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mqtt-client provides an ASL 2.0 licensed API to MQTT. It takes care of automatically reconnecting to your MQTT server and restoring your client session if any network failures occur. Applications can use a blocking API style, a futures based API, or a callback/continuations passing API style.

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/**
 * Copyright (C) 2010-2012, FuseSource Corp.  All rights reserved.
 *
 *     http://fusesource.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.fusesource.mqtt.client;

import org.fusesource.hawtbuf.UTF8Buffer;

/**
 * 
 * 
 *
 * @author Hiram Chirino
 */
public class Topic {

    private final UTF8Buffer name;
    private final QoS qos;

    public Topic(String name, QoS qos) {
        this(new UTF8Buffer(name), qos);
    }

    public Topic(UTF8Buffer name, QoS qos) {
        this.name = name;
        this.qos = qos;
    }

    public UTF8Buffer name() {
        return name;
    }

    public QoS qos() {
        return qos;
    }

    @Override
    public boolean equals(Object o) {
        if (o == null) return false;
        if (o.getClass() != this.getClass()) return false;
        if (this == o) return true;

        Topic topic = (Topic) o;

        if (name != null ? !name.equals(topic.name) : topic.name != null) return false;
        if (qos != topic.qos) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = name != null ? name.hashCode() : 0;
        result = 31 * result + (qos != null ? qos.hashCode() : 0);
        return result;
    }

    @Override
    public String toString() {
        return "{ name=" + name +
                ", qos=" + qos +
                " }";
    }
}