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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2014 The Netty Project
 *
 * The Netty Project licenses this file to you 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 io.netty.handler.codec.mqtt;

import io.netty.buffer.ByteBuf;
import io.netty.handler.codec.DecoderResult;

/**
 * Utility class with factory methods to create different types of MQTT messages.
 */
public final class MqttMessageFactory {

    public static MqttMessage newMessage(MqttFixedHeader mqttFixedHeader, Object variableHeader, Object payload) {
        switch (mqttFixedHeader.messageType()) {
            case CONNECT :
                return new MqttConnectMessage(
                        mqttFixedHeader,
                        (MqttConnectVariableHeader) variableHeader,
                        (MqttConnectPayload) payload);

            case CONNACK:
                return new MqttConnAckMessage(mqttFixedHeader, (MqttConnAckVariableHeader) variableHeader);

            case SUBSCRIBE:
                return new MqttSubscribeMessage(
                        mqttFixedHeader,
                        (MqttMessageIdVariableHeader) variableHeader,
                        (MqttSubscribePayload) payload);

            case SUBACK:
                return new MqttSubAckMessage(
                        mqttFixedHeader,
                        (MqttMessageIdVariableHeader) variableHeader,
                        (MqttSubAckPayload) payload);

            case UNSUBACK:
                return new MqttUnsubAckMessage(
                        mqttFixedHeader,
                        (MqttMessageIdVariableHeader) variableHeader);

            case UNSUBSCRIBE:
                return new MqttUnsubscribeMessage(
                        mqttFixedHeader,
                        (MqttMessageIdVariableHeader) variableHeader,
                        (MqttUnsubscribePayload) payload);

            case PUBLISH:
                return new MqttPublishMessage(
                        mqttFixedHeader,
                        (MqttPublishVariableHeader) variableHeader,
                        (ByteBuf) payload);

            case PUBACK:
                return new MqttPubAckMessage(mqttFixedHeader, (MqttMessageIdVariableHeader) variableHeader);
            case PUBREC:
            case PUBREL:
            case PUBCOMP:
                return new MqttMessage(mqttFixedHeader, variableHeader);

            case PINGREQ:
            case PINGRESP:
            case DISCONNECT:
                return new MqttMessage(mqttFixedHeader);

            default:
                throw new IllegalArgumentException("unknown message type: " + mqttFixedHeader.messageType());
        }
    }

    public static MqttMessage newInvalidMessage(Throwable cause) {
        return new MqttMessage(null, null, null, DecoderResult.failure(cause));
    }

    public static MqttMessage newInvalidMessage(MqttFixedHeader mqttFixedHeader, Object variableHeader,
                                                Throwable cause) {
        return new MqttMessage(mqttFixedHeader, variableHeader, null, DecoderResult.failure(cause));
    }

    private MqttMessageFactory() { }
}