model as serialized. In more
 * complicated cases we may need to transform data to actually serialized
 * form.
 */
 public SerializableDataModel getSerializableModel(Range range) {
 if (wrappedKeys != null) {
 return this;
 } else {
 return null;
 }
 }

 @Override
 public void update() {
 System.out.println("**************************** in UPDATE");

 }

}

and i use seam 2.2.0 with richfaces 3.3.1 on jboss 4.2.3.

jboss, what else? ;)

Someone make a article on the wiki for this? :D

I have make a DataProvider like in the richfaces sample.

but the function getItemsByrange() don't receive good argument. why?

public List<LogSpeos> getItemsByrange(Integer startPk, int numberOfRows, String sortField, boolean ascending) {
 List<LogSpeos> ret = new ArrayList<LogSpeos>();
 System.out.println("********************** IN getItemsByrange - " + startPk + " - " + numberOfRows + " - " + sortField + " - " + ascending);
 Query q = entityManager.createQuery("SELECT l FROM LogSpeos l");
 q.setFirstResult(startPk);
 q.setMaxResults(numberOfRows);
 ret = q.getResultList();
 return ret;
 }

the number of row is -1 but un my rich:datatable in xhtml i have:

rows="20"

If i force 20 in numberOfRows i have only the 20 first row, no datascroller...

ok it's work without filterBy in the rich:column...

now how filter...