throws IOException {
encoder.appendString("{");
AkibanAppender appender = encoder.getAppender();
int ncols = resultColumns.size();
for (int i = 0; i < ncols; i++) {
JsonResultColumn resultColumn = resultColumns.get(i);
encoder.appendString((i == 0) ? "\"" : ",\"");
Quote.DOUBLE_QUOTE.append(appender, resultColumn.getName());
encoder.appendString("\":");
ValueSource value = row.value(i);
TInstance columnTInstance = resultColumn.getType();
if (columnTInstance.typeClass() instanceof AkResultSet) {
outputNestedResultSet((Cursor)value.getObject(),
resultColumn.getNestedResultColumns());
}
else {
FormatOptions options = context.getServer().getFormatOptions();
columnTInstance.formatAsJson(value, appender, options);
}