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);
}
boolean isInSameGroup(FacesContext context, DataTable table, int currentRowIndex) {
table.setRowIndex(currentRowIndex);
Object currentGroupByData = table.getSortBy();
table.setRowIndex(currentRowIndex + 1);
if (!table.isRowAvailable()) return false;
Object nextGroupByData = table.getSortBy();
if (currentGroupByData != null && nextGroupByData.equals(currentGroupByData)) {
return true;
}
return false;
}
protected void encodeSubTable(
FacesContext context, DataTable table, SubTable subTable, int rowIndex, String rowIndexVar)
throws IOException {
table.setRowIndex(rowIndex);
if (!table.isRowAvailable()) {
return;
}
// Row index var
if (rowIndexVar != null) {
context.getExternalContext().getRequestMap().put(rowIndexVar, rowIndex);
}
subTable.encodeAll(context);
if (rowIndexVar != null) {
context.getExternalContext().getRequestMap().remove(rowIndexVar);
}
}
public void encodeTbody(FacesContext context, DataTable table, boolean dataOnly)
throws IOException {
ResponseWriter writer = context.getResponseWriter();
String rowIndexVar = table.getRowIndexVar();
String clientId = table.getClientId(context);
String emptyMessage = table.getEmptyMessage();
UIComponent emptyFacet = table.getFacet("emptyMessage");
SubTable subTable = table.getSubTable();
SummaryRow summaryRow = table.getSummaryRow();
if (table.isSelectionEnabled()) {
table.findSelectedRowKeys();
}
int rows = table.getRows();
int first = table.getFirst();
int rowCount = table.getRowCount();
int rowCountToRender =
rows == 0 ? (table.isLiveScroll() ? table.getScrollRows() : rowCount) : rows;
boolean hasData = rowCount > 0;
if (!dataOnly) {
writer.startElement("tbody", null);
writer.writeAttribute("id", clientId + "_data", null);
writer.writeAttribute("class", DataTable.DATA_CLASS, null);
}
if (hasData) {
for (int i = first; i < (first + rowCountToRender); i++) {
if (subTable != null) {
encodeSubTable(context, table, subTable, i, rowIndexVar);
} else {
table.setRowIndex(i);
if (!table.isRowAvailable()) {
break;
}
encodeRow(context, table, clientId, i, rowIndexVar);
if (summaryRow != null && !isInSameGroup(context, table, i)) {
table.setRowIndex(i); // restore
encodeSummaryRow(context, table, summaryRow);
}
}
}
} else {
// Empty message
writer.startElement("tr", null);
writer.writeAttribute("class", DataTable.EMPTY_MESSAGE_ROW_CLASS, null);
writer.startElement("td", null);
writer.writeAttribute("colspan", table.getColumnsCount(), null);
if (emptyFacet != null) emptyFacet.encodeAll(context);
else writer.write(emptyMessage);
writer.endElement("td");
writer.endElement("tr");
}
if (!dataOnly) {
writer.endElement("tbody");
}
// Cleanup
table.setRowIndex(-1);
if (rowIndexVar != null) {
context.getExternalContext().getRequestMap().remove(rowIndexVar);
}
}