package chat.server.moquette.message;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import io.netty.util.internal.StringUtil;

public class MqttSubAckPayload {

    private final List<Integer> grantedQoSLevels;

    public MqttSubAckPayload(int... grantedQoSLevels) {
        if (grantedQoSLevels == null) {
            throw new NullPointerException("grantedQoSLevels");
        }

        List<Integer> list = new ArrayList<Integer>(grantedQoSLevels.length);
        for (int v: grantedQoSLevels) {
            list.add(v);
        }
        this.grantedQoSLevels = Collections.unmodifiableList(list);
    }

    public MqttSubAckPayload(Iterable<Integer> grantedQoSLevels) {
        if (grantedQoSLevels == null) {
            throw new NullPointerException("grantedQoSLevels");
        }
        List<Integer> list = new ArrayList<Integer>();
        for (Integer v: grantedQoSLevels) {
            if (v == null) {
                break;
            }
            list.add(v);
        }
        this.grantedQoSLevels = Collections.unmodifiableList(list);
    }

    public List<Integer> grantedQoSLevels() {
        return grantedQoSLevels;
    }

    @Override
    public String toString() {
        return new StringBuilder(StringUtil.simpleClassName(this))
            .append('[')
            .append("grantedQoSLevels=").append(grantedQoSLevels)
            .append(']')
            .toString();
    }

}