aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @(#)MimePartDataSource.java        1.9 02/03/27
aoqi@0:  */
aoqi@0: 
aoqi@0: 
aoqi@0: 
aoqi@0: package com.sun.xml.internal.messaging.saaj.packaging.mime.internet;
aoqi@0: 
aoqi@0: import java.io.*;
aoqi@0: import java.net.UnknownServiceException;
aoqi@0: 
aoqi@0: import javax.activation.DataSource;
aoqi@0: 
aoqi@0: import com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * A utility class that implements a DataSource out of
aoqi@0:  * a MimeBodyPart. This class is primarily meant for service providers.
aoqi@0:  *
aoqi@0:  * @author      John Mani
aoqi@0:  */
aoqi@0: 
aoqi@0: public final class MimePartDataSource implements DataSource {
aoqi@0:     private final MimeBodyPart part;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Constructor, that constructs a DataSource from a MimeBodyPart.
aoqi@0:      */
aoqi@0:     public MimePartDataSource(MimeBodyPart part) {
aoqi@0:         this.part = part;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns an input stream from this  MimeBodyPart. <p>
aoqi@0:      *
aoqi@0:      * This method applies the appropriate transfer-decoding, based
aoqi@0:      * on the Content-Transfer-Encoding attribute of this MimeBodyPart.
aoqi@0:      * Thus the returned input stream is a decoded stream of bytes.<p>
aoqi@0:      *
aoqi@0:      * This implementation obtains the raw content from the MimeBodyPart
aoqi@0:      * using the <code>getContentStream()</code> method and decodes
aoqi@0:      * it using the <code>MimeUtility.decode()</code> method.
aoqi@0:      *
aoqi@0:      * @return  decoded input stream
aoqi@0:      */
aoqi@0:     public InputStream getInputStream() throws IOException {
aoqi@0: 
aoqi@0:         try {
aoqi@0:         InputStream is = part.getContentStream();
aoqi@0: 
aoqi@0:             String encoding = part.getEncoding();
aoqi@0:             if (encoding != null)
aoqi@0:                 return MimeUtility.decode(is, encoding);
aoqi@0:             else
aoqi@0:                 return is;
aoqi@0:         } catch (MessagingException mex) {
aoqi@0:             throw new IOException(mex.getMessage());
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * DataSource method to return an output stream. <p>
aoqi@0:      *
aoqi@0:      * This implementation throws the UnknownServiceException.
aoqi@0:      */
aoqi@0:     public OutputStream getOutputStream() throws IOException {
aoqi@0:         throw new UnknownServiceException();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns the content-type of this DataSource. <p>
aoqi@0:      *
aoqi@0:      * This implementation just invokes the <code>getContentType</code>
aoqi@0:      * method on the MimeBodyPart.
aoqi@0:      */
aoqi@0:     public String getContentType() {
aoqi@0:         return part.getContentType();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * DataSource method to return a name.  <p>
aoqi@0:      *
aoqi@0:      * This implementation just returns an empty string.
aoqi@0:      */
aoqi@0:     public String getName() {
aoqi@0:         try {
aoqi@0:                 return part.getFileName();
aoqi@0:         } catch (MessagingException mex) {
aoqi@0:         return "";
aoqi@0:         }
aoqi@0:     }
aoqi@0: }