package net.iponweb.disthene.reader.graphite.functions;
import com.google.common.base.Joiner;
import net.iponweb.disthene.reader.beans.TimeSeries;
import net.iponweb.disthene.reader.exceptions.EvaluationException;
import net.iponweb.disthene.reader.exceptions.InvalidArgumentException;
import net.iponweb.disthene.reader.exceptions.TimeSeriesNotAlignedException;
import net.iponweb.disthene.reader.graphite.PathTarget;
import net.iponweb.disthene.reader.graphite.Target;
import net.iponweb.disthene.reader.graphite.evaluation.TargetEvaluator;
import net.iponweb.disthene.reader.utils.CollectionUtils;
import net.iponweb.disthene.reader.utils.TimeSeriesUtils;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @author Andrei Ivanov
*/
public class SumSeriesWithWildcardsFunction extends DistheneFunction {
public SumSeriesWithWildcardsFunction(String text) {
super(text, "sumSeriesWithWildcards");
}
@Override
public List<TimeSeries> evaluate(TargetEvaluator evaluator) throws EvaluationException {
List<TimeSeries> processedArguments = new ArrayList<>();
processedArguments.addAll(evaluator.eval((Target) arguments.get(0)));
if (processedArguments.size() == 0) return new ArrayList<>();
if (!TimeSeriesUtils.checkAlignment(processedArguments)) {
throw new TimeSeriesNotAlignedException();
}
int[] positions = new int[arguments.size() - 1];
for (int i = 1; i < arguments.size(); i++) {
positions[i - 1] = ((Double) arguments.get(i)).intValue();
}
// put series into buckets according to position
Map<String, List<TimeSeries>> buckets = new HashMap<>();
for (TimeSeries ts : processedArguments) {
String bucketName = getBucketName(ts.getName(), positions);
if (!buckets.containsKey(bucketName)) buckets.put(bucketName, new ArrayList<TimeSeries>());
buckets.get(bucketName).add(ts);
}
// build new time series now
long from = processedArguments.get(0).getFrom();
long to = processedArguments.get(0).getTo();
int step = processedArguments.get(0).getStep();
int length = processedArguments.get(0).getValues().length;
List<TimeSeries> resultTimeSeries = new ArrayList<>();
for (Map.Entry<String, List<TimeSeries>> bucket : buckets.entrySet()) {
TimeSeries timeSeries = new TimeSeries(bucket.getKey(), from, to, step);
Double[] values = new Double[length];
for (int i = 0; i < length; i++) {
List<Double> points = new ArrayList<>();
for (TimeSeries ts : bucket.getValue()) {
points.add(ts.getValues()[i]);
}
values[i] = CollectionUtils.sum(points);
}
timeSeries.setValues(values);
timeSeries.setName(bucket.getKey());
resultTimeSeries.add(timeSeries);
}
return resultTimeSeries;
}
private String getBucketName(String name, int[] positions) {
String[] split = name.split("\\.");
for (int position : positions) {
if (position < split.length) {
split[position] = null;
}
}
return Joiner.on(".").skipNulls().join(split);
}
@Override
public void checkArguments() throws InvalidArgumentException {
if (arguments.size() < 2)
throw new InvalidArgumentException("sumSeriesWithWildcards: number of arguments is " + arguments.size() + ". Must be at least two.");
if (!(arguments.get(0) instanceof PathTarget))
throw new InvalidArgumentException("sumSeriesWithWildcards: argument is " + arguments.get(0).getClass().getName() + ". Must be series");
for (int i = 1; i < arguments.size(); i++) {
if (!(arguments.get(i) instanceof Double))
throw new InvalidArgumentException("sumSeriesWithWildcards: argument " + i + " is " + arguments.get(i).getClass().getName() + ". Must be a number");
}
}
}