/**
*
*/
package org.richfaces.event.sort;
import javax.faces.context.FacesContext;
import org.richfaces.component.Column;
import org.richfaces.component.UIScrollableDataTable;
import org.richfaces.component.util.ColumnUtil;
import org.richfaces.model.SortField;
import org.richfaces.model.SortOrder;
/**
* @author Maksim Kaszynski
*
*/
public class SingleColumnSortListener implements SortListener {
public static final SingleColumnSortListener INSTANCE = new SingleColumnSortListener();
private SingleColumnSortListener() {
}
/* (non-Javadoc)
* @see org.richfaces.event.sort.SortListener#processSort(org.richfaces.event.sort.SortEvent)
*/
public void processSort(SortEvent e) {
UIScrollableDataTable grid = (UIScrollableDataTable) e.getComponent();
int columnIndex = e.getSortColumn();
Column column =
(Column) grid.getChildren().get(columnIndex);
String name = ColumnUtil.getColumnSorting(column);
SortOrder sortOrder = grid.getSortOrder();
if (sortOrder == null) {
sortOrder = new SortOrder();
grid.setSortOrder(sortOrder);
if (grid.getValueBinding("sortOrder") != null) {
grid.getValueBinding("sortOrder").setValue(FacesContext.getCurrentInstance(), sortOrder);
}
}
SortField[] fields = sortOrder.getFields();
SortField newField = new SortField(name, columnIndex, Boolean.TRUE);
if (fields != null) {
for (int i = 0; i < fields.length; i++) {
SortField sortField = fields[i];
if (sortField.getIndex() == columnIndex ||
(sortField.getName() != null &&
name != null &&
name.equals(sortField.getName()))) {
Boolean asc = sortField.getAscending();
asc = Boolean.TRUE.equals(asc) ? Boolean.FALSE : Boolean.TRUE;
newField = new SortField(name, columnIndex, asc);
break;
}
}
}
sortOrder.setFields(new SortField[] {newField});
}
}