Multiplies pages inside a PDF file, requires iText 2.0.8

2008_02_23-pdf_multiplier.java

/*
 * To compile and run:
 *
 * javac -classpath MultiplyPDF.java
 * java -classpath iText-2.0.8.jar MultiplyPDF
 *
 */
import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.PageSize;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class MultiplyPDF {
    public static void main(String[] args) {
    	 // Process arguments
    	if(args.length < 3) {
    		System.err.println("ERROR: Insufficient arguments!");
    		System.err.println("USAGE: [input] [output] [multiply factor]");
    		System.exit(1);
    	}    	
    	String strInput = args[0];
    	String strOutput = args[1];
        int intFactor = new Integer(args[2]).intValue();
        
    try {
    	// Setup files
    	PdfReader inputReader = new PdfReader(strInput);    	
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    	int maxPageNum = inputReader.getNumberOfPages();
    	    	
    	// Print info
    	System.out.println("Transforming " + strInput + " to " + strOutput);
        System.out.println("Factor = " + intFactor);
        
    	// Open output
        Document document = new Document(inputReader.getPageSize(maxPageNum-1));
        PdfCopy copier = new PdfCopy(document, outputStream);        
        document.open();
        
        // Transform
        for (int page=1;page<=maxPageNum;page++){
            for(int j=1;j<=intFactor;j++) {
                copier.addPage(copier.getImportedPage(inputReader, page));
                System.out.println("Page= " + page + ", j= " + j);
            }
        }

        // Write output
        document.close();
        FileOutputStream output = new FileOutputStream(strOutput);
        output.write(outputStream.toByteArray());
        output.close();
        
    }catch(Exception ex){
        ex.printStackTrace();
        System.exit(1);
    }
        // Finish
    System.out.println("done!");
    System.exit(0);
    }
}