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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 2011 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.channel.sctp;

import com.sun.nio.sctp.MessageInfo;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.buffer.DefaultByteBufHolder;

/**
 * Representation of SCTP Data Chunk
 */
public final class SctpMessage extends DefaultByteBufHolder {
    private final int streamIdentifier;
    private final int protocolIdentifier;

    private final MessageInfo msgInfo;

    /**
     * Essential data that is being carried within SCTP Data Chunk
     * @param protocolIdentifier of payload
     * @param streamIdentifier that you want to send the payload
     * @param payloadBuffer channel buffer
     */
    public SctpMessage(int protocolIdentifier, int streamIdentifier, ByteBuf payloadBuffer) {
        super(payloadBuffer);
        this.protocolIdentifier = protocolIdentifier;
        this.streamIdentifier = streamIdentifier;
        msgInfo = null;
    }

    /**
     * Essential data that is being carried within SCTP Data Chunk
     * @param msgInfo       the {@link MessageInfo}
     * @param payloadBuffer channel buffer
     */
    public SctpMessage(MessageInfo msgInfo, ByteBuf payloadBuffer) {
        super(payloadBuffer);
        if (msgInfo == null) {
            throw new NullPointerException("msgInfo");
        }
        this.msgInfo = msgInfo;
        streamIdentifier = msgInfo.streamNumber();
        protocolIdentifier = msgInfo.payloadProtocolID();
    }

    /**
     * Return the stream-identifier
     */
    public int streamIdentifier() {
        return streamIdentifier;
    }

    /**
     * Return the protocol-identifier
     */
    public int protocolIdentifier() {
        return protocolIdentifier;
    }

    /**
     * Return the {@link MessageInfo} for inbound messages or {@code null} for
     * outbound messages.
     */
    public MessageInfo messageInfo() {
        return msgInfo;
    }

    /**
     * Return {@code true} if this message is complete.
     */
    public boolean isComplete() {
        if (msgInfo != null) {
            return msgInfo.isComplete();
        }  else {
            //all outbound sctp messages are complete
            return true;
        }
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }

        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        SctpMessage sctpFrame = (SctpMessage) o;

        if (protocolIdentifier != sctpFrame.protocolIdentifier) {
            return false;
        }

        if (streamIdentifier != sctpFrame.streamIdentifier) {
            return false;
        }

        if (!content().equals(sctpFrame.content())) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = streamIdentifier;
        result = 31 * result + protocolIdentifier;
        result = 31 * result + content().hashCode();
        return result;
    }

    @Override
    public SctpMessage copy() {
        if (msgInfo == null) {
            return new SctpMessage(protocolIdentifier, streamIdentifier, content().copy());
        } else {
            return new SctpMessage(msgInfo, content().copy());
        }
    }

    @Override
    public SctpMessage duplicate() {
        if (msgInfo == null) {
            return new SctpMessage(protocolIdentifier, streamIdentifier, content().duplicate());
        } else {
            return new SctpMessage(msgInfo, content().copy());
        }
    }

    @Override
    public SctpMessage retain() {
        super.retain();
        return this;
    }

    @Override
    public SctpMessage retain(int increment) {
        super.retain(increment);
        return this;
    }

    @Override
    public String toString() {
        if (refCnt() == 0) {
            return "SctpFrame{" +
                    "streamIdentifier=" + streamIdentifier + ", protocolIdentifier=" + protocolIdentifier +
                    ", data=(FREED)}";
        }
        return "SctpFrame{" +
                "streamIdentifier=" + streamIdentifier + ", protocolIdentifier=" + protocolIdentifier +
                ", data=" + ByteBufUtil.hexDump(content()) + '}';
    }
}