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 org.apache.geronimo.mail.handlers;
021    
022    import javax.activation.ActivationDataFlavor;
023    import javax.activation.DataContentHandler;
024    import javax.activation.DataSource;
025    import javax.mail.internet.ContentType;
026    import javax.mail.Message;
027    import javax.mail.MessageAware;
028    import javax.mail.MessageContext;
029    import javax.mail.MessagingException;
030    import javax.mail.internet.MimeMessage;
031    import javax.mail.internet.MimeUtility;
032    import javax.mail.internet.ParseException;
033    import java.awt.datatransfer.DataFlavor;
034    import java.io.IOException;
035    import java.io.OutputStream;
036    import java.io.UnsupportedEncodingException;
037    
038    public class MessageHandler implements DataContentHandler {
039        /**
040         * Field dataFlavor
041         */
042        ActivationDataFlavor dataFlavor;
043    
044        public MessageHandler(){
045            dataFlavor = new ActivationDataFlavor(java.lang.String.class, "message/rfc822", "Text");
046        }
047    
048    
049        /**
050         * Method getDF
051         *
052         * @return dataflavor
053         */
054        protected ActivationDataFlavor getDF() {
055            return dataFlavor;
056        }
057    
058        /**
059         * Method getTransferDataFlavors
060         *
061         * @return dataflavors
062         */
063        public DataFlavor[] getTransferDataFlavors() {
064            return (new DataFlavor[]{dataFlavor});
065        }
066    
067        /**
068         * Method getTransferData
069         *
070         * @param dataflavor
071         * @param datasource
072         * @return
073         * @throws IOException
074         */
075        public Object getTransferData(DataFlavor dataflavor, DataSource datasource)
076                throws IOException {
077            if (getDF().equals(dataflavor)) {
078                return getContent(datasource);
079            }
080            return null;
081        }
082    
083        /**
084         * Method getContent
085         *
086         * @param datasource
087         * @return
088         * @throws IOException
089         */
090        public Object getContent(DataSource datasource) throws IOException {
091    
092            try {
093                // if this is a proper message, it implements the MessageAware interface.  We need this to
094                // get the associated session.
095                if (datasource instanceof MessageAware) {
096                    MessageContext context = ((MessageAware)datasource).getMessageContext();
097                    // construct a mime message instance from the stream, associating it with the
098                    // data source session.
099                    return new MimeMessage(context.getSession(), datasource.getInputStream());
100                }
101            } catch (MessagingException e) {
102                // we need to transform any exceptions into an IOException.
103                throw new IOException("Exception writing MimeMultipart: " + e.toString());
104            }
105            return null;
106        }
107    
108        /**
109         * Method writeTo
110         *
111         * @param object
112         * @param s
113         * @param outputstream
114         * @throws IOException
115         */
116        public void writeTo(Object object, String s, OutputStream outputstream) throws IOException {
117            // proper message type?
118            if (object instanceof Message) {
119                try {
120                    ((Message)object).writeTo(outputstream);
121                } catch (MessagingException e) {
122                    throw new IOException("Error parsing message: " + e.toString());
123                }
124            }
125        }
126    }
127