001    /*
002     * Licensed to the Apache Software Foundation (ASF) under one
003     * or more contributor license agreements.  See the NOTICE file
004     * distributed with this work for additional information
005     * regarding copyright ownership.  The ASF licenses this file
006     * to you under the Apache License, Version 2.0 (the
007     * "License"); you may not use this file except in compliance
008     * with the License.  You may obtain a copy of the License at
009     *
010     *  http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing,
013     * software distributed under the License is distributed on an
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     * KIND, either express or implied.  See the License for the
016     * specific language governing permissions and limitations
017     * under the License.
018     */
019    
020    package javax.mail.internet;
021    
022    import java.io.IOException;
023    import java.io.InputStream;
024    import java.io.OutputStream;
025    import java.net.UnknownServiceException;
026    import javax.activation.DataSource;
027    import javax.mail.MessageAware;
028    import javax.mail.MessageContext;
029    import javax.mail.MessagingException;
030    
031    /**
032     * @version $Rev: 467553 $ $Date: 2006-10-25 00:01:51 -0400 (Wed, 25 Oct 2006) $
033     */
034    public class MimePartDataSource implements DataSource, MessageAware {
035        // the part that provides the data form this data source.
036        protected MimePart part;
037    
038        public MimePartDataSource(MimePart part) {
039            this.part = part;
040        }
041    
042        public InputStream getInputStream() throws IOException {
043            try {
044                InputStream stream;
045                if (part instanceof MimeMessage) {
046                    stream = ((MimeMessage) part).getContentStream();
047                } else if (part instanceof MimeBodyPart) {
048                    stream = ((MimeBodyPart) part).getContentStream();
049                } else {
050                    throw new MessagingException("Unknown part");
051                }
052                String encoding = part.getEncoding();
053                return encoding == null ? stream : MimeUtility.decode(stream, encoding);
054            } catch (MessagingException e) {
055                throw (IOException) new IOException(e.getMessage()).initCause(e);
056            }
057        }
058    
059        public OutputStream getOutputStream() throws IOException {
060            throw new UnknownServiceException();
061        }
062    
063        public String getContentType() {
064            try {
065                return part.getContentType();
066            } catch (MessagingException e) {
067                return null;
068            }
069        }
070    
071        public String getName() {
072            return "";
073        }
074    
075        public synchronized MessageContext getMessageContext() {
076            return new MessageContext(part);
077        }
078    }