/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common Development * and Distribution License("CDDL") (collectively, the "License").  You * may not use this file except in compliance with the License. You can obtain * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific * language governing permissions and limitations under the License. * * When distributing the software, include this License Header Notice in each * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt. * Sun designates this particular file as subject to the "Classpath" exception * as provided by Sun in the GPL Version 2 section of the License file that * accompanied this code.  If applicable, add the following below the License * Header, with the fields enclosed by brackets [] replaced by your own * identifying information: "Portions Copyrighted [year] * [name of copyright owner]" * * Contributor(s): * * If you wish your version of this file to be governed by only the CDDL or * only the GPL Version 2, indicate your decision by adding "[Contributor] * elects to include this software in this distribution under the [CDDL or GPL * Version 2] license."  If you don't indicate a single choice of license, a * recipient has the option to distribute your version of this file under * either the CDDL, the GPL Version 2 or to extend the choice of license to * its licensees as provided above.  However, if you add GPL Version 2 code * and therefore, elected the GPL Version 2 license, then the option applies * only if the new code is made subject to such option by the copyright * holder. *//* * @(#)MessageContext.java	1.7 07/05/04 */package javax.mail;/** * The context in which a piece of Message content is contained.  A * <code>MessageContext</code> object is returned by the * <code>getMessageContext</code> method of the * <code>MessageAware</code> interface.  <code>MessageAware</code> is * typically implemented by <code>DataSources</code> to allow a * <code>DataContentHandler</code> to pass on information about the * context in which a data content object is operating. * * @see javax.mail.MessageAware * @see javax.activation.DataSource * @see javax.activation.DataContentHandler * @since	JavaMail 1.1 */public class MessageContext {    private Part part;    /**     * Create a MessageContext object describing the context of the given Part.     */    public MessageContext(Part part) {	this.part = part;    }    /**     * Return the Part that contains the content.     *     * @return	the containing Part, or null if not known     */    public Part getPart() {	return part;    }    /**     * Return the Message that contains the content.     * Follows the parent chain up through containing Multipart     * objects until it comes to a Message object, or null.     *     * @return	the containing Message, or null if not known     */    public Message getMessage() {	try {	    return getMessage(part);	} catch (MessagingException ex) {	    return null;	}    }    /**     * Return the Message containing an arbitrary Part.     * Follows the parent chain up through containing Multipart     * objects until it comes to a Message object, or null.     *     * @return	the containing Message, or null if none     * @see javax.mail.BodyPart#getParent     * @see javax.mail.Multipart#getParent     */    private static Message getMessage(Part p) throws MessagingException {	while (p != null) {	    if (p instanceof Message)		return (Message)p;	    BodyPart bp = (BodyPart)p;	    Multipart mp = bp.getParent();	    if (mp == null)	// MimeBodyPart might not be in a MimeMultipart		return null;	    p = mp.getParent();	}	return null;    }    /**     * Return the Session we're operating in.     *     * @return	the Session, or null if not known     */    public Session getSession() {	Message msg = getMessage();	return msg != null ? msg.session : null;    }}