Best effort to copy everything from a secured PDF to a new PDF

Unsecure.java

package org.foo.unsecure;

import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.List;

import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfObject;
import com.itextpdf.text.pdf.PdfPageLabels;
import com.itextpdf.text.pdf.PdfPageLabels.PdfPageLabelFormat;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.SimpleBookmark;
import com.itextpdf.text.pdf.internal.PdfViewerPreferencesImp;

/**
 * Best effort to copy everything from a secured PDF to a new PDF
 * 
 * <pre>
 * {@code
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>itextpdf</artifactId>
    <version>5.5.0</version>
</dependency>

<dependency>
	<groupId>org.bouncycastle</groupId>
	<artifactId>bcprov-jdk15on</artifactId>
	<version>1.70</version>
</dependency>
 * }
 * </pre>
 */
public class Unsecure {

    public static void main(final String[] args) throws Exception {

        PdfReader.unethicalreading = true; // allow extract everything

        final PdfReader reader = new PdfReader(args[0]);
        final FileOutputStream os = new FileOutputStream(args[1]);

        final Document document = new Document(reader.getPageSizeWithRotation(1));
        
        // preserve Roman page numbers
		PdfPageLabels pageLabels = null;
		final PdfPageLabelFormat[] pageLabelFormats = PdfPageLabels.getPageLabelFormats(reader);
		if (pageLabelFormats != null) {
			pageLabels = new PdfPageLabels();
			for (final PdfPageLabelFormat format : pageLabelFormats) {
				pageLabels.addPageLabel(format);
			}
		}

        // preserve bookmarks
        final List<HashMap<String, Object>> bookmarks = SimpleBookmark.getBookmark(reader);
        
        // preserve title
        final PdfObject title = reader.getTrailer().getAsDict(PdfName.INFO).get(PdfName.TITLE);
        
        // preserve ViewerPreferences
        final int simpleVp = reader.getSimpleViewerPreferences();
        final PdfViewerPreferencesImp vp = PdfViewerPreferencesImp.getViewerPreferences(reader
                .getCatalog());
        
        final PdfCopy copy = new PdfCopy(document, os);
        document.open();
        
        // copy automatically
        copy.addDocument(reader);
        
        copy.setOutlines(bookmarks);

        if (pageLabels != null) {
        	copy.setPageLabels(pageLabels);
        }

        if (title != null) {
            copy.getInfo().put(PdfName.TITLE, title);
        }

        copy.setViewerPreferences(simpleVp);
        final PdfDictionary vpdict = vp.getViewerPreferences();
        for (final PdfName key : vpdict.getKeys()) {
            final PdfObject value = vpdict.get(key);
            copy.addViewerPreference(key, value);
        }

        document.close();
    }
}