When using repeatedely the same template it's often overlooked the
PdfReader copy constructor that can speed up things. For example and
taking your example:
PdfReader original = new PdfReader(readerStream ); //store the original
somewhere
PdfReader polReader = new PdfReader(original); //repeat this for each
run
Paulo
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Iliadis Yannis
> Sent: Friday, April 13, 2007 2:37 PM
> To: Post all your questions about iText here
> Subject: Re: [iText-questions] Reading a PDF via a
> ByteArrayOutputStream?
>
> To give you a small example:
>
> First I define a static reference to the template (physical file).
> static String TEMPLATE_PATH="print/templates/template.pdf";
>
>
> Later in my code I have a function which adds contents to the pdf.
>
> ByteArrayOutputStream policyAsOutputStream = new
> ByteArrayOutputStream();
>
> InputStream
> readerStream=getClass().getResourceAsStream(TEMPLATE_PATH);
>
> PdfReader polReader = new PdfReader(readerStream );
>
> PdfStamper polStamp = new PdfStamper(polReader,
> policyAsOutputStream);
>
> After that I do all my content manipulation (e.g. setting
> acrofields with data, placing tables, list etc.)
>
> And at the end I return the ByteArrayOutputStream which is
> servered through the web service to the web client.
>
> return policyAsOutputStream;
>
>
>
> 2007/4/13, Mork Afur <[EMAIL PROTECTED]>:
>
> Interesting.
>
> It really sounds like the file based approach makes
> more sense (since the
> Adobe plug-in can't handle memory-only baos's).
>
> Iliadis mentioned reading the PDF into a
> ByteArrayOutputStream. However,
> checking around the book (including chapter 17), I
> didn't find a simple way
> to load an existing file-based PDF into a baos.
>
> The following example files use baos, but, don't seem
> to load an existing
> PDF into one. (probably because it's not useful?)
>
> C:\temp\examples\chapter02\HelloWorldAddMetadata.java
> C:\temp\examples\chapter02\HelloWorldCopyStamp.java
> C:\temp\examples\chapter02\HelloWorldStampCopy.java
> C:\temp\examples\chapter02\HelloWorldStampCopyStamp.java
> C:\temp\examples\chapter17\FoobarCourses.java
> C:\temp\examples\chapter17\helloworld.jsp
> C:\temp\examples\chapter17\OutSimplePdf.java
> C:\temp\examples\chapter17\ProgressServlet.java
> C:\temp\examples\chapterF\HelloWorldAddMetadata.java
> C:\temp\examples\chapterF\HelloWorldXmpMetadata.java
>
> Thanks in advance.
>
> M
>
>
> >From: "Bruno Lowagie (iText)" <[EMAIL PROTECTED]>
> >Reply-To: Post all your questions about iText here
> >< [EMAIL PROTECTED]>
> >To: Post all your questions about iText here
> ><[EMAIL PROTECTED] >
> >Subject: Re: [iText-questions] Reading a PDF via a
> ByteArrayOutputStream?
> >Date: Fri, 13 Apr 2007 13:43:37 +0200
> >
> >Strange, I received the answer to this question,
> >but not the original question. Anyhow:
> >
> >Iliadis Yannis wrote:
> > > I for myself read a pdf template (physical file) into a
> > > ByteArrayOutputStream and pass it to a PdfStamper
> where I do all the
> > > manipulation (in your case a PdfWriter object).
> >
> >That's an ideal way to do it if you are reusing
> >the same template over and over again.
> >
> > > After that the final pdf (still a
> ByteArrayOutputStream) is send through
> > > a web service to the clients web browser. From
> there the adobe reader
> > > plug takes over and shows the pdf.
> >
> >Yep, but remember that the PDF will be stored somewhere
> >as a file on the client machine (maybe only temporarily).
> >Most viewer (certainly Adobe Reader) need the PDF as a
> >file; Adobe Reader doesn't accept a byte stream from memory.
> >
> > > 2007/4/13, Mork Afur <[EMAIL PROTECTED]
> > > <mailto: [EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]> >>:
> > >
> > > In the case where a file-based PDF would have a
> short life span, we
> >are
> > > thinking about just using a
> ByteArrayOutputStream representation for
> > > creating and viewing the PDF.
> > >
> > > Is this possible? I'm not sure how we'd "view" the
> > > ByteArrayOutputStream.
> > >
> > > Also, there is only one example (in the 297
> java examples with the
> >book)
> > > that returns a "baos" object.
> >
> >In Chapter 2 I explain that you can write to any OutputStream,
> >including a ByteArrayOutputStream. Point is: how are you going
> >to send those bytes to a Viewer?
> >If you really want to keep the documents in memory only,
> >you could try writing a PDF to a Ramdisk and let the viewer
> >read it from there. I haven't tried this yet. Do people still
> >use ramdisk? I feel very old when I use that word...
> >
> >br,
> >Bruno
> >
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