praktikum-holons/src/holeg/utility/math/decimal/Sampler.java

package holeg.utility.math.decimal;

import java.util.HashMap;
import java.util.stream.Collectors;

//To sample floats and get basic statistical values;
public class Sampler {

  public HashMap<String, SampleInfo> logMap = new HashMap<String, SampleInfo>();

  public void addSample(String parameterName, float sample) {
    //Puts the sample in the right LogInfo container or create a new container if not exist jet
    if (logMap.containsKey(parameterName)) {
      SampleInfo info = logMap.get(parameterName);
      info.addSample(sample);
    } else {
      SampleInfo info = new SampleInfo();
      info.parameterName = parameterName;
      info.addSample(sample);
      logMap.put(parameterName, info);
    }
  }

  public String toString() {
    return logMap.values().stream().map(Object::toString).collect(Collectors.joining("\n"));
  }

  public void clear() {
    logMap.clear();
  }

  public class SampleInfo {

    public String parameterName;
    public int sampleSize = 0;
    public float min = Float.MAX_VALUE;
    public float max = Float.MIN_VALUE;
    private float sum = 0;

    public float getAvg() {
      if (sampleSize > 0) {
        return sum / (float) sampleSize;
      }
      return 0;
    }

    public void addSample(float sample) {
      if (sample < min) {
        min = sample;
      }
      if (sample > max) {
        max = sample;
      }
      sum += sample;
      sampleSize++;
    }

    public String toString() {
      return "[" + parameterName + " in Range(" + min + ", " + max + ") with a Average of "
          + getAvg() + " from " + sampleSize + " Smaples]";
    }
  }
}