/*
 * Example written by Bruno Lowagie in answer to a question on SO
 */
package sandbox.stamper;

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfDate;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.xml.xmp.XmpWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Map;

/**
 * @author iText
 */
public class ChangeMetadata {

    public static final String SRC = "resources/pdfs/state.pdf";
    public static final String DEST = "results/stamper/state_metadata.pdf";

    public static void main(String[] args) throws IOException, DocumentException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new ChangeMetadata().manipulatePdf(SRC, DEST);
    }
       
    public void manipulatePdf(String src, String dest) throws IOException, DocumentException {
        PdfReader reader = new PdfReader(src);
        PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
        Map info = reader.getInfo();
        info.put("Title", "New title");
        info.put("CreationDate", new PdfDate().toString());
        stamper.setMoreInfo(info);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        XmpWriter xmp = new XmpWriter(baos, info);
        xmp.close();
        stamper.setXmpMetadata(baos.toByteArray());
        stamper.close();
        reader.close();
    }
}