public Object clone() throws CloneNotSupportedException {
ColumnStat stat = (ColumnStat) super.clone();
initFromProto();
stat.column = (Column) this.column.clone();
stat.numDistVals = numDistVals;
stat.numNulls = numNulls;
stat.minValue = minValue;
stat.maxValue = maxValue;
return stat;
}
public String toString() {
initFromProto();
Gson gson =
new GsonBuilder().setPrettyPrinting().excludeFieldsWithoutExposeAnnotation().create();
return gson.toJson(this);
}