How to create a MimeBodyPart properly with an InputStream in the constructo

Question

I am looping through a list of email attachments.
In this loop I am doing the following:
(Don't worry about the Core object, it works and returns a valid InputStream, tested this before by just reading out the bytes)
                 InputStream attachInputStream = Core.getFileDocumentContent(attachObject);
                   System.out.println("available for original stream: " + attachInputStream.available());
                   MimeBodyPart attachmentBodyPart = new MimeBodyPart(attachInputStream);
                   InputStream testStream = attachmentBodyPart.getInputStream();
                   System.out.println("available for retrieved stream: " + testStream.available());
                   attachmentBodyPart.setFileName(attachment.getName());
               multipart.addBodyPart(attachmentBodyPart);Because my received attachments were always empty, I added a few println's to check where this were going wrong. Following is the output when I run the application:
available for original stream: 119
available for retrieved stream: 0
So, apparently something goes wrong in the constructor for MimeBodyPart.
I hope I'm just doing something silly but I'm out of options at the moment apart of writing a lot of extra code to handle converting an InputStream to a MimeBodypart myself.
Anyone with some ideas?
edit: I just read I cannot use available after getting an inputstream from a mimebodypart. So I'll go and make another check. Problem still exists though, I'm not getting an attachment after mailing it.
Edited by: Bas_Rotterdam on Apr 15, 2009 3:16 AM

Answer 1

I'm not clear on what you're trying to accomplish.
Are you trying to create a message with attachments, where the content of the
attachments comes from InputStreams from your Core object? If so, you're
going about it the wrong way.
The MimeBodyPart constructor expects the input stream to be formatted as
an entire body part - headers plus content. You only have the content. For
that you want to use the setContent method or one of the related methods
(setDataHandler, setText, attachFile) that sets the content of the body part.
See the sendfile.java demo program included with JavaMail for an example of
creating an attachment with content from a file.
And don't forget to read the [JavaMail FAQ|http://java.sun.com/products/javamail/FAQ.html].