Please help on rich:scrollableDataTable / ScrollableTableDat
Hi,
I try to have such a component for pagination with a table which has a primary key of type string.
My issue for the moment is that when the setRowKey method of ScrollableTableDataModel extended class is called, I get such an exception:
java.lang.ClassCastException: org.richfaces.model.ScrollableTableDataModel$SimpleRowKey cannot be cast to java.lang.String at org.unludo.iknow.jsf.beans.ObjectObjectDataModel.setRowKey(ObjectObjectDataModel.java:72) at org.richfaces.model.DataModelCache.setRowKey(DataModelCache.java:185) at org.ajax4jsf.component.UIDataAdaptor.setRowKey(UIDataAdaptor.java:351)
I searched but don't knw what to try next.
I post the code:
1/ the xhtml piece:
<rich:scrollableDataTable
height="400px" width="700px" rows="10"
value="#{objectObjectDataModel}" columnClasses="col1" var="objectObjectVO">
<rich:column id="object">
<f:facet name="header">Object</f:facet>
<h:outputText value="#{objectObjectVO.id}" />
</rich:column>
</rich:scrollableDataTable>
2/ The model:
public class ObjectObjectDataModel extends ScrollableTableDataModel {
private String currentPk;
private Map<String,ObjectObjectVO> wrappedData = new HashMap<String,ObjectObjectVO>();
private List<String> wrappedKeys = null;
private ObjectObjectDataProvider dataProvider;
private static Logger logger = Logger.getLogger(ObjectObjectDataModel.class);
/**
*
*/
private static final long serialVersionUID = -1956179896875438628L;
public ObjectObjectDataModel()
{
logger.info("creation of data provider") ;
dataProvider = new ObjectObjectDataProvider();
}
/**
* 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) {
logger.info("setRowKey " + key + key != null ? key.getClass() : "") ;
this.currentPk = (String) 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 {
logger.info("walk visitor " + visitor) ;
int firstRow = ((SequenceRange)range).getFirstRow();
int numberOfRows = ((SequenceRange)range).getRows();
wrappedKeys = new ArrayList<String>();
for (ObjectObjectVO item:getDataProvider().getItemsByrange(firstRow, numberOfRows))
{
wrappedKeys.add(item.getId());
wrappedData.put(item.getId(), item);
visitor.process(context, item.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.
*/
private Integer rowCount; // better to buffer row count locally
@Override
public int getRowCount() {
if (rowCount==null) {
rowCount = new Integer(getDataProvider().getRowCount());
return rowCount.intValue();
} else {
return rowCount.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() {
if (currentPk==null) {
return null;
} else {
ObjectObjectVO ret = wrappedData.get(currentPk);
if (ret==null)
{
ret = (ObjectObjectVO) getDataProvider().getItemByKey(currentPk);
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 {
return getDataProvider().hasObjectObjectVOByPk(currentPk);
}
}
/**
* 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();
}
public ObjectObjectDataProvider getDataProvider()
{
logger.info("data provider has been accessed") ;
return dataProvider;
}
public void setDataProvider(ObjectObjectDataProvider p_o)
{
logger.info("data provider has been set") ;
dataProvider = p_o;
}
@Override
public
List loadData(int arg0, int arg1, SortOrder arg2)
{
Iterable<ObjectObjectVO> it;
it = getDataProvider().getItemsByrange(arg0, arg1);
if(it == null)
{
logger.error("loadData returned null") ;
return null;
}
return (List) it;
}
}3/the data provider
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package org.unludo.iknow.jsf.beans.ObjectObject;
import java.util.List;
import javax.ejb.EJB;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.apache.log4j.Logger;
import org.richfaces.model.DataProvider;
import org.unludo.iKnow.ejb.session.ObjectObjectFacadeLocal;
import org.unludo.iKnow.vo.ObjectObjectVO;
/**
*
* @author Ludovic
*/
@EJB(name="objectobjectfacaderef", beanInterface=ObjectObjectFacadeLocal.class)
public class ObjectObjectDataProvider implements DataProvider
{
private static Logger logger = Logger.getLogger(ObjectObjectDataProvider.class);
ObjectObjectFacadeLocal oObjectObjectFacade;
public ObjectObjectDataProvider()
{
try
{
InitialContext ic = new InitialContext();
oObjectObjectFacade = (ObjectObjectFacadeLocal) ic.lookup("java:comp/env/objectobjectfacaderef");
logger.info("getRowCount oObjectObjectFacade constructor" + oObjectObjectFacade) ;
}
catch (NamingException ex)
{
logger.error("getRowCount oObjectObjectFacade null " + ex) ;
}
}
public
Iterable<ObjectObjectVO> getItemsByrange(int firstRow, int numberOfRows)
{
List<ObjectObjectVO> lvo =oObjectObjectFacade.getList(firstRow, numberOfRows);
logger.info("getItemsByrange first row "+ firstRow + "nb rows " + numberOfRows + " -> " + lvo) ;
return lvo;
}
@Override
public
int getRowCount()
{
Long nbObject = oObjectObjectFacade.count();
logger.info("getRowCount nb objects" + nbObject);
return nbObject.intValue();
}
public
int count()
{
Long nbObject = oObjectObjectFacade.count();
return nbObject.intValue();
}
@Override
public
List getItemsByRange(int arg0, int arg1)
{
return oObjectObjectFacade.getList(arg0, arg1);
}
@Override
public
Object getItemByKey(Object arg0)
{
return oObjectObjectFacade.find((String)arg0);
}
@Override
public
Object getKey(Object arg0)
{
return ((ObjectObjectVO)arg0).getId();
}
public boolean hasObjectObjectVOByPk(String p_sId)
{
return (getItemByKey(p_sId) != null);
}
}
Any help would be greatly appreciated.
Also if some one knows about a consistent example of this component, I would be interested. If not, I will post something if I find a solution.
Thank you
Ludo
