Problem using dataTable with ExtendedDataModel on an SEAM up
I am using SEAM 2.1.2 on Jboss 5.1.0GA, I cannot get dataTable to work. The problem is that none of my data show up. I used a debugger to trace on what is going on. It seems that
- The "getRowCount()" returns the correct number;
- The the "walk()" method is never called. Neither any of the methods related to the "key".
- What is repeatedly called was "isRowAvailable()" and "setRowIndex()"
As I understand the "walk()" is supposed to do the work. I am obviously missing something really obvious so that that is not called; just I cannot see it. How does the table on the page and data model to communicate which column is the key?
I used the richFaces HinernateDataModel example and simplified it to just what is left in the following for testing,
import java.io.IOException;
import java.util.List;
import javax.faces.context.FacesContext;
import org.ajax4jsf.model.DataVisitor;
import org.ajax4jsf.model.ExtendedDataModel;
import org.ajax4jsf.model.Range;
import org.ajax4jsf.model.SequenceRange;
import org.jboss.seam.Component;
import org.richfaces.model.FilterField;
import org.richfaces.model.Modifiable;
import org.richfaces.model.SortField2;
import com.way.wcc.model.User;
import com.way.wcc.model.UserSearch;
import com.way.wcc.user.dao.UserDao;
public class TestDataModel extends ExtendedDataModel implements Modifiable {
private Integer rowKey;
private User dataItem;
private SequenceRange cachedRange;
private List<User> cachedItems;
private static boolean areEqualRanges(SequenceRange range1, SequenceRange range2) {
if (range1 == null || range2 == null) {
return range1 == null && range2 == null;
} else {
return range1.getFirstRow() == range2.getFirstRow() && range1.getRows() == range2.getRows();
}
}
@Override
public Object getRowKey() {
return rowKey;
}
@Override
public void setRowKey(Object key) {
this.rowKey = (Integer) key;
this.dataItem = null;
if (this.rowKey != null) {
UserDao userDao = (UserDao)Component.getInstance("userDao");
this.dataItem = (User) userDao.getUser(rowKey);
}
}
@Override
public void walk(FacesContext facesContext, DataVisitor visitor, Range range,
Object argument) throws IOException {
SequenceRange sequenceRange = (SequenceRange) range;
int first = 0;
int rows = 5;
if (this.cachedItems == null || !areEqualRanges(this.cachedRange, sequenceRange)) {
if (sequenceRange != null) {
first = sequenceRange.getFirstRow();
rows = sequenceRange.getRows();
}
this.cachedRange = sequenceRange;
UserDao userDao = (UserDao)Component.getInstance("userDao");
this.cachedItems = userDao.findUsers(new UserSearch(), first, rows);
}
for (User item: cachedItems) {
visitor.process(facesContext, item.getId(), argument);
}
}
@Override
public int getRowCount() {
UserDao userDao = (UserDao)Component.getInstance("userDao");
return userDao.findUserCount(new UserSearch());
}
@Override
public Object getRowData() {
return this.dataItem;
}
@Override
public int getRowIndex() {
return -1;
}
@Override
public Object getWrappedData() {
return null;
}
@Override
public boolean isRowAvailable() {
return (this.dataItem != null);
}
@Override
public void setRowIndex(int rowIndex) {
}
@Override
public void setWrappedData(Object data) {
}
public void modify(List<FilterField> filterFields, List<SortField2> sortFields) {
this.cachedItems = null;
this.cachedRange = null;
}
}
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:rich="http://richfaces.org/rich">
<style>
.rich-filter-input{
width:50px;
}
</style>
<h:form>
<a4j:queue requestDelay="100" />
<rich:messages />
<rich:dataTable value="#{userListController.userList}" var="row" rows="10"
reRender="datascroller" width="650">
<h:column>
<h:outputText value="#{row.firstName}" />
</h:column>
<f:facet name="footer">
<rich:datascroller id="datascroller" />
</f:facet>
</rich:dataTable>
</h:form>
</ui:composition>
