io.netty.handler.codec.mqtt.MqttMessageFactory.java Source code

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Here is the source code for io.netty.handler.codec.mqtt.MqttMessageFactory.java

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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() {
    }
}