package net.iponweb.disthene.reader.graphite.functions;
import net.iponweb.disthene.reader.beans.TimeSeries;
import net.iponweb.disthene.reader.beans.TimeSeriesOption;
import net.iponweb.disthene.reader.exceptions.EvaluationException;
import net.iponweb.disthene.reader.exceptions.InvalidArgumentException;
import net.iponweb.disthene.reader.exceptions.InvalidNumberOfSeriesException;
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.List;
/**
* @author Andrei Ivanov
*/
public class AreaBetweenFunction extends DistheneFunction {
public AreaBetweenFunction(String text) {
super(text, "areaBetween");
}
@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();
}
if (processedArguments.size() != 2) {
throw new InvalidNumberOfSeriesException();
}
processedArguments.get(0).addOption(TimeSeriesOption.STACKED);
processedArguments.get(0).addOption(TimeSeriesOption.INVISIBLE);
processedArguments.get(1).addOption(TimeSeriesOption.STACKED);
processedArguments.get(0).setName(getText());
processedArguments.get(1).setName(getText());
return processedArguments;
}
@Override
public void checkArguments() throws InvalidArgumentException {
if (arguments.size() != 1) throw new InvalidArgumentException("areaBetween: number of arguments is " + arguments.size() + ". Must be one.");
if (!(arguments.get(0) instanceof Target)) throw new InvalidArgumentException("areaBetween: argument is " + arguments.get(0).getClass().getName() + ". Must be series");
}
}