/**
 * Example written by Bruno Lowagie in answer to:
 * http://stackoverflow.com/questions/23280083/itextsharp-change-order-of-optional-content-groups
 */
package sandbox.stamper;

import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfLayer;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Map;
import sandbox.WrapToTest;

@WrapToTest
public class ChangeOCG {

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

    public static void main(String[] args) throws IOException, DocumentException {
        File file = new File(DEST);
        file.getParentFile().mkdirs();
        new ChangeOCG().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<String, PdfLayer> layers = stamper.getPdfLayers();
        PdfLayer layer = layers.get("Nested layer 1");
        layer.setOn(false);
        stamper.close();
        reader.close();
    }

}