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pdf_import/split_document

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/*

 * $Id: split_document.java,v 1.1 2013/01/17 12:58:38 stm Exp $

 *

 * Split PDF document:

 * Split PDF document in seperate output documents where each output

 * document contains a range of one or more pages from the input document.

 *

 * Interactive elements (e.g. bookmarks) will be dropped.

 *

 * Required software: PDFlib+PDI/PPS 9

 * Required data: PDF input document

 */


package com.pdflib.cookbook.pdflib.pdf_import;


import com.pdflib.pdflib;

import com.pdflib.PDFlibException;


public class split_document {

    public static void main(String argv[]) {

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

        String searchpath = "../input";

        String outfile_basename = "split_document";

        String title = "Split PDF Document";

        String infile = "PDFlib-datasheet.pdf";


        /*

         * Document will be split into sub-documents where each document has

         * this many pages (except the last sub-document potentially).

         */

        final int SUBDOC_PAGES = 2;


        pdflib p = null;


        try {

            p = new pdflib();


            p.set_option("searchpath={" + searchpath + "}");


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

            p.set_option("errorpolicy=return");


            int indoc = p.open_pdi_document(infile, "");

            if (indoc == -1)

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


            /*

             * Determine the number of pages in the input document and compute

             * the number of output documents.

             */

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

            int outdoc_count = page_count / SUBDOC_PAGES

                    + (page_count % SUBDOC_PAGES > 0 ? 1 : 0);


            for (int outdoc_counter = 0, page = 0;

                    outdoc_counter < outdoc_count; outdoc_counter += 1) {

                String outfile = outfile_basename + "_" + (outdoc_counter + 1)

                    + ".pdf";


                /*

                 * Open new sub-document.

                 */

                if (p.begin_document(outfile, "") == -1)

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


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

                p.set_info("Title", title + " $Revision: 1.1 $");

                p.set_info("Subject", "Sub-document " + (outdoc_counter + 1)

                    + " of " + outdoc_count + " of input document '" + infile

                    + "'");


                for (int i = 0; page < page_count && i < SUBDOC_PAGES;

                                                    page += 1, i += 1) {

                    /* Dummy page size; will be adjusted later */

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


                    int pagehdl = p.open_pdi_page(indoc, page + 1, "");

                    if (pagehdl == -1)

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


                    /*

                     * Place the imported page on the output page, and adjust

                     * the page size

                     */

                    p.fit_pdi_page(pagehdl, 0, 0, "adjustpage");

                    p.close_pdi_page(pagehdl);


                    p.end_page_ext("");

                }


                /* Close the current sub-document */

                p.end_document("");

            }


            /* Close the input document */

            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();

            }

        }

    }

}