ExtractEmbeddedFile(string,string,int,string) Method

 
import java.io.ByteArrayInputStream; 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.FileReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.nio.file.Files; 
import java.nio.file.Paths; 
import java.nio.file.StandardCopyOption; 
import java.util.ArrayList; 
import java.util.Date; 
import java.util.List; 
import java.util.Scanner; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.pdf.*; 
 
 
public void pdfFileExtractAttachmentsAndStitch() throws IOException { 
 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String inputFileName = combine(LEAD_VARS_IMAGES_DIR, "leadtools.pdf"); 
   String outputFileName = combine(LEAD_VARS_IMAGES_DIR, "LEAD_extractedAndStitched.pdf"); 
 
   // Get the number of embedded files (attachments) in the input file 
   int attachmentCount = PDFFile.getEmbeddedFileCount(inputFileName, null); 
 
   // If the file does not have any attachments we are done 
   if (attachmentCount == 0) { 
      Files.copy(Paths.get(inputFileName), Paths.get(outputFileName), StandardCopyOption.REPLACE_EXISTING); 
      return; 
   } 
 
   // To convert attachment files that are not PDF 
   RasterCodecs rasterCodecs = new RasterCodecs(); 
   rasterCodecs.setThrowExceptionsOnInvalidImages(false); 
   ArrayList<String> tempFiles = new ArrayList<String>(); 
 
   // Now, extract all the attachments 
   for (int attachmentNumber = 1; attachmentNumber <= attachmentCount; attachmentNumber++) { 
 
      // Extract this attachment to a temporary file 
      InputStream temp = new FileInputStream(new File("temp")); 
      LeadStream tempFile = new LeadStream(temp, false); 
      PDFFile.extractEmbeddedFile(inputFileName, null, attachmentNumber, tempFile); 
 
      // If attachment is not PDF, convert it 
      RasterImageFormat format; 
      int pageCount; 
      CodecsImageInfo info = rasterCodecs.getInformation(tempFile, true); 
 
      format = info.getFormat(); 
      pageCount = info.getTotalPages(); 
      info = null; 
 
      if (format == RasterImageFormat.UNKNOWN) { 
         // We do not know what to do with this attachment, log and ignore it 
         System.out.println("Could not convert attachment file to PDF, ignoring"); 
         tempFile.dispose(); 
      } else if (format != RasterImageFormat.RAS_PDF) { 
         // Simple conversion using RasterImage. 
         // TODO for the Example: A better way is to use the DocumentConverter to get 
         // true document conversion with all the 
         // options available 
         // string tempPdfFile = Path.GetTempFileName(); 
         File tempPdfFile = new File("tempPdfFile"); 
 
         for (int pageNumber = 1; pageNumber <= pageCount; pageNumber++) { 
            RasterImage image = rasterCodecs.load("tempPdfFile", pageNumber); 
 
            rasterCodecs.save(image, "tempPdfFile", RasterImageFormat.RAS_PDF_JPEG_422, 0, 1, -1, -1, 
                  CodecsSavePageMode.APPEND); 
            image = null; 
         } 
 
         Files.copy(Paths.get(tempPdfFile.getName()), Paths.get(tempFile.getFileName()), 
               StandardCopyOption.REPLACE_EXISTING); 
         tempPdfFile.delete(); 
         tempFiles.add(tempFile.getFileName()); 
      } else { 
         // TODO for the Example: Check if this file is PDF with attachments and call the 
         // function recursively. 
         tempFiles.add(tempFile.getFileName()); 
      } 
   } 
 
   // Time to generate the final document, first the pages from the original 
   // document 
   // Did we extract/convert any attachments? 
   if (tempFiles.size() > 0) { 
      // Note that if the original document is PDF portfolio, then it does not contain 
      // real pages. Just a placeholder that should be ignored 
      PDFFile file; 
      if (!PDFFile.isPortfolio(inputFileName, null)) { 
         file = new PDFFile(inputFileName); 
         file.mergeWith(tempFiles.toArray(new String[tempFiles.size()]), outputFileName); 
      } else { 
         // This is portfolio, so we will ignore the original file and just merge the 
         // attachments 
         String firstFile = tempFiles.get(0); 
         tempFiles.remove(0); 
         file = new PDFFile(firstFile); 
         file.mergeWith(tempFiles.toArray(new String[tempFiles.size()]), outputFileName); 
         file = null; 
      } 
   } else { 
      // No, just copy the original file over 
      Files.copy(Paths.get(inputFileName), Paths.get(outputFileName), StandardCopyOption.REPLACE_EXISTING); 
   } 
   assertTrue("Check if destination file exists", new File(outputFileName).exists()); 
 
   // Clean up 
   rasterCodecs.dispose(); 
 
}