Paulo,
The code below has solved the problem and I have switched from
PdfCopy to PdfStamper for output.
iText has proven to be very versatile and reliable for solving our pdf
problems.
Thanks again,
Greg Sabatino
On Apr 13, 2005, at 5:40 AM, Paulo Soares wrote:
This should work. Use PdfStamper to get the result out.
import java.io.*;
import java.awt.Color;
import com.lowagie.text.*;
import com.lowagie.text.pdf.*;
import java.util.*;
public class metadata {
public static void main(String[] args) {
try {
PdfReader reader = new
PdfReader("C:\\downloads\\XMP_for_CreativePros2004.pdf");
removeMetadata(reader);
}
catch(Exception de) {
de.printStackTrace();
}
}
public static void removeMetadata(PdfReader reader) {
boolean hits[] = new boolean[reader.getXrefSize()];
removeMetadataNode(reader.getTrailer(), hits);
hits = null;
reader.removeUnusedObjects();
}
private static void removeMetadataNode(PdfObject obj, boolean
hits[]) {
if (obj == null)
return;
switch (obj.type()) {
case PdfObject.DICTIONARY:
case PdfObject.STREAM: {
PdfDictionary dic = (PdfDictionary)obj;
for (Iterator it = dic.getKeys().iterator();
it.hasNext();) {
PdfName key = (PdfName)it.next();
if (key.equals(PdfName.METADATA)) {
System.out.println("Metadata found");
it.remove();
continue;
}
PdfObject v = dic.get(key);
removeMetadataNode(v, hits);
}
break;
}
case PdfObject.ARRAY: {
ArrayList list = ((PdfArray)obj).getArrayList();
for (int k = 0; k < list.size(); ++k) {
PdfObject v = (PdfObject)list.get(k);
removeMetadataNode(v, hits);
}
break;
}
case PdfObject.INDIRECT: {
PRIndirectReference ref = (PRIndirectReference)obj;
int num = ref.getNumber();
if (!hits[num]) {
hits[num] = true;
removeMetadataNode(PdfReader.getPdfObject(ref),
hits);
}
}
}
}
}
-----Original Message-----
From: Greg Sabatino [mailto:[EMAIL PROTECTED]
Sent: Tuesday, April 12, 2005 10:06 PM
To: Paulo Soares
Subject: Re: [iText-questions] Need to strip all XMP metadata
when using PdfCopy
Thanks for that reply Paulo. I know that you are busy and I
appreciate
your answering me. I am a novice when it comes to pdf processing
and have found iText to be terrific so far. You and Bruno have done
some
excellent work! I am hoping that I can ask you to take one more look
at this.
I looked at PdfReader.removeUnusedObjects() and came up
with the code below. It doesn't seem to find any streams or Metadata
embedded
in an example pdf file found at
http://www.adobe.com/products/xmp/pdfs/XMP_for_CreativePros2004.pdf
What did I miss?
Thanks again,
Greg Sabatino
public void removeMetadata(PdfReader reader) {
removeMetadataNode(reader.getTrailer());
reader.removeUnusedObjects();
}
private void removeMetadataNode(PdfObject obj) {
if (obj == null) return;
System.out.println("*Looking at obj " + obj);
if(obj.isDictionary() || obj.isStream()){
System.out.println("*Looking for metadata.* " + obj);
PdfDictionary dic = (PdfDictionary)obj;
if(dic.contains(PdfName.METADATA))
System.out.println("*Found metadata.*");
dic.remove(PdfName.METADATA);
for (Iterator it = dic.getKeys().iterator();
it.hasNext();)
{
PdfName key = (PdfName)it.next();
System.out.println("Key" + key);
PdfObject v = dic.get(key);
removeMetadataNode(v);
}
}
} On Apr 12, 2005, at 11:50 AM, Paulo Soares wrote:
That's quite easy. Look at the source of
PdfReader.removeUnsusedObjects() and get what you need to
reach all the
pdf objects. If the PdfObject is a dictionary or a prstream use
remove(PdfName.METADATA). Finally to clean up what was removed call
PdfReader.removeUnsusedObjects().
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Greg Sabatino
Sent: Tuesday, April 12, 2005 4:27 PM
To: [email protected]
Subject: [iText-questions] Need to strip all XMP metadata
when using PdfCopy
Hello, I am using PdfCopy to copy existing pdf's but need a
way to positively remove any XMP metadata. As a first attempt
I am using "reader.getCatalog().remove(PdfName.METADATA)"
prior to creating a new Document using the reader. This seems
to work just fine but I see in the PDF spec that XMP metadata
can be contained in any components that are represented as a
stream or dictionary. Does anyone know if there as a way to
find and remove all those metadata streams if they exist
anywhere in the document? Thanks, Greg
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