package org.snmp4j.mp;

import java.util.Iterator;
import java.util.Vector;
import org.snmp4j.event.CounterEvent;
import org.snmp4j.event.CounterListener;

/* JADX INFO: loaded from: classes.dex */
public class CounterSupport {
    protected static CounterSupport instance;
    private transient Vector<CounterListener> counterListeners;

    protected CounterSupport() {
    }

    public static CounterSupport getInstance() {
        if (instance == null) {
            instance = new CounterSupport();
        }
        return instance;
    }

    public synchronized void addCounterListener(CounterListener counterListener) {
        if (this.counterListeners == null) {
            this.counterListeners = new Vector<>(2);
        }
        if (!this.counterListeners.contains(counterListener)) {
            this.counterListeners.add(counterListener);
        }
    }

    public void fireIncrementCounter(CounterEvent counterEvent) {
        Vector<CounterListener> vector = this.counterListeners;
        if (vector != null) {
            Iterator<CounterListener> it = vector.iterator();
            while (it.hasNext()) {
                it.next().incrementCounter(counterEvent);
            }
        }
    }

    public synchronized void removeCounterListener(CounterListener counterListener) {
        if (this.counterListeners != null && this.counterListeners.contains(counterListener)) {
            this.counterListeners.removeElement(counterListener);
        }
    }
}