MessageHeaders.java :  » Calendar » kolab-android » com » sun » mail » dsn » Android Open Source

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2008 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.
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 * Header, with the fields enclosed by brackets [] replaced by your own
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 * 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
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package com.sun.mail.dsn;

import java.io.ByteArrayInputStream;
import java.io.InputStream;

import javax.activation.DataHandler;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.internet.InternetHeaders;
import javax.mail.internet.MimeMessage;

/**
 * A special MimeMessage object that contains only message headers,
 * no content.  Used to represent the MIME type text/rfc822-headers.
 *
 * @since  JavaMail 1.4
 */
public class MessageHeaders extends MimeMessage {

    /**
     * Construct a MessageHeaders object.
     */
    public MessageHeaders() throws MessagingException {
  super((Session)null);
  content = new byte[0];
    }

    /**
     * Constructs a MessageHeaders object from the given InputStream.
     *
     * @param  is  InputStream
     */
    public MessageHeaders(InputStream is) throws MessagingException {
  super(null, is);
  content = new byte[0];
    }

    /**
     * Constructs a MessageHeaders object using the given InternetHeaders.
     *
     * @param  headers  InternetHeaders to use
     */
    public MessageHeaders(InternetHeaders headers) throws MessagingException {
  super((Session)null);
  this.headers = headers;
  content = new byte[0];
    }

    /**
     * Return the size of this message.
     * Always returns zero.
     */
    public int getSize() {
  return 0;
    }

    public InputStream getInputStream() {
  return new ByteArrayInputStream(content);
    }

    protected InputStream getContentStream() {
  return new ByteArrayInputStream(content);
    }

    /**
     * Can't set any content for a MessageHeaders object.
     *
     * @exception  MessagingException  always
     */
    public void setDataHandler(DataHandler dh) throws MessagingException {
  throw new MessagingException("Can't set content for MessageHeaders");
    }

}