pdfa/pdfa_extension_schema

 * PDF/A extension schema:

 * Demonstrate the use of an XMP extension schema as defined in PDF/A-1

 *

 * Create a PDF/A document and use the "metadata" option of begin_document() to

 * supply an XMP file containing an XMP extension schema.

 *

 * Required software: PDFlib/PDFlib+PDI/PPS 7.0.3

 * Required data: XMP file

 */

package com.pdflib.cookbook.pdflib.pdfa;

import com.pdflib.pdflib;

import com.pdflib.PDFlibException;

public class pdfa_extension_schema {

    public static void main(String argv[]) {

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

        String searchpath = "../input";

        String outfile = "pdfa_extension_schema.pdf";

        String title = "PDF/A Extension Schema";

        pdflib p = null;

        String xmpfile = "machine_extension_schema_1.xmp";

        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");

            check_pdflib_version(p, 7, 0, 4);

            /*

             * Start a PDF/A document with an XMP file supplied, containing an

             * XMP extension schema. The XMP metadata will be read from the file

             * and embedded in the document. PDFlib will merge several

             * internally generated entries into the user-supplied XMP, e.g.

             * xmp:CreateDate.

             */

            if (p.begin_document(outfile,

                    "pdfa=PDF/A-1b:2005 metadata={filename={" + xmpfile + "}}")

                                                                        == -1)

                throw new Exception("Error: " + p.get_errmsg());

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

            p.set_info("Title", title + " $Revision: 1.1.2.3 $");

            p.begin_page_ext(0, 0, "width=a4.height height=a4.width");

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

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

                                                            "embedding");

            if (font == -1)

                throw new Exception("Error: " + p.get_errmsg());

            p.setfont(font, 12);

            p.fit_textline(

                    "An XMP extension schema is read from an XMP file and "

                            + "the XMP metadata is embedded in the document.",

                    50, 400, "");

            p.end_page_ext("");

            p.end_document("");

        }

        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();

            }

        }

    }

    /**

     * Check whether the required minimum PDFlib version is available

     *

     * @param p

     *            the pdflib object

     * @param major

     *            PDFlib major version number

     * @param minor

     *            PDFlib minor version number

     * @param revision

     *            PDFlib revision number

     *

     * @throws PDFlibException

     * @throws Exception

     */

    private static void check_pdflib_version(pdflib p, int major, int minor,

            int revision) throws PDFlibException, Exception {

        final int actualMajor = (int) p.get_value("major", 0);

        final int actualMinor = (int) p.get_value("minor", 0);

        final int actualRevision = (int) p.get_value("revision", 0);

        /* Required minimum PDFlib version */

        final int requiredVersion = major * 100 + minor * 10 + revision;

        final int actualVersion = actualMajor * 100 + actualMinor * 10

                + actualRevision;

        if (actualVersion < requiredVersion) {

            throw new Exception("Error: PDFlib " + major + "." + minor + "."

                    + revision + " or above is required");

        }

    }

}