Updating the AttachmentPart contents without creating new message

Question

I need to update the AttachmentPart contents inside a SOAPMessage as shown in following figure. I need to keep the headers same.
Is it possible to do it without creating a new SOAP message? I am using SAAJ APIs.

Answer 1

Can you use the SOAPMessage.getAttachments() call which returns an iterator of all the attachment parts to pull the attachments into a new object, make the necessary modifications, and then call the SOAPMessage.removeAllAttachments() function to clear the objects from the original message and call the addAttachmentPart(AttachmentPart) function to re-add the altered objects?

        SOAPMessage message = getSoapMessageFromString(foo);

        List<AttachmentPart> collectionOfAttachments = new ArrayList<AttachmentPart>();

        for (Iterator attachmentIterator = message.getAttachments(); attachmentIterator.hasNext()) {
            AttachmentPart attachment = (AttachmentPart) attachmentIterator.next();
            //**DO WORK HERE ON attachment**
            collectionOfAttachments.add(attachment);
        }

        message.removeAllAttachments();

        for (AttachmentPart newAttachment : collectionOfAttachments) {
            message.addAttachmentPart(newAttachment);
        }



 // This method takes an XML string as input and uses it to create a new
 // SOAPMessage object
 // and then returns that object for further use.
 private static SOAPMessage getSoapMessageFromString(String xml)
           throws SOAPException, IOException {

      MessageFactory factory = MessageFactory.newInstance();

      // Create a new message object with default MIME headers and the data
      // from the XML string we passed in
      SOAPMessage message = factory
                .createMessage(
                          new MimeHeaders(),
                          new ByteArrayInputStream(xml.getBytes(Charset
                                    .forName("UTF-8"))));
      return message;
 }

What kind of alterations are you looking to make to your attachments? Would it be easier to just keep the body in a DOM object and create a new SOAPMessage alltogether?