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ZeroMQ implementation of the JMS API

There is a newer version: 3.0.1-RELEASE

package org.zeromq.jms.protocol.store;
/*
 * Copyright (c) 2015 Jeremy Miller
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
import java.util.Date;

import org.zeromq.jms.ZmqMessage;

/**
 * Class defines the journal entry from the message store.
 */
public class ZmqJournalEntry {

    private final Object messageId;
    private final Date createDate;
    private final boolean deleteFlag;
    private final ZmqMessage message;

    /**
     * Create journal entry.
     * @param messageId   the unique message identifier
     * @param createDate  the entry creation date
     * @param deleteFlag  the entry has been deleted
     * @param message     the message
     */
    public ZmqJournalEntry(final Object messageId, final Date createDate, final boolean deleteFlag, final ZmqMessage message) {
        this.messageId = messageId;
        this.createDate = createDate;
        this.deleteFlag = deleteFlag;
        this.message = message;
    }

    /**
     * @return  return the unique message identifier
     */
    public Object getMessageId() {
        return messageId;
    }

    /**
     * @return  return the creation date of the journal entry
     */
    public Date getCreateDate() {
        return createDate;
    }

    /**
     * @return  return the true when the entry has been flagged as deleted
     */
    public boolean isDeleted() {
        return deleteFlag;
    }

    /**
     * @return  return the message
     */
    public ZmqMessage getMessage() {
        return message;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((messageId == null) ? 0 : messageId.hashCode());
        return result;
    }

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

        if (obj == null) {
            return false;
        }

        if (getClass() != obj.getClass()) {
            return false;
        }

        ZmqJournalEntry other = (ZmqJournalEntry) obj;

        if (messageId == null) {
            if (other.messageId != null) {
                return false;
            }
        } else if (!messageId.equals(other.messageId)) {
            return false;
        }

        return true;
    }

    @Override
    public String toString() {
        return "ZmqJournalEntry [messageId=" + messageId + ", createDate=" + createDate + ", deleteFlag=" + deleteFlag
                + ", message=" + message + "]";
    }
}