Ejemplo n.º 1
0
 /** Return the content. */
 public Object getContent(DataSource ds) throws IOException {
   // create a new DeliveryStatus
   try {
     /*
        Session session;
        if (ds instanceof MessageAware) {
     javax.mail.MessageContext mc =
     	((MessageAware)ds).getMessageContext();
     session = mc.getSession();
        } else {
     // Hopefully a rare case.  Also hopefully the application
     // has created a default Session that can just be returned
     // here.  If not, the one we create here is better than
     // nothing, but overall not a really good answer.
     session = Session.getDefaultInstance(new Properties(), null);
        }
        return new DeliveryStatus(session, ds.getInputStream());
        */
     return new DeliveryStatus(ds.getInputStream());
   } catch (MessagingException me) {
     throw new IOException(
         "Exception creating DeliveryStatus in "
             + "message/delivery-status DataContentHandler: "
             + me.toString());
   }
 }
Ejemplo n.º 2
0
  /**
   * Return the Transfer Data of type DataFlavor from InputStream.
   *
   * @param df the DataFlavor
   * @param ds the DataSource
   * @return the constructed Object
   */
  public Object getTransferData(DataFlavor df, DataSource ds)
      throws UnsupportedFlavorException, IOException {

    if (dch != null) return dch.getTransferData(df, ds);
    else if (df.equals(getTransferDataFlavors()[0])) // only have one now
    return ds.getInputStream();
    else throw new UnsupportedFlavorException(df);
  }
Ejemplo n.º 3
0
  /**
   * Get the InputStream for this object.
   *
   * <p>For DataHandlers instantiated with a DataSource, the DataHandler calls the <code>
   * DataSource.getInputStream</code> method and returns the result to the caller.
   *
   * <p>For DataHandlers instantiated with an Object, the DataHandler first attempts to find a
   * DataContentHandler for the Object. If the DataHandler can not find a DataContentHandler for
   * this MIME type, it throws an UnsupportedDataTypeException. If it is successful, it creates a
   * pipe and a thread. The thread uses the DataContentHandler's <code>writeTo</code> method to
   * write the stream data into one end of the pipe. The other end of the pipe is returned to the
   * caller. Because a thread is created to copy the data, IOExceptions that may occur during the
   * copy can not be propagated back to the caller. The result is an empty stream.
   *
   * <p>
   *
   * @return the InputStream representing this data
   * @exception IOException if an I/O error occurs
   * @see javax.activation.DataContentHandler#writeTo
   * @see javax.activation.UnsupportedDataTypeException
   */
  public InputStream getInputStream() throws IOException {
    InputStream ins = null;

    if (dataSource != null) {
      ins = dataSource.getInputStream();
    } else {
      DataContentHandler dch = getDataContentHandler();
      // we won't even try if we can't get a dch
      if (dch == null)
        throw new UnsupportedDataTypeException("no DCH for MIME type " + getBaseType());

      if (dch instanceof ObjectDataContentHandler) {
        if (((ObjectDataContentHandler) dch).getDCH() == null)
          throw new UnsupportedDataTypeException("no object DCH for MIME type " + getBaseType());
      }
      // there is none but the default^^^^^^^^^^^^^^^^
      final DataContentHandler fdch = dch;

      // from bill s.
      // ce n'est pas une pipe!
      //
      // NOTE: This block of code needs to throw exceptions, but
      // can't because it is in another thread!!! ARG!
      //
      final PipedOutputStream pos = new PipedOutputStream();
      PipedInputStream pin = new PipedInputStream(pos);
      new Thread(
              new Runnable() {
                public void run() {
                  try {
                    fdch.writeTo(object, objectMimeType, pos);
                  } catch (IOException e) {

                  } finally {
                    try {
                      pos.close();
                    } catch (IOException ie) {
                    }
                  }
                }
              },
              "DataHandler.getInputStream")
          .start();
      ins = pin;
    }

    return ins;
  }
Ejemplo n.º 4
0
  /**
   * Write the data to an <code>OutputStream</code>.
   *
   * <p>If the DataHandler was created with a DataSource, writeTo retrieves the InputStream and
   * copies the bytes from the InputStream to the OutputStream passed in.
   *
   * <p>If the DataHandler was created with an object, writeTo retrieves the DataContentHandler for
   * the object's type. If the DataContentHandler was found, it calls the <code>writeTo</code>
   * method on the <code>DataContentHandler</code>.
   *
   * @param os the OutputStream to write to
   * @exception IOException if an I/O error occurs
   */
  public void writeTo(OutputStream os) throws IOException {
    // for the DataSource case
    if (dataSource != null) {
      InputStream is = null;
      byte data[] = new byte[8 * 1024];
      int bytes_read;

      is = dataSource.getInputStream();

      try {
        while ((bytes_read = is.read(data)) > 0) {
          os.write(data, 0, bytes_read);
        }
      } finally {
        is.close();
        is = null;
      }
    } else { // for the Object case
      DataContentHandler dch = getDataContentHandler();
      dch.writeTo(object, objectMimeType, os);
    }
  }
Ejemplo n.º 5
0
  public Object getContent(DataSource ds) throws IOException {

    if (dch != null) return dch.getContent(ds);
    else return ds.getInputStream();
  }