public void setupCurrentRowVariables() {
if (_evaluatingConverterInsideSetupCurrentRowVariables) {
// Prevent endless recursion in the column.getGroupingValueConverter() call (see below).
// The grouping-related variables are not required during calculation of
// groupingValueConverter,
// so we can just skip this method if _evaluatingConverterInsideSetupCurrentRowVariables ==
// true
return;
}
DataTable dataTable = getDataTable();
Object rowData = dataTable.isRowAvailable() ? dataTable.getRowData() : null;
if (!(rowData instanceof GroupHeaderOrFooter)) {
Components.setRequestVariable(getColumnHeaderVar(), null);
Components.setRequestVariable(getGroupingValueVar(), null);
Components.setRequestVariable(getGroupingValueStringVar(), null);
return;
}
GroupHeaderOrFooter row = (GroupHeaderOrFooter) rowData;
RowGroup rowGroup = row.getRowGroup();
String columnId = rowGroup.getColumnId();
Column column = (Column) dataTable.getColumnById(columnId);
String columnHeader = column.getColumnHeader();
Components.setRequestVariable(getColumnHeaderVar(), columnHeader);
Object groupingValue = rowGroup.getGroupingValue();
Components.setRequestVariable(getGroupingValueVar(), groupingValue);
Converter groupingValueConverter;
_evaluatingConverterInsideSetupCurrentRowVariables = true;
// The upcoming getGroupingValueConverter call can invoke table's setRowIndex, which will result
// re-entering this setupCurrentRowVariables method, so we should prevent endless recursion
// here.
try {
groupingValueConverter = column.getGroupingValueConverter();
} finally {
_evaluatingConverterInsideSetupCurrentRowVariables = false;
}
FacesContext context = FacesContext.getCurrentInstance();
if (groupingValueConverter == null) {
groupingValueConverter =
groupingValue != null
? Rendering.getConverterForType(context, groupingValue.getClass())
: null;
}
String groupingValueStr =
groupingValueConverter != null
? groupingValueConverter.getAsString(context, column, groupingValue)
: groupingValue != null ? groupingValue.toString() : "";
Components.setRequestVariable(getGroupingValueStringVar(), groupingValueStr);
}
public void acceptNewGroupingRules(List<GroupingRule> groupingRules) {
if (beforeUpdateValuesPhase) {
incomingGroupingRules = groupingRules;
return;
}
DataTable dataTable = getDataTable();
for (GroupingRule sortingRule : groupingRules) {
String columnId = sortingRule.getColumnId();
BaseColumn column = dataTable.getColumnById(columnId);
if (column == null) throw new IllegalArgumentException("Column by id not found: " + columnId);
if (!column.isColumnGroupable())
throw new IllegalArgumentException(
"Column (id = "
+ columnId
+ ") is not groupable. Column class is "
+ column.getClass()
+ " ; specify sortingExpression or groupingExpression for <o:column> to "
+ "make it groupable");
}
setGroupingRules(groupingRules);
}