Correct the page layout in Raj Kamal book, available on the internet.

RajKamalBookCorrectPages.java

import java.io.FileOutputStream;
import java.io.IOException;

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfNumber;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;

/**
 *	A simple class to fix the RajKamal eBook that is available on the internet.
 *
 *	@author Ashwanth Kumar <ashwanth@ashwanthkumar.in>
 *	@date 29/11/2011
 *
 *      $ javac -cp .;itextpdf-5.1.3.jar RajKamalBookCorrectPages.java
 *      $ java -cp .;itextpdf-5.1.3.jar RajKamalBookCorrectPages
 **/
public class RajKamalBookCorrectPages {
    /**
     * Manipulates the PDF file with src as original err'd book path and dest as the correct'd book path
     * @param src the original PDF
     * @param dest the resulting PDF
     * @throws IOException
     * @throws DocumentException
     */
    public void correctRajKamalSecondEditionBook(String src, String dest)
        throws IOException, DocumentException {
        PdfReader reader = new PdfReader(src);
        int n = reader.getNumberOfPages();
        int rot;
        PdfDictionary pageDict;
		
	// Rotate all the even pages on the book
        for (int i = 2; i <= n;) {
            rot = reader.getPageRotation(i);
            pageDict = reader.getPageN(i);
            pageDict.put(PdfName.ROTATE, new PdfNumber(rot + 180));
			i += 2;
        }

	// try to correct the landscape view to Portrait
        for (int i = 1; i <= n; i++) {
            rot = reader.getPageRotation(i);
            pageDict = reader.getPageN(i);
            pageDict.put(PdfName.ROTATE, new PdfNumber(rot - 90));
        }
		
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
        stamper.close();
    }

	public static void main(String args[]) {
		try {
			new RajKamalBookCorrectPages().correctRajKamalSecondEditionBook("./EmbeddedSystems_RajKamal.pdf", "./corrected_Embedded_Systems_RajKamal.pdf");
		} catch (Exception e) {
			System.out.println("error " + e.getMessage());
		}
	}
}