/*
 * Copyright (c) 2000, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

/*
 * @(#)MessageImpl.java	1.58 06/27/07
 */

package com.sun.messaging.jmq.jmsclient;

import javax.jms.*;

import com.sun.messaging.jmq.io.*;
import com.sun.messaging.jmq.ClientConstants;
import com.sun.messaging.AdministeredObject;
import com.sun.messaging.DestinationConfiguration;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Hashtable;
import java.io.*;

import com.sun.messaging.jmq.jmsclient.resources.ClientResources;
import com.sun.messaging.jmq.jmsclient.zip.*;

/**
 * The Message interface is the root interface of all JMS messages. It defines the JMS header and the
 * <CODE>acknowledge</CODE> method used for all messages.
 *
 * <P>
 * Most MOM products treat messages as lightweight entities that consist of a header and a payload. The header contains
 * fields used for message routing and identification; the payload contains the application data being sent.
 *
 * <P>
 * Within this general form, the definition of a message varies significantly across products. It would be quite
 * difficult for JMS to support all of these message models.
 *
 * <P>
 * With this in mind, the JMS message model has the following goals:
 * <UL>
 * <LI>Provide a single, unified message API
 * <LI>Provide an API suitable for creating messages that match the format used by existing non-JMS applications
 * <LI>Support the development of hetrogeneous applications that span operating systems, machine architectures and
 * computer languages
 * <LI>Support messages containing Java objects
 * <LI>Support messages containing Extensible Markup Language (XML) pages
 * </UL>
 *
 * <P>
 * JMS Messages are composed of the following parts:
 * <UL>
 * <LI>Header - All messages support the same set of header fields. Header fields contain values used by both clients
 * and providers to identify and route messages.
 * <LI>Properties - Each message contains a built-in facility for supporting application defined property values.
 * Properties provide an efficient mechanism for supporting application defined message filtering.
 * <LI>Body - JMS defines several types of message body which cover the majority of messaging styles currently in use.
 * </UL>
 *
 * <P>
 * JMS defines five types of message body:
 * <UL>
 * <LI>Stream - a stream of Java primitive values. It is filled and read sequentially.
 * <LI>Map - a set of name-value pairs where names are Strings and values are Java primitive types. The entries can be
 * accessed sequentially or randomly by name. The order of the entries is undefined.
 * <LI>Text - a message containing a java.util.String. The inclusion of this message type is based on our presumption
 * that XML will likely become a popular mechanism for representing content of all kinds including the content of JMS
 * messages.
 * <LI>Object - a message that contains a Serializable java object
 * <LI>Bytes - a stream of uninterpreted bytes. This message type is for literally encoding a body to match an existing
 * message format. In many cases, it will be possible to use one of the other, easier to use, body types instead.
 * Although JMS allows the use of message properties with byte messages it is typically not done since the inclusion of
 * properties may affect the format.
 * </UL>
 *
 * <P>
 * The JMSCorrelationID header field is used for linking one message with another. It typically links a reply message
 * with its requesting message.
 *
 * <P>
 * JMSCorrelationID can hold either a provider-specific message ID, an application-specific String or a provider-native
 * byte[] value.
 *
 * <P>
 * A Message contains a built-in facility for supporting application defined property values. In effect, this provides a
 * mechanism for adding application specific header fields to a message.
 *
 * <P>
 * Properties allow an application, via message selectors, to have a JMS provider select/filter messages on its behalf
 * using application-specific criteria.
 *
 * <P>
 * Property names must obey the rules for a message selector identifier.
 *
 * <P>
 * Property values can be boolean, byte, short, int, long, float, double, and String.
 *
 * <P>
 * Property values are set prior to sending a message. When a client receives a message, its properties are in read-only
 * mode. If a client attempts to set properties at this point, a MessageNotWriteableException is thrown. If
 * <CODE>clearProperties</CODE> is called, the properties can now be both read from and written to. Note that header
 * fields are distinct from properties. Header fields are never in a read-only mode.
 *
 * <P>
 * A property value may duplicate a value in a message's body or it may not. Although JMS does not define a policy for
 * what should or should not be made a property, application developers should note that JMS providers will likely
 * handle data in a message's body more efficiently than data in a message's properties. For best performance,
 * applications should only use message properties when they need to customize a message's header. The primary reason
 * for doing this is to support customized message selection.
 *
 * <P>
 * Message properties support the following conversion table. The marked cases must be supported. The unmarked cases
 * must throw a JMSException. The String to primitive conversions may throw a runtime exception if the primitives
 * <CODE>valueOf()</CODE> method does not accept it as a valid String representation of the primitive.
 *
 * <P>
 * A value written as the row type can be read as the column type.
 *
 * <PRE>
 * |        | boolean byte short int long float double String
 * |----------------------------------------------------------
 * |boolean |    X                                       X
 * |byte    |          X     X    X   X                  X
 * |short   |                X    X   X                  X
 * |int     |                     X   X                  X
 * |long    |                         X                  X
 * |float   |                               X     X      X
 * |double  |                                     X      X
 * |String  |    X     X     X    X   X     X     X      X
 * |----------------------------------------------------------
 * </PRE>
 *
 * <P>
 * In addition to the type-specific set/get methods for properties, JMS provides the <CODE>setObjectProperty</CODE> and
 * <CODE>getObjectProperty</CODE> methods. These support the same set of property types using the objectified primitive
 * values. Their purpose is to allow the decision of property type to made at execution time rather than at compile
 * time. They support the same property value conversions.
 *
 * <P>
 * The <CODE>setObjectProperty</CODE> method accepts values of class Boolean, Byte, Short, Integer, Long, Float, Double
 * and String. An attempt to use any other class must throw a JMSException.
 *
 * <P>
 * The <CODE>getObjectProperty</CODE> method only returns values of class Boolean, Byte, Short, Integer, Long, Float,
 * Double and String.
 *
 * <P>
 * The order of property values is not defined. To iterate through a message's property values, use
 * <CODE>getPropertyNames</CODE> to retrieve a property name enumeration and then use the various property get methods
 * to retrieve their values.
 *
 * <P>
 * A message's properties are deleted by the <CODE>clearProperties</CODE> method. This leaves the message with an empty
 * set of properties.
 *
 * <P>
 * Getting a property value for a name which has not been set returns a null value. Only the
 * <CODE>getStringProperty</CODE> and <CODE>getObjectProperty</CODE> methods can return a null value. The other property
 * get methods must throw a <CODE>java.lang.NullPointerException</CODE> if they are used to get a non-existent property.
 *
 * <P>
 * JMS reserves the `JMSX' property name prefix for JMS defined properties. The full set of these properties is defined
 * in the Java Message Service specification. New JMS defined properties may be added in later versions of JMS. Support
 * for these properties is optional. The <CODE>String[] ConnectionMetaData.getJMSXPropertyNames</CODE> method returns
 * the names of the JMSX properties supported by a connection.
 *
 * <P>
 * JMSX properties may be referenced in message selectors whether or not they are supported by a connection. If they are
 * not present in a message, they are treated like any other absent property. property.
 *
 * <P>
 * JSMX properties `set by provider on send' are available to both the producer and the consumers of the message. JSMX
 * properties `set by provider on receive' are only available to the consumers.
 *
 * <P>
 * JMSXGroupID and JMSXGroupSeq are simply standard properties clients should use if they want to group messages. All
 * providers must support them. Unless specifically noted, the values and semantics of the JMSX properties are
 * undefined.
 *
 * <P>
 * JMS reserves the `JMS_<vendor_name>' property name prefix for provider-specific properties. Each provider defines
 * there own value of <vendor_name>. This is the mechanism a JMS provider uses to make its special per message services
 * available to a JMS client.
 *
 * <P>
 * The purpose of provider-specific properties is to provide special features needed to support JMS use with
 * provider-native clients. They should not be used for JMS to JMS messaging.
 *
 * <P>
 * JMS provides a set of message interfaces that define the JMS message model. It does not provide implementations of
 * these interfaces.
 *
 * <P>
 * Each JMS provider supplies a set of message factories with its Session object for creating instances of these
 * messages. This allows a provider to use implementations tailored to their specific needs.
 *
 * <P>
 * A provider must be prepared to accept message implementations that are not its own. They may not be handled as
 * efficiently as their own implementations; however, they must be handled.
 *
 * <P>
 * A JMS message selector allows a client to specify by message header the messages it's interested in. Only messages
 * whose headers match the selector are delivered. The semantics of not delivered differ a bit depending on the
 * MessageConsumer being used (see QueueReceiver and TopicSubscriber).
 *
 * <P>
 * Message selectors cannot reference message body values.
 *
 * <P>
 * A message selector matches a message when the selector evaluates to true when the message's header field and property
 * values are substituted for their corresponding identifiers in the selector.
 *
 * <P>
 * A message selector is a String, whose syntax is based on a subset of the SQL92 conditional expression syntax.
 *
 * <P>
 * The order of evaluation of a message selector is from left to right within precedence level. Parenthesis can be used
 * to change this order.
 *
 * <P>
 * Predefined selector literals and operator names are written here in upper case; however, they are case insensitive.
 *
 * <P>
 * A selector can contain:
 *
 * <UL>
 * <LI>Literals:
 * <UL>
 * <LI>A string literal is enclosed in single quotes with single quote represented by doubled single quote such as
 * `literal' and `literal''s'; like Java string literals these use the unicode character encoding.
 * <LI>An exact numeric literal is a numeric value without a decimal point such as 57, -957, +62; numbers in the range
 * of Java long are supported. Exact numeric literals use the Java integer literal syntax.
 * <LI>An approximate numeric literal is a numeric value in scientific notation such as 7E3, -57.9E2 or a numeric value
 * with a decimal such as 7., -95.7, +6.2; numbers in the range of Java double are supported. Approximate literals use
 * the Java floating point literal syntax.
 * <LI>The boolean literals TRUE, true, FALSE and false.
 * </UL>
 * <LI>Identifiers:
 * <UL>
 * <LI>An identifier is an unlimited length sequence of Java letters and Java digits, the first of which must be a Java
 * letter. A letter is any character for which the method Character.isJavaLetter returns true. This includes `_' and
 * `$'. A letter or digit is any character for which the method Character.isJavaLetterOrDigit returns true.
 * <LI>Identifiers cannot be the names NULL, TRUE, or FALSE.
 * <LI>Identifiers cannot be NOT, AND, OR, BETWEEN, LIKE, IN, and IS.
 * <LI>Identifiers are either header field references or property references.
 * <LI>Identifiers are case sensitive.
 * <LI>Message header field references are restricted to JMSDeliveryMode, JMSPriority, JMSMessageID, JMSTimestamp,
 * JMSCorrelationID, and JMSType. JMSMessageID, JMSCorrelationID, and JMSType values may be null and if so are treated
 * as a NULL value.
 * <LI>Any name beginning with `JMSX' is a JMS defined property name.
 * <LI>Any name beginning with `JMS_' is a provider-specific property name.
 * <LI>Any name that does not begin with `JMS' is an application-specific property name. If a property is referenced
 * that does not exist in a message its value is NULL. If it does exist, its value is the corresponding property value.
 * </UL>
 * <LI>Whitespace is the same as that defined for Java: space, horizontal tab, form feed and line terminator.
 * <LI>Expressions:
 * <UL>
 * <LI>A selector is a conditional expression; a selector that evaluates to true matches; a selector that evaluates to
 * false or unknown does not match.
 * <LI>Arithmetic expressions are composed of themselves, arithmetic operations, identifiers (whose value is treated as
 * a numeric literal) and numeric literals.
 * <LI>Conditional expressions are composed of themselves, comparison operations and logical operations.
 * </UL>
 * <LI>Standard bracketing () for ordering expression evaluation is supported.
 * <LI>Logical operators in precedence order: NOT, AND, OR
 * <LI>Comparison operators: =, >, >=, <, <=, <> (not equal)
 * <UL>
 * <LI>Only like type values can be compared. One exception is that it is valid to compare exact numeric values and
 * approximate numeric values (the type conversion required is defined by the rules of Java numeric promotion). If the
 * comparison of non-like type values is attempted, the selector is always false.
 * <LI>String and boolean comparison is restricted to = and <>. Two strings are equal if and only if they contain the
 * same sequence of characters.
 * </UL>
 * <LI>Arithmetic operators in precedence order:
 * <UL>
 * <LI>+, - unary
 * <LI>*, / multiplication and division
 * <LI>+, - addition and subtraction
 * <LI>Arithmetic operations on a NULL value are not supported; if they are attempted, the complete selector is always
 * false.
 * <LI>Arithmetic operations must use Java numeric promotion.
 * </UL>
 * <LI>arithmetic-expr1 [NOT] BETWEEN arithmetic-expr2 and arithmetic-expr3 comparison operator
 * <UL>
 * <LI>age BETWEEN 15 and 19 is equivalent to age >= 15 AND age <= 19
 * <LI>age NOT BETWEEN 15 and 19 is equivalent to age < 15 OR age > 19
 * <LI>If any of the exprs of a BETWEEN operation are NULL the value of the operation is false; if any of the exprs of a
 * NOT BETWEEN operation are NULL the value of the operation is true.
 * </UL>
 * <LI>identifier [NOT] IN (string-literal1, string-literal2,...) comparison operator where identifer has a String or
 * NULL value.
 * <UL>
 * <LI>Country IN (' UK', 'US', 'France') is true for `UK' and false for `Peru' it is equivalent to the expression
 * (Country = ' UK') OR (Country = ' US') OR (Country = ' France')
 * <LI>Country NOT IN (' UK', 'US', 'France') is false for `UK' and true for `Peru' it is equivalent to the expression
 * NOT ((Country = ' UK') OR (Country = ' US') OR (Country = ' France'))
 * <LI>If identifier of an IN or NOT IN operation is NULL the value of the operation is unknown.
 * </UL>
 * <LI>identifier [NOT] LIKE pattern-value [ESCAPE escape-character] comparison operator, where identifier has a String
 * value; pattern-value is a string literal where `_' stands for any single character; `%' stands for any sequence of
 * characters (including the empty sequence); and all other characters stand for themselves. The optional
 * escape-character is a single character string literal whose character is used to escape the special meaning of the
 * `_' and `%' in pattern-value.
 * <UL>
 * <LI>phone LIKE `12%3' is true for `123' `12993' and false for `1234'
 * <LI>word LIKE `l_se' is true for `lose' and false for `loose'
 * <LI>underscored LIKE `\_%' ESCAPE `\' is true for `_foo' and false for `bar'
 * <LI>phone NOT LIKE `12%3' is false for `123' `12993' and true for `1234'
 * <LI>If identifier of a LIKE or NOT LIKE operation is NULL the value of the operation is unknown.
 * </UL>
 * <LI>identifier IS NULL comparison operator tests for a null header field value, or a missing property value.
 * <UL>
 * <LI>prop_name IS NULL
 * </UL>
 * <LI>identifier IS NOT NULL comparison operator tests for the existence of a non null header field value or a property
 * value.
 * <UL>
 * <LI>prop_name IS NOT NULL
 * </UL>
 *
 * <P>
 * JMS providers are required to verify the syntactic correctness of a message selector at the time it is presented. A
 * method providing a syntactically incorrect selector must result in a JMSException.
 *
 * <P>
 * The following message selector selects messages with a message type of car and color of blue and weight greater than
 * 2500 lbs:
 *
 * <P>
 * "JMSType = `car' AND color = `blue' AND weight > 2500"
 *
 * <P>
 * As noted above, property values may be NULL. The evaluation of selector expressions containing NULL values is defined
 * by SQL 92 NULL semantics. A brief description of these semantics is provided here.
 *
 * <P>
 * SQL treats a NULL value as unknown. Comparison or arithmetic with an unknown value always yields an unknown value.
 *
 * <P>
 * The IS NULL and IS NOT NULL operators convert an unknown value into the respective TRUE and FALSE values.
 *
 * <P>
 * The boolean operators use three valued logic as defined by the following tables:
 *
 * <P>
 * The definition of the AND operator
 *
 * <PRE>
 * | AND  |   T   |   F   |   U
 * +------+-------+-------+-------
 * |  T   |   T   |   F   |   U
 * |  F   |   F   |   F   |   F
 * |  U   |   U   |   F   |   U
 * +------+-------+-------+-------
 * </PRE>
 *
 * <P>
 * The definition of the OR operator
 *
 * <PRE>
 * | OR   |   T   |   F   |   U
 * +------+-------+-------+--------
 * |  T   |   T   |   T   |   T
 * |  F   |   T   |   F   |   U
 * |  U   |   T   |   U   |   U
 * +------+-------+-------+-------
 * </PRE>
 *
 * <P>
 * The definition of the NOT operator
 *
 * <PRE>
 * | NOT
 * +------+------
 * |  T   |   F
 * |  F   |   T
 * |  U   |   U
 * +------+-------
 * </PRE>
 *
 * <P>
 * When used in a message selector JMSDeliveryMode is treated as having the values `PERSISTENT' and `NON_PERSISTENT'.
 *
 * <P>
 * Although SQL supports fixed decimal comparison and arithmetic, JMS message selectors do not. This is the reason for
 * restricting exact numeric literals to those without a decimal (and the addition of numerics with a decimal as an
 * alternate representation for an approximate numeric values).
 *
 * <P>
 * SQL comments are not supported.
 *
 * @see javax.jms.MessageConsumer#receive()
 * @see javax.jms.MessageConsumer#receive(long)
 * @see javax.jms.MessageConsumer#receiveNoWait()
 * @see javax.jms.MessageListener#onMessage(Message)
 * @see javax.jms.BytesMessage
 * @see javax.jms.MapMessage
 * @see javax.jms.ObjectMessage
 * @see javax.jms.StreamMessage
 * @see javax.jms.TextMessage
 */

public class MessageImpl implements javax.jms.Message, com.sun.messaging.jms.Message, Traceable {

    public static final String UTF8 = "UTF8";

    protected Hashtable properties = null;
    protected ReadWritePacket pkt = null;

    // This value is set to true when message is received. This is done in
    // ProtocolHandler.getJMSMessage()
    protected boolean readMode = false;
    protected boolean propReadMode = false;

    // session impl reference - for message.acknowledge()
    protected SessionImpl session = null;

    // messageID for acknowlwdge, the value is set when message is received.
    protected SysMessageID messageID = null;

    // interest ID for acknowledgement
    // XXX PROTOCOL2.1
    protected long interestID = 0;

    // variable for client acknowledge mode
    protected boolean isOnAckList = false;

    // flag to indicate if this message is received from QueueBrowser
    // BrowserConsumer set this flag to true before return a message
    // from Enumeration.nextElement() API.
    // Msg.acknowledge() does no op if this flag is set to true.
    protected boolean isQBrowserMsg = false;

    // variable to indicate if this message is valid for acknowledge
    // Default is true. Set to false if we do not want this message
    // to be acknowledged. Such as for messages consumed by consumer
    // that is closed.
    protected boolean doAcknowledge = true;
    protected boolean consumerInRA = false;

    // message destination
    protected Destination destination = null;

    // JMSReplyTo
    protected Destination replyTo = null;

    // Indicates API user has set JMSMessageID - used to disable "ID:" prefix
    protected boolean jmsMessageIDSet = false;

    // Used to store API user modified JMSMessageID
    protected String jmsMessageID = null;

    protected boolean shouldCompress = false;

    protected int clientRetries = 0;

    public static final String JMS_SUN_COMPRESS = "JMS_SUN_COMPRESS";

    // public static final String JMS_SUN_COMPRESS_LEVEL = "JMS_SUN_COMPRESS_LEVEL";

    // public static final String JMS_SUN_COMPRESS_STRATEGY = "JMS_SUN_COMPRESS_STRATEGY";

    // public static final String JMS_SUN_COMPRESS_NOWRAP = "JMS_SUN_COMPRESS_NOWRAP";

    public static final String JMS_SUN_UNCOMPRESSED_SIZE = "JMS_SUN_UNCOMPRESSED_SIZE";

    public static final String JMS_SUN_COMPRESSED_SIZE = "JMS_SUN_COMPRESSED_SIZE";

    /*
     * When message.acknowledge() is called we need to have a reference of session so that we can use session.acknowledge()
     * to ack to the broker
     */
    protected void setSession(SessionImpl session) {
        this.session = session;

        // set JMSXConsumerTXID if needed
        if (session.setJMSXConsumerTXID) {
            if (session.transaction != null) {
                if (properties == null) {
                    properties = new Hashtable();
                }
                // Set the property
                properties.put(ConnectionMetaDataImpl.JMSXConsumerTXID, String.valueOf(session.transaction.getTransactionID()));
            }
        }

    }

    /*
     * Used by the RA to suspend delivery when shutting down an endpoint
     */
    public SessionImpl _getSession() {
        return session;
    }

    protected void setPacket(ReadWritePacket pkt) {
        this.pkt = pkt;
    }

    protected ReadWritePacket getPacket() {
        return pkt;
    }

    protected void setMessageBodyToPacket() throws JMSException {
        // do nothing, over written by subclasses
    }

    protected void getMessageBodyFromPacket() throws JMSException {
        // do nothing, over written by subclasses
    }

    protected void setPropertiesToPacket() throws JMSException {
        try {
            pkt.setProperties(properties);
        } catch (Exception e) {
            ExceptionHandler.handleException(e, AdministeredObject.cr.X_PACKET_SET_PROPERTIES, true);
        }
    }

    protected void getPropertiesFromPacket() throws JMSException {
        try {
            properties = pkt.getProperties();
        } catch (Exception e) {
            ExceptionHandler.handleException(e, AdministeredObject.cr.X_PACKET_GET_PROPERTIES, true);
        }
    }

    // called by sub classes
    protected void setMessageBody(byte[] messageBody) {
        pkt.setMessageBody(messageBody);
    }

    protected InputStream getMessageBodyStream() {
        return pkt.getMessageBodyStream();
    }

    protected byte[] getMessageBody() throws JMSException {

        if (pkt.getFlag(PacketFlag.Z_FLAG)) {
            this.decompress();
        }

        return pkt.getMessageBody();
    }

    /**
     * compress message body. This is called from ProtocolHandler.writeJMSMessage() method.
     *
     * NOTE: This code is duplicated from DirectPakcet.compress(). Any changes to either method should be made to both in
     * order to keep them in sync.
     *
     * @throws JMSException if cannot compress the message.
     */
    protected void compress() throws JMSException {

        try {
            /**
             * get unzip body bytes.
             */
            byte[] body = pkt.getMessageBody();
            int offset = pkt.getMessageBodyOffset();
            int unzipSize = pkt.getMessageBodyLength();

            /**
             * no compression if no body.
             */
            if (body == null) {
                setProperty(MessageImpl.JMS_SUN_UNCOMPRESSED_SIZE, Integer.valueOf(0));
                setProperty(MessageImpl.JMS_SUN_COMPRESSED_SIZE, Integer.valueOf(0));
                return;
            }

            /**
             * byte array for the ziped body
             */
            JMQByteArrayOutputStream baos = new JMQByteArrayOutputStream(new byte[32]);

            // get a compressor instance.
            Compressor compressor = Compressor.getInstance();

            // compress body into baos.
            compressor.compress(body, offset, unzipSize, baos);

            baos.flush();

            // get zipped body and size
            byte[] zipbody = baos.getBuf();
            int zipSize = baos.getCount();

            baos.close();

            // set zipped body into pkt.
            pkt.setMessageBody(zipbody, 0, zipSize);

            // set unzip size prop.
            setProperty(MessageImpl.JMS_SUN_UNCOMPRESSED_SIZE, Integer.valueOf(unzipSize));
            // set zip size prop.
            setProperty(MessageImpl.JMS_SUN_COMPRESSED_SIZE, Integer.valueOf(zipSize));

            // set zip flag to true.
            pkt.setFlag(PacketFlag.Z_FLAG, true);

        } catch (Exception ioe) {
            ioe.printStackTrace();

            JMSException jmse = new JMSException(ioe.toString());
            jmse.setLinkedException(ioe);

            ExceptionHandler.throwJMSException(jmse);
        }
    }

    /**
     * decompress the message body. This methid is called from getMessageBody() above.
     *
     * NOTE: This code is duplicated from DirectPakcet.decompress(). Any changes to either method should be made to both in
     * order to keep them in sync.
     *
     * @throws JMSException if unable to decompress the message body.
     */
    protected void decompress() throws JMSException {
        // get a decompressor instance.
        Decompressor decomp = Decompressor.getInstance();

        // get ziped body.
        byte[] zipBody = pkt.getMessageBody();

        // get unziped size
        int unzipSize = getIntProperty(MessageImpl.JMS_SUN_UNCOMPRESSED_SIZE);

        // byte[] to hold unzip body
        byte[] unzipBody = new byte[unzipSize];

        // decompress zip body into unzip body
        decomp.decompress(zipBody, unzipBody);

        // set unzip body into packet
        pkt.setMessageBody(unzipBody, 0, unzipSize);

        // set z flag to false.
        pkt.setFlag(PacketFlag.Z_FLAG, false);

        // init shouldCompress flag to true -- for the case that same message
        // is sent without calling clear properties.
        shouldCompress = true;
    }

    /**
     * Verify that the specified property name is allowed
     *
     * @param name
     * @throws JMSException
     */
    protected static void checkValidPropertyName(String name) throws JMSException {

        // The following are reserved words
        if ("NULL".equalsIgnoreCase(name) || "TRUE".equalsIgnoreCase(name) || "FALSE".equalsIgnoreCase(name) || "NOT".equalsIgnoreCase(name)
                || "AND".equalsIgnoreCase(name) || "OR".equalsIgnoreCase(name) || "BETWEEN".equalsIgnoreCase(name) || "LIKE".equalsIgnoreCase(name)
                || "IN".equalsIgnoreCase(name) || "IS".equalsIgnoreCase(name)) {

            // Throw JMSException indicating a reserved word was used as the
            // property name
            String errorString = AdministeredObject.cr.getKString(AdministeredObject.cr.X_PROPERTYNAME_RESERVED, name);
            JMSException jmse = new JMSException(errorString, AdministeredObject.cr.X_PROPERTYNAME_RESERVED);

            ExceptionHandler.throwJMSException(jmse);
        }

        // Verify identifier start character and part
        char[] namechars = name.toCharArray();
        if (Character.isJavaIdentifierStart(namechars[0])) {
            for (int i = 1; i < namechars.length; i++) {
                if (!Character.isJavaIdentifierPart(namechars[i])) {
                    // Throw JMSException indicating a bad character
                    // was used as part of the property name
                    String errorString = AdministeredObject.cr.getKString(AdministeredObject.cr.X_BAD_PROPERTY_PARTCHAR, String.valueOf(namechars[i]), name);

                    JMSException jmse = new JMSException(errorString, AdministeredObject.cr.X_BAD_PROPERTY_PARTCHAR);
                    ExceptionHandler.throwJMSException(jmse);
                }
            }
        } else {
            // Throw JMSException indicating an illegal start character was used
            // for the property name
            String errorString = AdministeredObject.cr.getKString(AdministeredObject.cr.X_BAD_PROPERTY_STARTCHAR, String.valueOf(namechars[0]), name);
            JMSException jmse = new JMSException(errorString, AdministeredObject.cr.X_BAD_PROPERTY_STARTCHAR);
            ExceptionHandler.throwJMSException(jmse);
        }
        // The property name is valid
    }

    protected void checkAndSetProperty(String name, Object value) throws JMSException {

        // Verify that the specified property name is not null and is not an
        // empty
        checkPropertyNameSet(name);

        // Verify properties are writeable
        if (propReadMode) {
            String errorString = AdministeredObject.cr.getKString(ClientResources.X_MESSAGE_WRITE);
            JMSException jmse = new MessageNotWriteableException(errorString, ClientResources.X_MESSAGE_WRITE);
            ExceptionHandler.throwJMSException(jmse);
        }

        // Verify that the specified value is a valid message property value
        checkValidPropertyValue(name, value);

        // Verify that the specified property name is allowed
        checkValidPropertyName(name);

        // now set the property
        setProperty(name, value);
    }

    /**
     * Verify that the specified property name is not null and is not an empty String
     *
     * @param name
     */
    protected static void checkPropertyNameSet(String name) {
        if (name == null || "".equals(name)) {
            String errorString = AdministeredObject.cr.getKString(ClientResources.X_BAD_PROPERTY_NAME);
            throw new IllegalArgumentException(errorString);
        }
    }

    /**
     * Verify that the specified value is a valid message property value
     *
     * @param name
     * @param value
     * @throws JMSException
     */
    protected static void checkValidPropertyValue(String name, Object value) throws JMSException {
        if (value instanceof Boolean || value instanceof Byte || value instanceof Short || value instanceof Integer || value instanceof Long
                || value instanceof Float || value instanceof Double || value instanceof String) {
            // This is OK
        } else {
            String errorString = AdministeredObject.cr.getKString(ClientResources.X_BAD_PROPERTY_OBJECT_TYPE,
                    (value == null ? "null" : value.getClass().getName()), name);
            JMSException jmse = new com.sun.messaging.jms.MessageFormatException(errorString, ClientResources.X_BAD_PROPERTY_OBJECT_TYPE);
            ExceptionHandler.throwJMSException(jmse);
        }
    }

    /**
     * set message property.
     *
     * @param name
     * @param value
     */
    private void setProperty(String name, Object value) {

        if (properties == null) {
            properties = new Hashtable();
        }

        // Set the property
        properties.put(name, value);
    }

    protected void checkMessageAccess() throws JMSException {
        if (readMode) {
            String errorString = AdministeredObject.cr.getKString(AdministeredObject.cr.X_MESSAGE_READ_ONLY);

            JMSException jmse = new MessageNotWriteableException(errorString, AdministeredObject.cr.X_MESSAGE_READ_ONLY);

            ExceptionHandler.throwJMSException(jmse);
        }
    }

    protected void checkReadAccess() throws JMSException {
        if (!readMode) {
            String errorString = AdministeredObject.cr.getKString(AdministeredObject.cr.X_MESSAGE_WRITE_ONLY);

            JMSException jmse = new MessageNotReadableException(errorString, AdministeredObject.cr.X_MESSAGE_WRITE_ONLY);
            ExceptionHandler.throwJMSException(jmse);
        }
    }

    protected void setMessageReadMode(boolean state) {
        readMode = state;
    }

    protected void setPropertiesReadMode(boolean state) {
        propReadMode = state;
    }

    protected void setIsOnAckList(boolean state) {
        isOnAckList = state;
    }

    protected boolean getIsOnAckList() {
        return isOnAckList;
    }

    protected MessageImpl() throws JMSException {
        init();
    }

    /**
     * A seperate copy is required to prevent overwritten when message is written out before do ack.
     *
     * Set by ProtocolHandler.getJMSMessage() method.
     */
    protected void setMessageID(SysMessageID mID) {
        this.messageID = (SysMessageID) mID.clone();
    }

    /**
     * Get the message ID of this message.
     */
    protected SysMessageID getMessageID() {
        return messageID;
    }

    /**
     * Get the interestID/consumerID of this message
     */
    // XXX PROTOCOL2.1
    protected long getInterestID() {
        return interestID;
    }

    /**
     * Set interest ID.
     *
     * This value is set when message is received. It is set by ProtocolHandler.getJMSMessage()
     */
    // XXX PROTOCOL2.1
    protected void setInterestID(long id) {
        interestID = id;
    }

    /**
     * Get JMQ provided destination. If exception is thrown during getJMSDestination/getJMSReplyTo this method is called to
     * construct JMQ default destination.
     */
    protected Destination getJMQDestination(String destName) throws JMSException {
        // construct destination obj based on bits set in the pkt
        Destination dest = null;

        boolean isQ = pkt.getIsQueue();

        if (destName.startsWith(ClientConstants.TEMPORARY_DESTINATION_URI_PREFIX + ClientConstants.TEMPORARY_QUEUE_URI_NAME)) {
            dest = new TemporaryQueueImpl(destName);
        } else {
            if (destName.startsWith(ClientConstants.TEMPORARY_DESTINATION_URI_PREFIX + ClientConstants.TEMPORARY_TOPIC_URI_NAME)) {
                dest = new TemporaryTopicImpl(destName);
            } else {
                if (isQ) {
                    dest = new com.sun.messaging.BasicQueue(destName);
                } else {
                    dest = new com.sun.messaging.BasicTopic(destName);
                }
            }
        }
        return dest;
    }

    private void init() throws JMSException {

        pkt = new ReadWritePacket();
        setJMSDeliveryMode(DeliveryMode.PERSISTENT); // default
        setJMSPriority(4); // default
        setJMSExpiration(0L); // default
        setJMSDeliveryTime(0L); // default

        // default message type
        setPacketType(PacketType.MESSAGE);
    }

    protected void setPacketType(int type) {
        pkt.setPacketType(type);
    }

    /**
     * Get send on acknowledge flag. If this flag is set, the producer is not returned until confirmation is received. This
     * is used for testing purpose only.
     */
    public boolean getSendAcknowledge() {
        return pkt.getSendAcknowledge();
    }

    /**
     * Get the message ID.
     *
     * <P>
     * The messageID header field contains a value that uniquely identifies each message sent by a provider.
     *
     * <P>
     * When a message is sent, messageID can be ignored. When the send method returns it contains a provider-assigned value.
     *
     * <P>
     * A JMSMessageID is a String value which should function as a unique key for identifying messages in a historical
     * repository. The exact scope of uniqueness is provider defined. It should at least cover all messages for a specific
     * installation of a provider where an installation is some connected set of message routers.
     *
     * <P>
     * All JMSMessageID values must start with the prefix `ID:'. Uniqueness of message ID values across different providers
     * is not required.
     *
     * <P>
     * Since message ID's take some effort to create and increase a message's size, some JMS providers may be able to
     * optimize message overhead if they are given a hint that message ID is not used by an application. JMS message
     * Producers provide a hint to disable message ID. When a client sets a Producer to disable message ID they are saying
     * that they do not depend on the value of message ID for the messages it produces. These messages must either have
     * message ID set to null or, if the hint is ignored, messageID must be set to its normal unique value.
     *
     * @return the message ID
     *
     * @exception JMSException if JMS fails to get the message Id due to internal JMS error.
     * @see javax.jms.Message#setJMSMessageID(String)
     */

    @Override
    public String getJMSMessageID() throws JMSException {
        if (jmsMessageIDSet) {
            return jmsMessageID;
        } else {
            return "ID:" + pkt.getMessageID();
        }
    }

    /**
     * Set the message ID.
     *
     * <P>
     * Providers set this field when a message is sent. This operation can be used to change the value of a message that's
     * been received. Note: that this field can be set to null and in that case a null will be returned from
     * getJMSMessageID() - perfectly valid.
     *
     * @param id the ID of the message
     *
     * @exception JMSException if JMS fails to set the message Id due to internal JMS error.
     *
     * @see javax.jms.Message#getJMSMessageID()
     */

    @Override
    public void setJMSMessageID(String id) throws JMSException {
        jmsMessageID = id;
        jmsMessageIDSet = true;
    }

    /**
     * Reset the message ID
     *
     * Used when the message is produced to revert the JMSmessageID back to the `produced' state.
     *
     */
    public void resetJMSMessageID() {
        jmsMessageIDSet = false;
    }

    /**
     * Get the message timestamp.
     *
     * <P>
     * The JMSTimestamp header field contains the time a message was handed off to a provider to be sent. It is not the time
     * the message was actually transmitted because the actual send may occur later due to transactions or other client side
     * queueing of messages.
     *
     * <P>
     * When a message is sent, JMSTimestamp is ignored. When the send method returns it contains a a time value somewhere in
     * the interval between the call and the return. It is in the format of a normal Java millis time value.
     *
     * <P>
     * Since timestamps take some effort to create and increase a message's size, some JMS providers may be able to optimize
     * message overhead if they are given a hint that timestamp is not used by an application. JMS message Producers provide
     * a hint to disable timestamps. When a client sets a producer to disable timestamps they are saying that they do not
     * depend on the value of timestamp for the messages it produces. These messages must either have timestamp set to null
     * or, if the hint is ignored, timestamp must be set to its normal value.
     *
     * @return the message timestamp
     *
     * @exception JMSException if JMS fails to get the Timestamp due to internal JMS error.
     *
     * @see javax.jms.Message#setJMSTimestamp(long)
     */

    @Override
    public long getJMSTimestamp() throws JMSException {
        return pkt.getTimestamp();
    }

    /**
     * Set the message timestamp.
     *
     * <P>
     * Providers set this field when a message is sent. This operation can be used to change the value of a message that's
     * been received.
     *
     * @param timestamp the timestamp for this message
     *
     * @exception JMSException if JMS fails to set the timestamp due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSTimestamp()
     */

    @Override
    public void setJMSTimestamp(long timestamp) throws JMSException {
        pkt.setTimestamp(timestamp);
    }

    /**
     * Get the correlation ID as an array of bytes for the message.
     *
     * <P>
     * The use of a byte[] value for JMSCorrelationID is non-portable.
     *
     * @return the correlation ID of a message as an array of bytes.
     *
     * @exception JMSException if JMS fails to get correlationId due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSCorrelationID(String)
     * @see javax.jms.Message#getJMSCorrelationID()
     * @see javax.jms.Message#setJMSCorrelationIDAsBytes(byte[])
     */

    @Override
    public byte[] getJMSCorrelationIDAsBytes() throws JMSException {

        byte[] ret = null;
        try {
            ret = pkt.getCorrelationID().getBytes(UTF8);
        } catch (Exception e) {
            ExceptionHandler.handleException(e, AdministeredObject.cr.X_CAUGHT_EXCEPTION);
        }

        return ret;
    }

    /**
     * Set the correlation ID as an array of bytes for the message.
     *
     * <P>
     * The array is copied before the method returns, so future modifications to the array will not alter this message
     * header.
     *
     * <P>
     * If a provider supports the native concept of correlation id, a JMS client may need to assign specific
     * JMSCorrelationID values to match those expected by non-JMS clients. JMS providers without native correlation id
     * values are not required to support this (and the corresponding get) method; their implementation may throw
     * java.lang.UnsupportedOperationException).
     *
     * <P>
     * The use of a byte[] value for JMSCorrelationID is non-portable.
     *
     * @param correlationID the correlation ID value as an array of bytes.
     *
     * @exception JMSException if JMS fails to set correlationId due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSCorrelationID(String)
     * @see javax.jms.Message#getJMSCorrelationID()
     * @see javax.jms.Message#getJMSCorrelationIDAsBytes()
     */

    @Override
    public void setJMSCorrelationIDAsBytes(byte[] correlationID) throws JMSException {
        try {
            String id = new String(correlationID, UTF8);
            pkt.setCorrelationID(id);
        } catch (Exception e) {
            ExceptionHandler.handleException(e, AdministeredObject.cr.X_CAUGHT_EXCEPTION);
        }
    }

    /**
     * Set the correlation ID for the message.
     *
     * <P>
     * A client can use the JMSCorrelationID header field to link one message with another. A typically use is to link a
     * response message with its request message.
     *
     * <P>
     * JMSCorrelationID can hold one of the following:
     * <UL>
     * <LI>A provider-specific message ID
     * <LI>An application-specific String
     * <LI>A provider-native byte[] value.
     * </UL>
     *
     * <P>
     * Since each message sent by a JMS provider is assigned a message ID value it is convenient to link messages via
     * message ID. All message ID values must start with the `ID:' prefix.
     *
     * <P>
     * In some cases, an application (made up of several clients) needs to use an application specific value for linking
     * messages. For instance, an application may use JMSCorrelationID to hold a value referencing some external
     * information. Application specified values must not start with the `ID:' prefix; this is reserved for
     * provider-generated message ID values.
     *
     * <P>
     * If a provider supports the native concept of correlation ID, a JMS client may need to assign specific
     * JMSCorrelationID values to match those expected by non-JMS clients. A byte[] value is used for this purpose. JMS
     * providers without native correlation ID values are not required to support byte[] values. The use of a byte[] value
     * for JMSCorrelationID is non-portable.
     *
     * @param correlationID the message ID of a message being referred to.
     *
     * @exception JMSException if JMS fails to set correlationId due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSCorrelationID()
     * @see javax.jms.Message#getJMSCorrelationIDAsBytes()
     * @see javax.jms.Message#setJMSCorrelationIDAsBytes(byte[])
     */

    @Override
    public void setJMSCorrelationID(String correlationID) throws JMSException {
        pkt.setCorrelationID(correlationID);
    }

    /**
     * Get the correlation ID for the message.
     *
     * <P>
     * This method is used to return correlation id values that are either provider-specific message ID's or
     * application-specific Strings.
     *
     * @return the correlation ID of a message as a String.
     *
     * @exception JMSException if JMS fails to get correlationId due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSCorrelationID(String)
     * @see javax.jms.Message#getJMSCorrelationIDAsBytes()
     * @see javax.jms.Message#setJMSCorrelationIDAsBytes(byte[])
     */

    @Override
    public String getJMSCorrelationID() throws JMSException {
        return pkt.getCorrelationID();
    }

    /**
     * Get where a reply to this message should be sent.
     *
     * @return where to send a response to this message
     *
     * @exception JMSException if JMS fails to get ReplyTo Destination due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSReplyTo(Destination)
     */
    @Override
    public Destination getJMSReplyTo() throws JMSException {

        String destName = null;
        String className = null;

        if (replyTo == null) {
            // we only construct new reply to when it is a received msg
            if (messageID != null) {
                // if not set, just return null
                if (pkt.getReplyTo() == null) {
                    return null;
                }
                // construct dest obj based on bits set in the pkt
                try {
                    destName = pkt.getReplyTo();
                    className = pkt.getReplyToClass();
                    // instantiate replyTo destination obj
                    replyTo = (com.sun.messaging.Destination) Class.forName(className).newInstance();
                    // set destination name
                    ((com.sun.messaging.Destination) replyTo).setProperty(DestinationConfiguration.imqDestinationName, destName);
                } catch (Exception e) {
                    // e.printStackTrace();
                    // if there is a problem, we create a default one
                    replyTo = getJMQDestination(destName);
                }
            }
        }

        return replyTo;
    }

    /**
     * Set where a reply to this message should be sent.
     *
     * <P>
     * The replyTo header field contains the destination where a reply to the current message should be sent. If it is null
     * no reply is expected. The destination may be either a Queue or a Topic.
     *
     * <P>
     * Messages with a null replyTo value are called JMS datagrams. Datagrams may be a notification of some change in the
     * sender (i.e. they signal a sender event) or they may just be some data the sender thinks is of interest.
     *
     * Messages with a replyTo value are typically expecting a response. A response may be optional, it is up to the client
     * to decide. These messages are called JMS requests. A message sent in response to a request is called a reply.
     *
     * In some cases a client may wish to match up a request it sent earlier with a reply it has just received. This can be
     * done using the correlationID.
     *
     * @param replyTo where to send a response to this message
     *
     * @exception JMSException if JMS fails to set ReplyTo Destination due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSReplyTo()
     */

    @Override
    public void setJMSReplyTo(Destination replyTo) throws JMSException {
        this.replyTo = replyTo;

        // com.sun.messaging.Destination dest =
        // (com.sun.messaging.Destination)replyTo;
        // pkt.setReplyTo( dest.getName() );
        // pkt.setIsQueue( dest.isQueue() );
    }

    /**
     * Get the destination for this message.
     *
     * <P>
     * The destination field contains the destination to which the message is being sent.
     *
     * <P>
     * When a message is sent this value is ignored. After completion of the send method it holds the destination specified
     * by the send.
     *
     * <P>
     * When a message is received, its destination value must be equivalent to the value assigned when it was sent.
     *
     * @return the destination of this message.
     *
     * @exception JMSException if JMS fails to get JMS Destination due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSDestination(Destination)
     */

    @Override
    public Destination getJMSDestination() throws JMSException {
        String destName = null;
        String className = null;

        if (destination == null) {
            // if (destination == null && messageID != null),
            // this is a received message.
            // we need to construct the dest object if this is a received
            // message and when accessed for the first time.
            if (messageID != null) {
                try {
                    destName = pkt.getDestination();
                    className = pkt.getDestinationClass();
                    // instantiate destination object
                    destination = (com.sun.messaging.Destination) Class.forName(className).newInstance();
                    // set destination name
                    ((com.sun.messaging.Destination) destination).setProperty(DestinationConfiguration.imqDestinationName, destName);
                } catch (Exception e) {
                    // e.printStackTrace();
                    // if there is a problem, we create a default one
                    destination = getJMQDestination(destName);
                }
            }
        }

        return destination;
    }

    /**
     * Set the destination for this message.
     *
     * <P>
     * Providers set this field when a message is sent. This operation can be used to change the value of a message that's
     * been received.
     *
     * @param destination the destination for this message.
     *
     * @exception JMSException if JMS fails to set JMS Destination due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSDestination()
     */

    @Override
    public void setJMSDestination(Destination destination) throws JMSException {
        this.destination = destination;
    }

    /**
     * Get the delivery mode for this message.
     *
     * @return the delivery mode of this message.
     *
     * @exception JMSException if JMS fails to get JMS DeliveryMode due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSDeliveryMode(int)
     * @see javax.jms.DeliveryMode
     */

    @Override
    public int getJMSDeliveryMode() throws JMSException {
        if (pkt.getPersistent()) {
            return DeliveryMode.PERSISTENT;
        } else {
            return DeliveryMode.NON_PERSISTENT;
        }
    }

    /**
     * Set the delivery mode for this message.
     *
     * <P>
     * Providers set this field when a message is sent. This operation can be used to change the value of a message that's
     * been received.
     *
     * @param deliveryMode the delivery mode for this message.
     *
     * @exception JMSException if JMS fails to set JMS DeliveryMode due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSDeliveryMode()
     * @see javax.jms.DeliveryMode
     */

    @Override
    public void setJMSDeliveryMode(int deliveryMode) throws JMSException {

        if (deliveryMode != DeliveryMode.NON_PERSISTENT && deliveryMode != DeliveryMode.PERSISTENT) {

            String errorString = AdministeredObject.cr.getKString(AdministeredObject.cr.X_INVALID_DELIVERY_PARAM, "DeliveryMode", String.valueOf(deliveryMode));

            JMSException jmse = new JMSException(errorString, AdministeredObject.cr.X_INVALID_DELIVERY_PARAM);

            ExceptionHandler.throwJMSException(jmse);
        }

        if (deliveryMode == DeliveryMode.PERSISTENT) {
            pkt.setPersistent(true);
        } else {
            pkt.setPersistent(false);
        }
    }

    /**
     * Get an indication of whether this message is being redelivered.
     *
     * <P>
     * If a client receives a message with the redelivered indicator set, it is likely, but not guaranteed, that this
     * message was delivered to the client earlier but the client did not acknowledge its receipt at that earlier time.
     *
     * @return set to true if this message is being redelivered.
     *
     * @exception JMSException if JMS fails to get JMS Redelivered flag due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSRedelivered(boolean)
     */

    @Override
    public boolean getJMSRedelivered() throws JMSException {
        return pkt.getRedelivered();
    }

    /**
     * Set to indicate whether this message is being redelivered.
     *
     * <P>
     * This field is set at the time the message is delivered. This operation can be used to change the value of a message
     * that's been received.
     *
     * @param redelivered an indication of whether this message is being redelivered.
     *
     * @exception JMSException if JMS fails to set JMS Redelivered flag due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSRedelivered()
     */

    @Override
    public void setJMSRedelivered(boolean redelivered) throws JMSException {
        pkt.setRedelivered(redelivered);
    }

    /**
     * Get the message type.
     *
     * @return the message type
     *
     * @exception JMSException if JMS fails to get JMS message type due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSType(String)
     */

    @Override
    public String getJMSType() throws JMSException {
        return pkt.getMessageType();
    }

    /**
     * Set the message type.
     *
     * <P>
     * Some JMS providers use a message repository that contains the definition of messages sent by applications. The type
     * header field contains the name of a message's definition.
     *
     * <P>
     * JMS does not define a standard message definition repository nor does it define a naming policy for the definitions
     * it contains. JMS clients should use symbolic values for type that can be configured at installation time to the
     * values defined in the current providers message repository.
     *
     * <P>
     * JMS clients should assign a value to type whether the application makes use of it or not. This insures that it is
     * properly set for those providers that require it.
     *
     * @param type the class of message
     *
     * @exception JMSException if JMS fails to set JMS message type due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSType()
     */

    @Override
    public void setJMSType(String type) throws JMSException {
        pkt.setMessageType(type);
    }

    /**
     * Get the message's expiration value.
     *
     * <P>
     * When a message is sent, expiration is left unassigned. After completion of the send method, it holds the expiration
     * time of the message. This is the sum of the time-to-live value specified by the client and the GMT at the time of the
     * send.
     *
     * <P>
     * If the time-to-live is specified as zero, expiration is set to zero which indicates the message does not expire.
     *
     * <P>
     * When a message's expiration time is reached, a provider should discard it. JMS does not define any form of
     * notification of message expiration.
     *
     * <P>
     * Clients should not receive messages that have expired; however, JMS does not guarantee that this will not happen.
     *
     * @return the time the message expires. It is the sum of the time-to-live value specified by the client, and the GMT at
     * the time of the send.
     *
     * @exception JMSException if JMS fails to get JMS message expiration due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSExpiration(long)
     */

    @Override
    public long getJMSExpiration() throws JMSException {
        return pkt.getExpiration();
    }

    /**
     * Set the message's expiration value.
     *
     * <P>
     * Providers set this field when a message is sent. This operation can be used to change the value of a message that's
     * been received.
     *
     * @param expiration the message's expiration time
     *
     * @exception JMSException if JMS fails to set JMS message expiration due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSExpiration()
     */

    @Override
    public void setJMSExpiration(long expiration) throws JMSException {
        pkt.setExpiration(expiration);
    }

    /**
     * Gets the message's delivery time value.
     *
     * <P>
     * When a message is sent, the <CODE>JMSDeliveryTime</CODE> header field is left unassigned. After completion of the
     * <CODE>send</CODE> or <CODE>publish</CODE> method, it holds the delivery time of the message. This is the sum of the
     * deliveryDelay value specified by the client and the GMT at the time of the <CODE>send</CODE> or <CODE>publish</CODE>.
     *
     * <P>
     * A message's delivery time is the earliest time when a provider may make the message visible on the target destination
     * and available for delivery to consumers.
     *
     * <P>
     * Clients must not receive messages before the delivery time has been reached.
     *
     * @return the message's delivery time, which is the sum of the deliveryDelay value specified by the client and the GMT
     * at the time of the <CODE>send</CODE> or <CODE>publish</CODE>.
     *
     * @exception JMSException if the JMS provider fails to get the message expiration due to some internal error.
     *
     * @see javax.jms.Message#setJMSDeliveryTime(long)
     *
     * @since 2.0
     */
    @Override
    public long getJMSDeliveryTime() throws JMSException {
        return pkt.getDeliveryTime();
    }

    /**
     * Sets the message's delivery time value.
     *
     * <P>
     * This method is for use by JMS providers only to set this field when a message is sent. This message cannot be used by
     * clients to configure the delivery time of the message. This method is public to allow one JMS provider to set this
     * field when sending a message whose implementation is not its own.
     *
     * @param expiration the message's delivery time value
     *
     * @exception JMSException if the JMS provider fails to set the delivery time due to some internal error.
     *
     * @see javax.jms.Message#getJMSDeliveryTime()
     *
     * @since 2.0
     */
    @Override
    public void setJMSDeliveryTime(long deliveryTime) throws JMSException {
        pkt.setDeliveryTime(deliveryTime);
    }

    /**
     * Get the message priority.
     *
     * <P>
     * JMS defines a ten level priority value with 0 as the lowest priority and 9 as the highest. In addition, clients
     * should consider priorities 0-4 as gradations of normal priority and priorities 5-9 as gradations of expedited
     * priority.
     *
     * <P>
     * JMS does not require that a provider strictly implement priority ordering of messages; however, it should do its best
     * to deliver expedited messages ahead of normal messages.
     *
     * @return the default message priority
     *
     * @exception JMSException if JMS fails to get JMS message priority due to some internal JMS error.
     *
     * @see javax.jms.Message#setJMSPriority(int)
     */

    @Override
    public int getJMSPriority() throws JMSException {
        return pkt.getPriority();
    }

    /**
     * Set the priority for this message.
     *
     * <P>
     * Providers set this field when a message is sent. This operation can be used to change the value of a message that's
     * been received.
     *
     * @param priority the priority of this message
     *
     * @exception JMSException if JMS fails to set JMS message priority due to some internal JMS error.
     *
     * @see javax.jms.Message#getJMSPriority()
     */

    @Override
    public void setJMSPriority(int priority) throws JMSException {
        if (priority < 0 || priority > 9) {
            String errorString = AdministeredObject.cr.getKString(AdministeredObject.cr.X_INVALID_DELIVERY_PARAM, "DeliveryPriority", String.valueOf(priority));

            JMSException jmse = new JMSException(errorString, AdministeredObject.cr.X_INVALID_DELIVERY_PARAM);

            ExceptionHandler.throwJMSException(jmse);
        }
        pkt.setPriority(priority);
    }

    /**
     * Clear a message's properties. The message header fields and body are not cleared.
     *
     * @exception JMSException if JMS fails to clear JMS message properties due to some internal JMS error.
     */

    @Override
    public void clearProperties() throws JMSException {

        if (properties != null) {
            properties.clear();
        }

        setPropertiesReadMode(false);

        // set shouldCompress compress flag to false.
        shouldCompress = false;

    }

    /**
     * Check if a property value exists.
     *
     * @param name the name of the property to test
     *
     * @return true if the property does exist.
     *
     * @exception JMSException if JMS fails to check if property exists due to some internal JMS error.
     */

    @Override
    public boolean propertyExists(String name) throws JMSException {

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

        try {
            if (properties.containsKey(name)) {
                return true;
            } else {
                return false;
            }
        } catch (Exception e) {
            ExceptionHandler.handleException(e, AdministeredObject.cr.X_CAUGHT_EXCEPTION);
        }

        return false;
    }

    /**
     * Return the boolean property value with the given name.
     *
     * @param name the name of the boolean property
     *
     * @return the boolean property value with the given name.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public boolean getBooleanProperty(String name) throws JMSException {
        Object obj = null;
        if (properties != null) {
            obj = properties.get(name);
        }
        return ValueConvert.toBoolean(obj);
    }

    /**
     * Return the byte property value with the given name.
     *
     * @param name the name of the byte property
     *
     * @return the byte property value with the given name.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public byte getByteProperty(String name) throws JMSException {
        Object obj = null;
        if (properties != null) {
            obj = properties.get(name);
        }
        return ValueConvert.toByte(obj);
    }

    /**
     * Return the short property value with the given name.
     *
     * @param name the name of the short property
     *
     * @return the short property value with the given name.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public short getShortProperty(String name) throws JMSException {
        Object obj = null;
        if (properties != null) {
            obj = properties.get(name);
        }
        return ValueConvert.toShort(obj);
    }

    /**
     * Return the integer property value with the given name.
     *
     * @param name the name of the integer property
     *
     * @return the integer property value with the given name.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public int getIntProperty(String name) throws JMSException {
        Object obj = null;
        if (properties != null) {
            obj = properties.get(name);
        }
        return ValueConvert.toInt(obj);
    }

    /**
     * Return the long property value with the given name.
     *
     * @param name the name of the long property
     *
     * @return the long property value with the given name.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public long getLongProperty(String name) throws JMSException {
        Object obj = null;
        if (properties != null) {
            obj = properties.get(name);
        }
        return ValueConvert.toLong(obj);
    }

    /**
     * Return the float property value with the given name.
     *
     * @param name the name of the float property
     *
     * @return the float property value with the given name.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public float getFloatProperty(String name) throws JMSException {
        Object obj = null;
        if (properties != null) {
            obj = properties.get(name);
        }
        return ValueConvert.toFloat(obj);
    }

    /**
     * Return the double property value with the given name.
     *
     * @param name the name of the double property
     *
     * @return the double property value with the given name.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public double getDoubleProperty(String name) throws JMSException {
        Object obj = null;
        if (properties != null) {
            obj = properties.get(name);
        }
        return ValueConvert.toDouble(obj);
    }

    /**
     * Return the String property value with the given name.
     *
     * @param name the name of the String property
     *
     * @return the String property value with the given name. If there is no property by this name, a null value is
     * returned.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     * @exception MessageFormatException if this type conversion is invalid.
     */

    @Override
    public String getStringProperty(String name) throws JMSException {
        // only String and Object properties returns null if value doesn't exist
        Object obj;
        if (properties == null || (obj = properties.get(name)) == null) {
            return null;
        }
        return ValueConvert.toString(obj);
    }

    /**
     * Return the Java object property value with the given name.
     *
     * <P>
     * Note that this method can be used to return in objectified format, an object that had been stored as a property in
     * the Message with the equivalent <CODE>setObject</CODE> method call, or it's equivalent primitive set<type> method.
     *
     * @param name the name of the Java object property
     *
     * @return the Java object property value with the given name, in objectified format (ie. if it set as an int, then a
     * Integer is returned). If there is no property by this name, a null value is returned.
     *
     * @exception JMSException if JMS fails to get Property due to some internal JMS error.
     */

    @Override
    public Object getObjectProperty(String name) throws JMSException {
        // only String and Object properties returns null if value doesn't exist
        if (properties == null) {
            return null;
        }

        return properties.get(name);
    }

    /**
     * Return an Enumeration of all the property names.
     *
     * <P>
     * Note that JMS standard header fields are not considered properties and are not returned in this enumeration.
     *
     * @return an enumeration of all the names of property values.
     *
     * @exception JMSException if JMS fails to get Property names due to some internal JMS error.
     */

    @Override
    public Enumeration getPropertyNames() throws JMSException {
        /**
         * We should return an empty enumeration instead of throwing NULLPointerException if no properties exists.
         */
        if (properties == null) {
            properties = new Hashtable();
        }

        return properties.keys();
    }

    /**
     * Set a boolean property value with the given name, into the Message.
     *
     * @param name the name of the boolean property
     * @param value the boolean property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setBooleanProperty(String name, boolean value) throws JMSException {

        checkAndSetProperty(name, Boolean.valueOf(value));

        if (JMS_SUN_COMPRESS.equals(name)) {
            shouldCompress = value;
        }

    }

    /**
     * Set a byte property value with the given name, into the Message.
     *
     * @param name the name of the byte property
     * @param value the byte property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setByteProperty(String name, byte value) throws JMSException {
        checkAndSetProperty(name, Byte.valueOf(value));
    }

    /**
     * Set a short property value with the given name, into the Message.
     *
     * @param name the name of the short property
     * @param value the short property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setShortProperty(String name, short value) throws JMSException {
        checkAndSetProperty(name, Short.valueOf(value));
    }

    /**
     * Set an integer property value with the given name, into the Message.
     *
     * @param name the name of the integer property
     * @param value the integer property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setIntProperty(String name, int value) throws JMSException {
        checkAndSetProperty(name, Integer.valueOf(value));
    }

    /**
     * Set a long property value with the given name, into the Message.
     *
     * @param name the name of the long property
     * @param value the long property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setLongProperty(String name, long value) throws JMSException {
        checkAndSetProperty(name, Long.valueOf(value));
    }

    /**
     * Set a float property value with the given name, into the Message.
     *
     * @param name the name of the float property
     * @param value the float property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setFloatProperty(String name, float value) throws JMSException {
        checkAndSetProperty(name, Float.valueOf(value));
    }

    /**
     * Set a double property value with the given name, into the Message.
     *
     * @param name the name of the double property
     * @param value the double property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setDoubleProperty(String name, double value) throws JMSException {
        checkAndSetProperty(name, Double.valueOf(value));
    }

    /**
     * Set a String property value with the given name, into the Message.
     *
     * @param name the name of the String property
     * @param value the String property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setStringProperty(String name, String value) throws JMSException {
        checkAndSetProperty(name, value);
    }

    /**
     * Set a Java object property value with the given name, into the Message.
     *
     * <P>
     * Note that this method only works for the objectified primitive object types (Integer, Double, Long ...) and String's.
     *
     * @param name the name of the Java object property.
     * @param value the Java object property value to set in the Message.
     *
     * @exception JMSException if JMS fails to set Property due to some internal JMS error.
     * @exception MessageFormatException if object is invalid
     * @exception MessageNotWriteableException if properties are read-only
     */

    @Override
    public void setObjectProperty(String name, Object value) throws JMSException {
        checkAndSetProperty(name, value);
    }

    /**
     * Acknowledge this and all previous messages received.
     *
     * <P>
     * All JMS messages support the acknowledge() method for use when a client has specified that a JMS consumers messages
     * are to be explicitly acknowledged.
     *
     * <P>
     * JMS defaults to implicit message acknowledgement. In this mode, calls to acknowledge() are ignored.
     *
     * <P>
     * Acknowledgment of a message automatically acknowledges all messages previously received by the session. Clients may
     * individually acknowledge messages or they may choose to acknowledge messages in application defined groups (which is
     * done by acknowledging the last received message in the group).
     *
     * <P>
     * Messages that have been received but not acknowledged may be redelivered to the consumer.
     *
     * @exception JMSException if JMS fails to acknowledge due to some internal JMS error.
     * @exception IllegalStateException if this method is called on a closed session.
     */

    @Override
    public void acknowledge() throws JMSException {

        if (session != null) {
            if (session.acknowledgeMode == Session.CLIENT_ACKNOWLEDGE) {
                if (isQBrowserMsg == false) {
                    session.clientAcknowledge(this);
                }
            }
        }

    }

    /**
     * Acknowledge this message only.
     *
     * <P>
     * MQ messages support the acknowledgeThisMessage() method for use the client has specified that the session is
     * CLIENT_ACKNOWLEDGE
     *
     * @exception JMSException if JMS fails to acknowledge due to some internal JMS error.
     *
     * @exception IllegalStateException if this method is called on a closed session.
     */
    @Override
    public void acknowledgeThisMessage() throws JMSException {
        if (session != null && session.acknowledgeMode == Session.CLIENT_ACKNOWLEDGE) {
            if (isQBrowserMsg == false) {
                session.clientAcknowledgeThisMessage(this);
            }
        }
    }

    /**
     * Acknowledge all messages in this session up through this message.
     *
     * <P>
     * MQ messages support the acknowledgeThisMessage() method for use the client has specified that the session is
     * CLIENT_ACKNOWLEDGE
     *
     * @exception JMSException if JMS fails to acknowledge due to some internal JMS error.
     *
     * @exception IllegalStateException if this method is called on a closed session.
     */
    @Override
    public void acknowledgeUpThroughThisMessage() throws JMSException {
        if (session != null && session.acknowledgeMode == Session.CLIENT_ACKNOWLEDGE) {
            if (isQBrowserMsg == false) {
                session.clientAcknowledgeUpThroughThisMessage(this);
            }
        }
    }

    /**
     * Clear out the message body. Clearing a message's body does not clear its header values or property entries.
     *
     * <P>
     * If this message body was read-only, calling this method leaves the message body is in the same state as an empty body
     * in a newly created message.
     *
     * @exception JMSException if JMS fails to due to some internal JMS error.
     */

    @Override
    public void clearBody() throws JMSException {
        // do nothing, this is designed to be over-written by sub-classes.
    }

    /**
     * Get message delivery mode. This is set after message is sent to the broker.
     *
     * @return true if persistent message. Otherwise, returns false.
     */
    public boolean _getPersistent() {
        return pkt.getPersistent();
    }

    /**
     * Get send acknowledge flag. This flag is set to true if producer waits for broker's ack when producing this message.
     *
     * @return send acknowledge flag in the packet.
     */
    public boolean _getSendAcknowledge() {
        return pkt.getSendAcknowledge();
    }

    /**
     * once consumed via the RA, message acknowledgment is via the RA only
     */
    public void _setConsumerInRA() {
        consumerInRA = true;
    }

    protected void setIsBrowserMsg(boolean flag) {
        this.isQBrowserMsg = flag;
    }

    protected boolean isBrowserMessage() {
        return this.isQBrowserMsg;
    }

    protected boolean _isExpired() {
        long exptime = pkt.getExpiration();
        if (exptime <= 0L) {
            return false;
        }
        return (System.currentTimeMillis() > exptime);
    }

    @Override
    public void dump(PrintStream ps) {
        ps.println("------ MessageImpl dump ------");

        if (pkt != null) {
            pkt.dump(ps);
        }
    }

    /**
     * Returns the Class Name, Message Header entries of Message Object along with a listing of its configuration.
     *
     * @return A formatted String containing the Class Name, Message Header entries of this message object along with a
     * listing of its configuration.
     *
     */
    @Override
    public String toString() {
        String temp = null;
        try {
            temp = new StringBuffer().append("\nClass:\t\t\t").append(getClass().getName()).append("\ngetJMSMessageID():\t").append(getJMSMessageID())
                    .append("\ngetJMSTimestamp():\t").append(Long.toString(getJMSTimestamp())).append("\ngetJMSCorrelationID():\t")
                    .append(getJMSCorrelationID()).append("\nJMSReplyTo:\t\t")
                    .append(getJMSReplyTo() != null ? ((com.sun.messaging.Destination) getJMSReplyTo()).getName() : "null").append("\nJMSDestination:\t\t")
                    .append(getJMSDestination() != null ? ((com.sun.messaging.Destination) getJMSDestination()).getName() : "null")
                    .append("\ngetJMSDeliveryMode():\t").append(getJMSDeliveryMode() == DeliveryMode.PERSISTENT ? "PERSISTENT" : "NON PERSISTENT")
                    .append("\ngetJMSRedelivered():\t").append(Boolean.toString(getJMSRedelivered())).append("\ngetJMSType():\t\t").append(getJMSType())
                    .append("\ngetJMSExpiration():\t").append(Long.toString(getJMSExpiration())).append("\ngetJMSDeliveryTime():\t")
                    .append(Long.toString(getJMSDeliveryTime())).append("\ngetJMSPriority():\t").append(Integer.toString(getJMSPriority()))
                    .append("\nProperties:\t\t").append(properties == null ? "null" : properties.toString()).toString();
        } catch (JMSException ex) {
            ex.printStackTrace();
        }
        return temp;
    }

    @Override
    public <T> T getBody(Class<T> c) throws JMSException {
        return _getBody(this, c);
    }

    public static <T> T _getBody(Message message, Class<T> c) throws JMSException {

        if (message instanceof TextMessage) {
            TextMessage textMessage = (TextMessage) message;
            String payload = textMessage.getText();
            if (payload == null) {
                return null;
            }
            if (c.isAssignableFrom(String.class)) {
                return (T) payload;
            } else {
                // "Message body is a {0} and cannot be assigned to the specified class {1}"
                String errorString = AdministeredObject.cr.getKString(ClientResources.X_BODY_CLASS_INVALID, String.class, c);
                MessageFormatException mfre = new com.sun.messaging.jms.MessageFormatException(errorString, ClientResources.X_BODY_CLASS_INVALID);
                ExceptionHandler.throwJMSException(mfre);
            }
        } else if (message instanceof ObjectMessage) {
            ObjectMessage objectMessage = (ObjectMessage) message;
            Serializable payload = objectMessage.getObject();
            if (payload == null) {
                return null;
            }
            if (c.isAssignableFrom(payload.getClass())) {
                return (T) payload;
            } else {
                // "Message body is a {0} and cannot be assigned to the specified class {1}"
                String errorString = AdministeredObject.cr.getKString(ClientResources.X_BODY_CLASS_INVALID, payload.getClass(), c);
                MessageFormatException mfre = new com.sun.messaging.jms.MessageFormatException(errorString, ClientResources.X_BODY_CLASS_INVALID);
                ExceptionHandler.throwJMSException(mfre);
            }
        } else if (message instanceof BytesMessage) {
            BytesMessage bytesMessage = (BytesMessage) message;
            bytesMessage.reset();
            long numBytes = bytesMessage.getBodyLength();
            if (numBytes == 0) {
                return null;
            }
            byte[] payload = new byte[(int) numBytes];
            bytesMessage.readBytes(payload);
            bytesMessage.reset();
            if (c.isAssignableFrom(byte[].class)) {
                return (T) payload;
            } else {
                // "Message body is a {0} and cannot be assigned to the specified class {1}"
                String errorString = AdministeredObject.cr.getKString(ClientResources.X_BODY_CLASS_INVALID, byte[].class, c);
                MessageFormatException mfre = new com.sun.messaging.jms.MessageFormatException(errorString, ClientResources.X_BODY_CLASS_INVALID);
                ExceptionHandler.throwJMSException(mfre);
            }
        } else if (message instanceof MapMessage) {
            MapMessage mapMessage = (MapMessage) message;
            if (!mapMessage.getMapNames().hasMoreElements()) {
                return null;
            }
            Map<String, Object> payload = new HashMap<String, Object>();
            for (Enumeration<String> mapNamesEnum = mapMessage.getMapNames(); mapNamesEnum.hasMoreElements();) {
                String thisName = mapNamesEnum.nextElement();
                payload.put(thisName, mapMessage.getObject(thisName));
            }
            if (c.isAssignableFrom(Map.class)) {
                return (T) payload;
            } else {
                // "Message body is a {0} and cannot be assigned to the specified class {1}"
                String errorString = AdministeredObject.cr.getKString(ClientResources.X_BODY_CLASS_INVALID, Map.class, c);
                MessageFormatException mfre = new com.sun.messaging.jms.MessageFormatException(errorString, ClientResources.X_BODY_CLASS_INVALID);
                ExceptionHandler.throwJMSException(mfre);
            }
        } else if (message instanceof StreamMessage) {
            // "The body of a StreamMessage cannot be returned using this method"
            String errorString = AdministeredObject.cr.getKString(ClientResources.X_MESSAGE_TYPE_NOT_SUPPORTED);
            MessageFormatException mfre = new com.sun.messaging.jms.MessageFormatException(errorString, ClientResources.X_MESSAGE_TYPE_NOT_SUPPORTED);
            ExceptionHandler.throwJMSException(mfre);
        } else {
            // must be a Message
            // this doesn't have a payload
            return null;

        }
        // never reached but needed to keep compiler happy
        return null;
    }

    @Override
    public boolean isBodyAssignableTo(Class c) throws JMSException {
        return _isBodyAssignableTo(this, c);
    }

    public static boolean _isBodyAssignableTo(Message message, Class c) throws JMSException {
        try {
            message.getBody(c);
        } catch (MessageFormatException mfe) {
            return false;
        }
        return true;
    }

    public void updateDeliveryCount(int newDeliveryCount) {
        setProperty(ConnectionMetaDataImpl.JMSXDeliveryCount, Integer.valueOf(newDeliveryCount));
    }

    public int getClientRetries() {
        return clientRetries;
    }

    public void setClientRetries(int retryCount) {
        clientRetries = retryCount;
    }
}
