Package com.lowagie.toolbox.plugins

Source Code of com.lowagie.toolbox.plugins.Concat

/*
* $Id$
* Copyright (c) 2005-2007 Bruno Lowagie, Carsten Hammer, Paulo Soares
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/

/*
* This class was originally published under the MPL by Bruno Lowagie,
* Paulo Soares and Carsten Hammer.
* It was a part of iText, a Java-PDF library. You can now use it under
* the MIT License; for backward compatibility you can also use it under
* the MPL version 1.1: http://www.mozilla.org/MPL/
* A copy of the MPL license is bundled with the source code FYI.
*/
package com.lowagie.toolbox.plugins;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import javax.swing.JInternalFrame;

import com.lowagie.text.LwgDocument;
import com.lowagie.text.pdf.PdfCopy;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.SimpleBookmark;
import com.lowagie.toolbox.AbstractTool;
import com.lowagie.toolbox.arguments.AbstractArgument;
import com.lowagie.toolbox.arguments.FileArgument;
import com.lowagie.toolbox.arguments.filters.PdfFilter;

/**
* Concatenates two PDF files
* @since 2.1.1 (imported from itexttoolbox project)
*/
public class Concat extends AbstractTool
{

   static
   {
      addVersion("$Id$");
   }

   /**
    * Constructs a Concat object.
    */
   public Concat()
   {
      menuoptions = MENU_EXECUTE | MENU_EXECUTE_SHOW;
      arguments.add(new FileArgument(this, "srcfile1", "The first PDF file", false, new PdfFilter()));
      arguments.add(new FileArgument(this, "srcfile2", "The second PDF file", false, new PdfFilter()));
      arguments.add(new FileArgument(this, "destfile", "The file to which the concatenated PDF has to be written", true, new PdfFilter()));
   }

   /**
    * @see com.lowagie.toolbox.AbstractTool#createFrame()
    */
   protected void createFrame()
   {
      internalFrame = new JInternalFrame("Concatenate 2 PDF files", true, false, true);
      internalFrame.setSize(300, 80);
      internalFrame.setJMenuBar(getMenubar());
      System.out.println("=== Concat OPENED ===");
   }

   /**
    * @see com.lowagie.toolbox.AbstractTool#execute()
    */
   public void execute()
   {
      try
      {
         String[] files = new String[2];
         if (getValue("srcfile1") == null)
            throw new InstantiationException("You need to choose a first sourcefile");

         files[0] = ((File) getValue("srcfile1")).getAbsolutePath();

         if (getValue("srcfile2") == null)
            throw new InstantiationException("You need to choose a second sourcefile");
        
         files[1] = ((File) getValue("srcfile2")).getAbsolutePath();
        
         if (getValue("destfile") == null)
            throw new InstantiationException("You need to choose a destination file");
        
         File pdf_file = (File) getValue("destfile");
         int pageOffset = 0;
         List<HashMap<String, Object>> master = new ArrayList<HashMap<String, Object>>();
         LwgDocument document = null;
         PdfCopy writer = null;
         for (int i = 0; i < 2; i++)
         {
            // we create a reader for a certain document
            PdfReader reader = new PdfReader(files[i]);
            reader.consolidateNamedDestinations();
            // we retrieve the total number of pages
            int n = reader.getNumberOfPages();
            List<HashMap<String, Object>> bookmarks = SimpleBookmark.getBookmark(reader);
            if (bookmarks != null)
            {
               if (pageOffset != 0)
                  SimpleBookmark.shiftPageNumbers(bookmarks, pageOffset, null);
               master.addAll(bookmarks);
            }
            pageOffset += n;
            System.out.println("There are " + n + " pages in " + files[i]);
            if (i == 0)
            {
               // step 1: creation of a document-object
               document = new LwgDocument(reader.getPageSizeWithRotation(1));
               // step 2: we create a writer that listens to the document
               writer = new PdfCopy(document, new FileOutputStream(pdf_file));
               // step 3: we open the document
               document.open();
            }
            // step 4: we add content
            PdfImportedPage page;
            for (int p = 0; p < n;)
            {
               ++p;
               page = writer.getImportedPage(reader, p);
               writer.addPage(page);
               System.out.println("Processed page " + p);
            }
         }
         if (!master.isEmpty())
            writer.setOutlines(master);
         // step 5: we close the document
         document.close();
      }
      catch (Exception e)
      {
         e.printStackTrace();
      }
   }

   /**
    *
    * @see com.lowagie.toolbox.AbstractTool#valueHasChanged(com.lowagie.toolbox.arguments.AbstractArgument)
    * @param arg StringArgument
    */
   public void valueHasChanged(AbstractArgument arg)
   {
      if (internalFrame == null)
      {
         // if the internal frame is null, the tool was called from the command line
         return;
      }
      // represent the changes of the argument in the internal frame
   }

   /**
    * Concatenates two PDF files.
    *
    * @param args String[]
    */
   public static void main(String[] args)
   {
      Concat tool = new Concat();
      if (args.length < 2)
      {
         System.err.println(tool.getUsage());
      }
      tool.setMainArguments(args);
      tool.execute();
   }

   /**
    *
    * @see com.lowagie.toolbox.AbstractTool#getDestPathPDF()
    * @throws InstantiationException
    * @return File
    */
   protected File getDestPathPDF() throws InstantiationException
   {
      return (File) getValue("destfile");
   }

}
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