Re: Brain cramp: reading an IFS file from program running on PC

["Joe Sam Shirah" <joe_sam@xxxxxxxxxxxxx>]

   Hi David,

> >     Yep, sort of.  In your case - cross platform - it's only because a
> > certain method in IFSTextFileInputStream does it for you.
>
> Or doesn't do, in this case.

   From the IFSTextFileInputStream javadoc I saw, which was for V5R1, the 
documentation for:

public java.lang.String read(int length)

is the only place I saw CCSID or conversion mentioned.

> >     I wouldn't be surprised at all, in fact I would expect, that the
> > "properties" file doesn't load properly even using Java on the AS/400.
> > If it does, it's a convenience IBM decided to supply.
>
> Using the IFSFileInputStream probably won't work running
> on the 400 (without my modification) ... but I do know that using
> a normal FileInputStream does work on the 400.  I use it all the
> time.

   What I meant by the above was that I wouldn't expect a file using an
encoding other than (effectively) ISO 8859-1 to work on any system, given
the expectations documented in the Properties class.

> From another mail:

> Oddly enough, when Properties loads the InputStream ...
> it creates a reader internally.  You would think there
> should be a way to load properties passing in a Reader
> instead of an InputStream.

   There is, as of Java 6.


                                                        Joe Sam

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----- Original Message ----- 
From: "David Gibbs" <david@xxxxxxxxxxxx>
To: "Java Programming on and around the iSeries / AS400"
<java400-l@xxxxxxxxxxxx>
Sent: Monday, May 04, 2009 5:17 PM
Subject: Re: Brain cramp: reading an IFS file from program running on PC


> Joe Sam Shirah wrote:
> > > This is what I assumed the IFSTextFileInputStream class would do.
> > > Reading
> > > from a text file in Java should convert from >EBCDIC to Unicode
> > > automatically.
> >
> >     Yep, sort of.  In your case - cross platform - it's only because a
> > certain method in IFSTextFileInputStream does it for you.
>
> Or doesn't do, in this case.
>
> > > I'm 95% sure it DOES do that ... but I just can't figure out what I'm
> > > doing wrong.
> >
> >     You're making some invalid assumptions.
>
> True ... the assumption was that the code worked.  The problem was that
> there is clearly a bug in the IFSTextFileInputStream class.
>
> After a bit of digging I was able to correct problem and will be
> submitting a correction to the JT400 project.
>
> I added the following method to IFSTextFileInputStream ...
>
> ----------
> public int read(byte[] b) throws IOException {
>
> String input = read(b.
>
> byte[] inputBytes = input.getBytes();
>
> int inputLength = input.length();
>
> System.arraycopy(inputBytes, 0, b, 0, inputLength);
>
> return inputLength;
> }
> ----------
>
> >     I wouldn't be surprised at all, in fact I would expect, that the
> > "properties" file doesn't load properly even using Java on the AS/400.
> > If
> > it does, it's a convenience IBM decided to supply.
>
> Using the IFSFileInputStream probably won't work running on the 400
> (without my modification) ... but I do know that using a normal
> FileInputStream does work on the 400.  I use it all the time.
>
> david