pdfa/clone_pdfa

 *

 * Clone PDF/A and PDF/X standard documents

 * This is useful as basis for additional processing,

 * such as stamping, adding XMP metadata, adding page content, etc.

 *

 * The following aspects of the input document will be cloned:

 * - PDF/A and PDF/X version (if supported by PDFlib)

 *   The following standards can not be cloned: PDF/A-1a:2005 and PDF/X-5n.

 * - output intent (if present)

 *   Referenced output intents for PDF/X-4p and PDF/X-5pg will also

 *   be cloned.

 * - page geometry, i.e. all page boxes and Rotate key

 *   Referenced external pages for PDF/X-5g and PDF/X-5pg will also

 *   be cloned.

 * - XMP document metadata

 *

 * To demonstrate coordinate transformations which may be required

 * to add new page content this topic adds a stamp across all pages.

 *

 * Input documents may conform to PDF/A and PDF/X simultaneously.

 *

 * Note: Except for the names of the input and output documents this is an exact

 * copy of example com.pdflib.cookbook.pdflib.pdfx.clone_pdfx. It is included

 * twice for being easily found under the PDF/A and PDF/X categories.

 *

 * required software: PDFlib/PDFlib+PDI/PPS 8 or above

 * required data: PDF/A or PDF/X input document

 */

package com.pdflib.cookbook.pdflib.pdfa;

import com.pdflib.pdflib;

import com.pdflib.PDFlibException;

public class clone_pdfa {

    public static void main(String argv[]) {

        /* This is where the data files are. Adjust as necessary. */

        String searchpath = "../input";

        pdflib p = null;

        String pdfinputfile = "PLOP-datasheet-PDFA-1b.pdf";

        String pdfxversion, pdfaversion;

        String optlist = "";

        byte xmp[];

        boolean clonemetadata = true;

        /* The following standard flavors can be cloned: */

        String supportedflavors[] = { "PDF/A-1b:2005", "PDF/X-1a:2001",

            "PDF/X-1a:2003", "PDF/X-3:2002", "PDF/X-3:2003", "PDF/X-4",

            "PDF/X-4p", "PDF/X-5g", "PDF/X-5pg", "none" };

        int font, indoc, page, endpage, pageno, i;

        double x, y, phi, width, height;

        try {

            p = new pdflib();

            p.set_parameter("SearchPath", searchpath);

            /* This means we must check return values of load_font() etc. */

            p.set_parameter("errorpolicy", "return");

            /* Open the input PDF */

            indoc = p.open_pdi_document(pdfinputfile, "");

            if (indoc == -1) {

                throw new Exception("Error: " + p.get_apiname() + ": "

                        + p.get_errmsg());

            }

            /*

             * Read PDF/X and PDF/A version of the input document

             */

            pdfxversion = p.pcos_get_string(indoc, "pdfx");

            pdfaversion = p.pcos_get_string(indoc, "pdfa");

            for (i = 0; i < supportedflavors.length; i++) {

                if (pdfxversion.equals(supportedflavors[i])) {

                    optlist += " pdfx=" + pdfxversion;

                    break;

                }

            }

            if (i == supportedflavors.length)

                throw new Exception("Error: Cannot clone " + pdfxversion

                        + " documents");

            for (i = 0; i < supportedflavors.length; i++) {

                if (pdfaversion.equals(supportedflavors[i])) {

                    optlist += " pdfa=" + pdfaversion;

                    break;

                }

            }

            if (i == supportedflavors.length)

                throw new Exception("Error: Cannot clone " + pdfaversion

                        + " documents");

            /*

             * Create a new document and clone PDF/A and PDF/X version

             */

            if (p.begin_document("clone_pdfa.pdf", optlist) == -1)

                throw new Exception("Error: " + p.get_apiname() + ": "

                        + p.get_errmsg());

            p.set_info("Creator", "PDFlib Cookbook");

            p.set_info("Title", "clone_pdfx");

            /*

             * Clone PDF/X output intent

             */

            p.process_pdi(indoc, -1, "action=copyoutputintent");

            endpage = (int) p.pcos_get_number(indoc, "length:pages");

            /* Copy all pages of the input document */

            for (pageno = 1; pageno <= endpage; pageno++) {

                String lowerleftcorner[][] = {

                        { "x1", "y1" }, /* 0 degrees */

                        { "x2", "y2" }, /* 90 degrees */

                        { "x3", "y3" }, /* 180 degrees */

                        { "x4", "y4" }, /* 270 degrees */

                };

                page = p.open_pdi_page(indoc, pageno, "cloneboxes");

                if (page == -1) {

                    System.err.println("Error: " + p.get_errmsg());

                    continue;

                }

                /* Dummy page size; will be adjusted by "cloneboxes" option */

                p.begin_page_ext(10, 10, "");

                /*

                 * Query the geometry of the cloned page. This is required to

                 * account for translated or rotated pages if we want to add

                 * more contents to the page.

                 */

                phi = p.info_pdi_page(page, "rotate", "");

                /*

                 * Select the lower left corner depending on the rotation angle

                 */

                x = p.info_pdi_page(page, lowerleftcorner[(int) (phi / 90)][0],

                        "");

                y = p.info_pdi_page(page, lowerleftcorner[(int) (phi / 90)][1],

                        "");

                /*

                 * Place the imported page on the output page and clone all page

                 * boxes

                 */

                p.fit_pdi_page(page, 0, 0, "cloneboxes");

                /* Font embedding is required for PDF/X */

                font = p.load_font("LuciduxSans-Oblique", "unicode",

                        "embedding");

                if (font == -1)

                    throw new Exception("Error: " + p.get_apiname() + ": "

                            + p.get_errmsg());

                p.setfont(font, 24);

                /*

                 * Adjust the coordinate system to facilitate adding new page

                 * content on top of the cloned page.

                 */

                p.translate(x, y);

                p.rotate(phi);

                width = p.info_pdi_page(page, "pagewidth", "");

                height = p.info_pdi_page(page, "pageheight", "");

                /*

                 * Add some text on each page. PDFlib will automatically set the

                 * default black color in a standard-conforming way.

                 */

                p.fit_textline("Cloned page", 0, 0,

                        "textrendering=1 stamp=ll2ur boxsize={" + width + " "

                                + height + "}");

                p.close_pdi_page(page);

                p.end_page_ext("");

            }

            /*

             * Clone XMP metadata if applicable

             */

            /*

             * These old flavors are based on PDF 1.3 which doesn't support XMP

             * metadata

             */

            if (pdfxversion.equals("PDF/X-1a:2001")

                    || pdfxversion.equals("PDF/X-3:2002")) {

                clonemetadata = false;

            }

            if (clonemetadata

                    && p.pcos_get_string(indoc, "type:/Root/Metadata").equals(

                            "stream")) {

                xmp = p.pcos_get_stream(indoc, "", "/Root/Metadata");

                p.create_pvf("/xmp/document.xmp", xmp, "");

                optlist = "metadata={filename=" + "/xmp/document.xmp" + "}";

            }

            else {

                optlist = "";

            }

            p.end_document(optlist);

            p.delete_pvf("/xmp/document.xmp");

            p.close_pdi_document(indoc);

        }

        catch (PDFlibException e) {

            System.err.print("PDFlib exception occurred:\n");

            System.err.print("[" + e.get_errnum() + "] " + e.get_apiname()

                    + ": " + e.get_errmsg() + "\n");

        }

        catch (Exception e) {

            System.err.println(e.getMessage());

        }

        finally {

            if (p != null) {

                p.delete();

            }

        }

    }

}