pCOS（PDF 情報）の取得

import java.io.*;
import com.pdflib.pdflib;
import com.pdflib.PDFlibException;

public class starter_pcos
{
  public static void main (String argv[])
  {
    /* データファイルの場所です。必要なように適合させます */
    String searchpath = "../data";

    pdflib p = null;
    String pdfinput = "TET-datasheet.pdf";

    final String	docoptlist = "requiredmode=minimum";
    int	count, pcosmode;
    int	i, doc;
    String	objtype;

    try {
      p = new pdflib();

      p.set_parameter("SearchPath", searchpath);

      /* load_font()等からの戻り値を調べなければいけないことを
       * 表しています。
       */
      p.set_parameter("errorpolicy", "return");

      /* 出力ドキュメントを作らないので、begin_document()の呼び出しは
       * 必要ありません。
       */

      /* 入力ドキュメントを開きます */
      if ((doc = p.open_pdi_document(pdfinput, docoptlist)) == -1)
        throw new Exception("Error: " + p.get_errmsg());

      /* --------- 一般的な情報 (いつでも利用可能) */

      pcosmode = (int) p.pcos_get_number(doc, "pcosmode");

      System.out.println("   File name: " + 
        p.pcos_get_string(doc,"filename"));

      System.out.println(" PDF version: " +
        p.pcos_get_number(doc, "pdfversion")/10);

      System.out.println("  Encryption: " +
        p.pcos_get_string(doc, "encrypt/description"));

      System.out.println("   Master pw: " +
        ((p.pcos_get_number(doc, "encrypt/master") != 0) ? "yes":"no"));

      System.out.println("     User pw: " +
        ((p.pcos_get_number(doc, "encrypt/user") != 0) ? "yes" : "no"));

      System.out.println("Text copying: " +
        ((p.pcos_get_number(doc, "encrypt/nocopy") != 0) ? "no":"yes"));

      System.out.println("  Linearized: " +
        ((p.pcos_get_number(doc, "linearized") != 0) ? "yes" : "no"));

      System.out.println("      Tagged: " +
        ((p.pcos_get_number(doc, "tagged") != 0) ? "yes" : "no") +"\n");

      if (pcosmode == 0)
      {
        System.out.println("Minimum mode:" +
                           "no more information available\n");
        p.delete();
        System.exit(0);
      }

      /* --------- 具体的な詳細 (少なくともユーザーパスワードが必要） */
      System.out.println("No. of pages: " +
        (int) p.pcos_get_number(doc, "length:pages"));

      System.out.println(" Page 1 size: width=" +
        (int) p.pcos_get_number(doc, "pages[0]/width") + ", height=" +
        (int) p.pcos_get_number(doc, "pages[0]/height"));

      count = (int) p.pcos_get_number(doc, "length:fonts");
      System.out.println("No. of fonts: " +  count);

      for (i=0; i < count; i++)
      {
        String fonts;

        fonts = "fonts[" + i + "]/embedded";
        if (p.pcos_get_number(doc, fonts) != 0)
          System.out.print("embedded ");
        else
          System.out.print("unembedded ");

        fonts = "fonts[" + i + "]/type";
        System.out.print(p.pcos_get_string(doc, fonts) + " font ");
        fonts = "fonts[" + i + "]/name";
        System.out.println(p.pcos_get_string(doc, fonts));
      }

      System.out.println("");

      if (pcosmode == 1)
      {
        System.out.print(
          "Restricted mode: no more information available");
        p.delete();
        System.exit(0);
      }

      /* ---------ドキュメント情報のキーとXMPメタデータ
       *           (所有者のパスワードが必要)
       */

      count = (int) p.pcos_get_number(doc, "length:/Info");

      for (i=0; i < count; i++)
      {
        String info;
        String key;
        int len;

        info = "type:/Info[" + i + "]";
        objtype = p.pcos_get_string(doc, info);

        info = "/Info[" + i + "].key";
        key = p.pcos_get_string(doc, info);
        len = 12 - key.length();
        while (len-- > 0) System.out.print(" ");

        System.out.print(key + ": ");

        /* 入力情報は文字列や名前のオブジェクトを保存できます */
        if (objtype.equals("name") || objtype.equals("string"))
        {
          info = "/Info[" + i + "]";
          System.out.println("'" + p.pcos_get_string(doc, info) + "'");
        }
        else
        {
          info = "type:/Info[" + i + "]";
          System.out.println("(" + p.pcos_get_string(doc, info) +
          " object)");
        }
      }

      System.out.print("\n" + "XMP meta data: ");


      objtype = p.pcos_get_string(doc, "type:/Root/Metadata");
      if (objtype.equals("stream"))
      {
        byte[] contents;
        int len;

        contents = p.pcos_get_stream(doc, "", "/Root/Metadata");
        System.out.print(contents.length + " bytes ");
        System.out.println("");
      }
      else
      {
        System.out.println("not present");
      }

      p.close_pdi_document(doc);

    } 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();
      }
    }
  }
}