1 /*

     2  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 /*

    27  * @(#)MimePartDataSource.java        1.9 02/03/27

    28  */

    29 

    30 

    31 

    32 package com.sun.xml.internal.messaging.saaj.packaging.mime.internet;

    33 

    34 import java.io.*;

    35 import java.net.UnknownServiceException;

    36 

    37 import javax.activation.DataSource;

    38 

    39 import com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException;

    40 

    41 /**

    42  * A utility class that implements a DataSource out of

    43  * a MimeBodyPart. This class is primarily meant for service providers.

    44  *

    45  * @author      John Mani

    46  */

    47 

    48 public final class MimePartDataSource implements DataSource {

    49     private final MimeBodyPart part;

    50 

    51     /**

    52      * Constructor, that constructs a DataSource from a MimeBodyPart.

    53      */

    54     public MimePartDataSource(MimeBodyPart part) {

    55         this.part = part;

    56     }

    57 

    58     /**

    59      * Returns an input stream from this  MimeBodyPart. <p>

    60      *

    61      * This method applies the appropriate transfer-decoding, based

    62      * on the Content-Transfer-Encoding attribute of this MimeBodyPart.

    63      * Thus the returned input stream is a decoded stream of bytes.<p>

    64      *

    65      * This implementation obtains the raw content from the MimeBodyPart

    66      * using the <code>getContentStream()</code> method and decodes

    67      * it using the <code>MimeUtility.decode()</code> method.

    68      *

    69      * @return  decoded input stream

    70      */

    71     public InputStream getInputStream() throws IOException {

    72 

    73         try {

    74         InputStream is = part.getContentStream();

    75 

    76             String encoding = part.getEncoding();

    77             if (encoding != null)

    78                 return MimeUtility.decode(is, encoding);

    79             else

    80                 return is;

    81         } catch (MessagingException mex) {

    82             throw new IOException(mex.getMessage());

    83         }

    84     }

    85 

    86     /**

    87      * DataSource method to return an output stream. <p>

    88      *

    89      * This implementation throws the UnknownServiceException.

    90      */

    91     public OutputStream getOutputStream() throws IOException {

    92         throw new UnknownServiceException();

    93     }

    94 

    95     /**

    96      * Returns the content-type of this DataSource. <p>

    97      *

    98      * This implementation just invokes the <code>getContentType</code>

    99      * method on the MimeBodyPart.

   100      */

   101     public String getContentType() {

   102         return part.getContentType();

   103     }

   104 

   105     /**

   106      * DataSource method to return a name.  <p>

   107      *

   108      * This implementation just returns an empty string.

   109      */

   110     public String getName() {

   111         try {

   112                 return part.getFileName();

   113         } catch (MessagingException mex) {

   114         return "";

   115         }

   116     }

   117 }