1 /*
   2  * Copyright (c) 1997, 2017, 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 package com.sun.xml.internal.messaging.saaj.packaging.mime.internet;
  32 
  33 import com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException;

  34 
  35 import javax.activation.DataSource;
  36 import java.io.IOException;
  37 import java.io.InputStream;
  38 import java.io.OutputStream;
  39 import java.net.UnknownServiceException;
  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      * @param part body part
  55      */
  56     public MimePartDataSource(MimeBodyPart part) {
  57         this.part = part;
  58     }
  59 
  60     /**
  61      * Returns an input stream from this  MimeBodyPart. <p>
  62      *
  63      * This method applies the appropriate transfer-decoding, based
  64      * on the Content-Transfer-Encoding attribute of this MimeBodyPart.
  65      * Thus the returned input stream is a decoded stream of bytes.<p>
  66      *
  67      * This implementation obtains the raw content from the MimeBodyPart
  68      * using the <code>getContentStream()</code> method and decodes
  69      * it using the <code>MimeUtility.decode()</code> method.
  70      *
  71      * @return decoded input stream
  72      */
  73     @Override
  74     public InputStream getInputStream() throws IOException {
  75 
  76         try {
  77             InputStream is = part.getContentStream();
  78 
  79             String encoding = part.getEncoding();
  80             if (encoding != null)
  81                 return MimeUtility.decode(is, encoding);
  82             else
  83                 return is;
  84         } catch (MessagingException mex) {
  85             throw new IOException(mex.getMessage());
  86         }
  87     }
  88 
  89     /**
  90      * DataSource method to return an output stream. <p>
  91      *
  92      * This implementation throws the UnknownServiceException.
  93      */
  94     @Override
  95     public OutputStream getOutputStream() throws IOException {
  96         throw new UnknownServiceException();
  97     }
  98 
  99     /**
 100      * Returns the content-type of this DataSource. <p>
 101      *
 102      * This implementation just invokes the <code>getContentType</code>
 103      * method on the MimeBodyPart.
 104      */
 105     @Override
 106     public String getContentType() {
 107         return part.getContentType();
 108     }
 109 
 110     /**
 111      * DataSource method to return a name.  <p>
 112      *
 113      * This implementation just returns an empty string.
 114      */
 115     @Override
 116     public String getName() {
 117         try {
 118             return part.getFileName();
 119         } catch (MessagingException mex) {
 120             return "";
 121         }
 122     }
 123 }
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