geronimo-mail_2.1_spec/src/main/java/jakarta/mail/internet/MimeBodyPart.java [381:438]:
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    public InputStream getInputStream() throws MessagingException, IOException {
        return getDataHandler().getInputStream();
    }

    protected InputStream getContentStream() throws MessagingException {
        if (contentStream != null) {
            return contentStream;
        }

        if (content != null) {
            return new ByteArrayInputStream(content);
        } else {
            throw new MessagingException("No content");
        }
    }

    public InputStream getRawInputStream() throws MessagingException {
        return getContentStream();
    }

    public synchronized DataHandler getDataHandler() throws MessagingException {
        if (dh == null) {
            dh = new DataHandler(new MimePartDataSource(this));
        }
        return dh;
    }
    
    public Object getContent() throws MessagingException, IOException {
        
        if (cachedContent != null) {
            return cachedContent;
        }
        
        final Object c = getDataHandler().getContent();
        
        if (MimeBodyPart.cacheMultipart && (c instanceof Multipart || c instanceof Message) && (content != null || contentStream != null)) {
            cachedContent = c;
 
            if (c instanceof MimeMultipart) {
                ((MimeMultipart) c).parse();
            }
        }
        
        return c;
    }

    public void setDataHandler(final DataHandler handler) throws MessagingException {
        dh = handler;
        // if we have a handler override, then we need to invalidate any content
        // headers that define the types.  This information will be derived from the
        // data heander unless subsequently overridden.
        removeHeader("Content-Type");
        removeHeader("Content-Transfer-Encoding");
        cachedContent = null;

    }

    public void setContent(final Object content, final String type) throws MessagingException {
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geronimo-mail_2.1_spec/src/main/java/jakarta/mail/internet/MimeMessage.java [951:1008]:
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    public InputStream getInputStream() throws MessagingException, IOException {
        return getDataHandler().getInputStream();
    }

    protected InputStream getContentStream() throws MessagingException {
        if (contentStream != null) {
            return contentStream;
        }

        if (content != null) {
            return new ByteArrayInputStream(content);
        } else {
            throw new MessagingException("No content");
        }
    }

    public InputStream getRawInputStream() throws MessagingException {
        return getContentStream();
    }

    public synchronized DataHandler getDataHandler() throws MessagingException {
        if (dh == null) {
            dh = new DataHandler(new MimePartDataSource(this));
        }
        return dh;
    }

    public Object getContent() throws MessagingException, IOException {
        
        if (cachedContent != null) {
            return cachedContent;
        }
        
        final Object c = getDataHandler().getContent();
        
        if (MimeBodyPart.cacheMultipart && (c instanceof Multipart || c instanceof Message) && (content != null || contentStream != null)) {
            cachedContent = c;
 
            if (c instanceof MimeMultipart) {
                ((MimeMultipart) c).parse();
            }
        }
        
        return c;
    }

    //TODO make synchronized?
    public void setDataHandler(final DataHandler handler) throws MessagingException {
        dh = handler;
        // if we have a handler override, then we need to invalidate any content
        // headers that define the types.  This information will be derived from the
        // data heander unless subsequently overridden.
        removeHeader("Content-Type");
        removeHeader("Content-Transfer-Encoding");
        cachedContent = null;
    }

    public void setContent(final Object content, final String type) throws MessagingException {
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