Hi Dan,
dont think JAF solves these kind of problems all at once out of the box.
JAF is no silver bullet.
It only provides an extensible api for these kinds of problems.
If you want it to detect a fileformat you or Sun or anybody else has to
provide the code for it. It is long ago since I looked into this api but
I am sure that you can extend the detection capabilities yourself.
Read http://java.sun.com/products/javabeans/glasgow/JAF-1.0.pdf for
further information and look at the samples coming with JAF.
This is out of JAF-1.0.pdf:
There is a one-to-one correspondence between underlying data items
(files for instance)
and DataSource objects. Also note that the class that implements the
DataSource
interface is responsible for typing the data. To manage a file system, a
DataSource can
use a simple mechanism such as a file extension to type data, while a
DataSource that
supports incoming web-based data can actually examine the data stream to
determine its
type.
public interface DataSource {
/**
* This method returns the MIME Type of the data in the form
* of a string. It should always return a valid type. It is
* suggested that getContentType return
* “application/octet-stream” if the DataSource implementation
* can not determine the data type.
*
* @return the MIME Type
*/
public String getContentType();
..
If you dont understand how to extends this for your purposes perhaps you
find a open source email client software that uses JAF. I am not sure
about this but it is where I would start searching.
Best regards,
Carsten
Dan McKeon wrote:
This is great for ASCII, but do you know how to get more information
from an "application/octet-stream" result?
Carsten Hammer <[EMAIL PROTECTED]>
10/27/2005 04:02 PM
To
Dan McKeon <[EMAIL PROTECTED]>
cc
iText Mail Group <[email protected]>
Subject
Re: Image Type Detection
Hi Dan,
if you want to keep with standard apis then you should try to use
String mimetype=new FileDataSource(filename).getContentType();
See the examples coming with JavaBeans(TM) Activation Framework for how
to use it.
Best regards,
Carsten
Dan McKeon wrote:
>
> Our extensions reflect the business process rather than the file type.
> For example, everything we scan is TIFF, but they may have a IIX, SCN,
> PSM, etc extension. We have database codes associated with the files
> that I can use to tell me what format it is, but I was looking for
> something more generic, whether the file is registered with our system
> or not.
>
>
>
>
> "Bill Ensley" <[EMAIL PROTECTED]>
>
> 10/25/2005 03:02 PM
>
>
> To
> "'Dan McKeon'" <[EMAIL PROTECTED]>, "iText Mail
Group"
> <[email protected]>
> cc
>
> Subject
> RE: [iText-questions] Image Type Detection
>
>
>
>
>
>
>
>
> Just check the extension.
>
> .txt
> .doc
> .pdf
> .jpg
>
> etc
>
> Bill Ensley
> Bear Printing
>
> ------------------------------------------------------------------------
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Dan
McKeon
> Sent: Tuesday, October 25, 2005 12:32 PM
> To: Bruno Lowagie
> Cc: [email protected]
> Subject: Re: [iText-questions] Image Type Detection
>
>
> I just wasn't sure if iText could tell me if my input file is ASCII or
> PCL. I figured out how to detect PDF. I invoke PdfReader and if it
> throws an exception, I know it's not PDF. Is there anything like that
> for ASCII or PCL?
>
>
>
> Bruno Lowagie <[EMAIL PROTECTED]>
>
> 10/25/2005 01:26 PM
>
>
> To
> Dan McKeon <[EMAIL PROTECTED]>
> cc
> [email protected]
> Subject
> Re: [iText-questions] Image Type Detection
>
>
>
>
>
>
>
>
>
>
> Dan McKeon wrote:
>
> >
> > I am a programmer on an Image Team. The documents in our system are
> > TIFF, JPEG, ASCII, PCL, PDF. I wanted to code a web service that
> > could detect what was being input and just always output a PDF.
>
> That I can understand. You want to write some software that can detect
> the format of a file.
> What I didn't understand is why you would want to stuff that in the
> Image class.
> I'm still not sure if your mail contains a question or an intention.
> br,
> Bruno
>
>
>
>
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