I think I figured out what my problem is. After I tokenize the commands I
figure out which ones I want to keep and put them into my new output
content, but I am missing all of the delimiters. I tried putting spaces
between all the tokens in a command and eol at the end. This still wasn't
right because there are other delimiters also like parenthesis, (). So
how do I get to the original content once I use PdfContentParser to parse
and identify the lines I want to remove or more correctly to the original
content for the command lines I want to keep? Any ideas would be greatly
appreciated.
Thanks,
Doug
________
Carl Zeiss Meditec, Inc.
Research and Development
Senior Staff Software Engineer
5160 Hacienda Drive
Dublin, CA 94568
D o u g L i m
Phone: +1 925.557.4453
Fax: +1 925.557.4615
mailto:[EMAIL PROTECTED]
http://www.meditec.zeiss.com
[EMAIL PROTECTED] wrote on 10/16/2008 02:07:30
PM:
>
> Thanks! I think I am close to getting it working, but right now I
> get a message from all the viewers that there is an error in my PDF.
> Here is my code. Does anyone see something obvious that I am missing?
>
> Thanks Doug
>
> import com.lowagie.text.DocumentException;
> import com.lowagie.text.pdf.PRTokeniser;
> import com.lowagie.text.pdf.PdfContentParser;
> import com.lowagie.text.pdf.PdfNumber;
> import com.lowagie.text.pdf.PdfObject;
> import com.lowagie.text.pdf.PdfReader;
> import com.lowagie.text.pdf.PdfStamper;
> import com.lowagie.text.pdf.PdfString;
> import com.lowagie.text.pdf.PdfWriter;
>
> import java.io.FileOutputStream;
> import java.io.IOException;
> import java.util.ArrayList;
> import java.util.logging.Level;
> import java.util.logging.Logger;
>
> /**
> *
> * @author dlim
> */
> public class ReadAndRewrite {
> /** buffer to build new content to output */
> private ArrayList<Byte> outputContent = new ArrayList<Byte>();
>
>
> public void addToContent(byte[] array) {
> for (byte element: array) {
> this.outputContent.add(element);
> }
> }
>
> public void addToContent(PdfObject pdfObject) {
> addToContent(pdfObject.getBytes());
> }
> public void addToContent(String string) {
> addToContent( new PdfString(string) );
> }
>
> public void convert() {
> try {
> PdfReader reader = new PdfReader("Glaucoma.pdf");
> FileOutputStream fileOutputStream = new
> FileOutputStream("FixedGlaucoma.pdf");
> PdfStamper pdfStamper = new PdfStamper(reader,
fileOutputStream);
>
> byte[] content = reader.getPageContent(1);
>
> // debug - show the content stream
> for (byte letter : content) {
> System.out.print((char)letter);
> }
>
> // TEST the unmodified content out. <= this works
> // reader.setPageContent(1, content);
> // pdfStamper.close();
> // System.exit(0);
>
> String cmd;
> boolean lastCmdET = false;
> PdfContentParser contentParser = new
> PdfContentParser(new PRTokeniser(content));
> ArrayList<PdfObject> tokens = new ArrayList<PdfObject>();
> byte[] space = new PdfString(" ").getBytes();
> byte[] eol = new PdfString("\n").getBytes();
>
> System.out.println("=== Parsed lines ===");
>
> contentParser.parse(tokens);
>
> while ( !tokens.isEmpty() ) {
> for (PdfObject value: tokens) {
> System.out.print(value + " ");
> }
>
> System.out.println();
>
> cmd = tokens.get(tokens.size() - 1).toString();
>
> if (!lastCmdET || !"h".equals(cmd)) {
> // not an 'h' following an 'ET'
> for (PdfObject value: tokens) {
> addToContent(value);
> }
> } else {
> System.out.println("DEBUG: h command removed.");
> }
>
> if ( "ET".equals(cmd) ) {
> System.out.println("DEBUG: ET last set.");
> lastCmdET = true;
> } else {
> lastCmdET = false;
> }
>
> contentParser.parse(tokens);
> }
>
> byte[] finalContent = new byte[this.outputContent.size()];
>
> for (int i = 0; i < this.outputContent.size(); ++i) {
> finalContent[i] = this.outputContent.get(i);
> }
>
> reader.setPageContent(1, finalContent);
> pdfStamper.close();
> } catch (DocumentException ex) {
> Logger.getLogger(ReadAndRewrite.class.getName()).
> log(Level.SEVERE, null, ex);
> } catch (IOException ex) {
> Logger.getLogger(ReadAndRewrite.class.getName()).
> log(Level.SEVERE, null, ex);
> }
> }
>
> public static void main(String args[]) {
> ReadAndRewrite readAndRewrite = new ReadAndRewrite();
> readAndRewrite.convert();
> }
> }
>
> ----- Original Message -----
>
> You'll need PdfStamper for the output, PdfReader.getPageContent(),
> PdfReader.setPageContent() and PdfContentParser.
>
> Paulo
>
> ----- Original Message -----
> From: "Lim, Doug" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Saturday, October 11, 2008 1:54 AM
> Subject: [iText-questions] Editing PDF Stream
>
>
>
> Hi,
>
> I will apologize up-front. I am a complete newbie to iText and PDF
files.
> The problem I am trying to solve is that I have a bunch of PDF files
that
> are incorrectly formed. They can be read and viewed by Adobe Reader 9,
but
> not by our embedded PDF reader. The error in the PDF file can be
> characterized by an "h" (close subpath) command immediately following an
> "ET" (end text) command in a stream. Using a commercial PDF editor we
can
> delete all of the "h" commands that immediately follow an "ET" command
and
> our reader can read the documents. The short term solution I am trying
to
> implement is to remove any "h" commands immediately following the "ET"
> command programmatically. Is iText the right tool for solving this
problem?
> If not can anyone suggest another tool or approach to solving this
problem?
>
> Thanks,
> Doug
>
>
> Thanks,
> Doug
> ________
>
> Carl Zeiss Meditec, Inc.
> Research and Development
> Senior Staff Software Engineer
> 5160 Hacienda Drive
> Dublin, CA 94568
>
> D o u g L i m
>
> Phone: +1 925.557.4453
> Fax: +1 925.557.4615
> mailto:[EMAIL PROTECTED]
> http://www.meditec.zeiss.com
>
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