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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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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.ejb.client;

import java.io.UnsupportedEncodingException;

/**
 * @author David M. Lloyd
 */
public final class UserTransactionID extends TransactionID {

    private static final long serialVersionUID = -791647046784989955L;

    private final transient String nodeName;

    UserTransactionID(final byte[] encodedForm) {
        super(encodedForm);
        // first byte is the header
        if (encodedForm[0] != 0x01) {
            throw wrongFormat();
        }
        final int totalEncodedLength = encodedForm.length;
        // second byte of the encoded form is the length of the nodename bytes
        final int nodeNameLength = encodedForm[1];
        if (nodeNameLength <= 0) {
            throw wrongFormat();
        }
        // next bytes are the nodename
        try {
            nodeName = new String(encodedForm, 2, nodeNameLength, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw wrongFormat();
        }
        if (totalEncodedLength < nodeNameLength + 4) {
            throw wrongFormat();
        }
        // the rest is the unique ID
    }

    UserTransactionID(final String name, final int uniqueId) {
        this(encode(name, uniqueId));
    }

    private static byte[] encode(final String name, final int uniqueId) {
        final byte[] nameBytes;
        try {
            nameBytes = name.getBytes("UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw wrongFormat();
        }
        final int length = nameBytes.length;
        if (length > 255) {
            throw wrongFormat();
        }
        final byte[] target = new byte[6 + length];
        target[0] = 0x01;
        target[1] = (byte) length;
        System.arraycopy(nameBytes, 0, target, 2, length);
        target[2 + length] = (byte) (uniqueId >> 24);
        target[3 + length] = (byte) (uniqueId >> 16);
        target[4 + length] = (byte) (uniqueId >> 8);
        target[5 + length] = (byte) uniqueId;
        return target;
    }

    private static IllegalArgumentException wrongFormat() {
        return new IllegalArgumentException("Wrong session ID format");
    }

    /**
     * Get the associated node name.
     *
     * @return the name
     */
    public String getNodeName() {
        return nodeName;
    }
}