java/Crawler/model/Statistics.java

package model;

import java.util.HashMap;
import java.util.Map;
import java.util.function.BiFunction;

public class Statistics<T> {
    private final Map<String, Integer> counters;
    private final Map<String, Double> measurements;
    private final Map<String, String> attributes;
    private final T context;

    public Statistics(T context) {
        this.context = context;
        this.counters = new HashMap<>();
        this.measurements = new HashMap<>();
        this.attributes = new HashMap<>();
    }

    public void increment(String key) {
        counters.merge(key, 1, Integer::sum);
    }

    public void increment(String key, int delta) {
        counters.merge(key, delta, Integer::sum);
    }

    public void record(String key, double value) {
        measurements.put(key, value);
    }

    public void record(String key, String value) {
        attributes.put(key, value);
    }

    public int getCount(String key) {
        return counters.getOrDefault(key, 0);
    }

    public double getMeasurement(String key) {
        return measurements.getOrDefault(key, 0.0);
    }

    public String getAttribute(String key) {
        return attributes.get(key);
    }

    public Map<String, Integer> getAllCounters() {
        return new HashMap<>(counters);
    }

    public Map<String, Double> getAllMeasurements() {
        return new HashMap<>(measurements);
    }

    public Map<String, String> getAllAttributes() {
        return new HashMap<>(attributes);
    }

    public T getContext() {
        return context;
    }

    public void clear() {
        counters.clear();
        measurements.clear();
        attributes.clear();
    }

    public String toString() {
        return String.format("Statistics{context=%s, counters=%s, measurements=%s}",
                context, counters, measurements);
    }
}