package net.iponweb.disthene.reader.graphite.functions;
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.Target;
import net.iponweb.disthene.reader.graphite.evaluation.TargetEvaluator;
import net.iponweb.disthene.reader.utils.TimeSeriesUtils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* @author Andrei Ivanov
*/
public class AbsoluteFunction extends DistheneFunction {
public AbsoluteFunction(String text) {
super(text, "absolute");
}
@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();
}
for(TimeSeries timeSeries : processedArguments) {
for(int i = 0; i < timeSeries.getValues().length; i++) {
if (timeSeries.getValues()[i] != null) {
timeSeries.getValues()[i] = Math.abs(timeSeries.getValues()[i]);
}
}
setResultingName(timeSeries);
}
return processedArguments;
}
@Override
public void checkArguments() throws InvalidArgumentException {
if (arguments.size() > 1 || arguments.size() == 0) throw new InvalidArgumentException("absolute: number of arguments is " + arguments.size() + ". Must be one.");
if (!(arguments.get(0) instanceof Target)) throw new InvalidArgumentException("absolute: argument is " + arguments.get(0).getClass().getName() + ". Must be series");
}
}