Package com.drew.metadata.exif

Examples of com.drew.metadata.exif.ExifDirectory

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    public Date readOriginalTime(File jpeg) throws IOException, ParseException{
        String dateString = null;
        try{
            Metadata meta = (new ExifReader(jpeg)).extract();
            ExifDirectory exif = (ExifDirectory) meta.getDirectory(ExifDirectory.class);
            dateString = exif.getString(ExifDirectory.TAG_DATETIME_ORIGINAL);
        } catch (JpegProcessingException ex){
            throw toIOException(ex, jpeg);
        }
        //interpret the dateString as an UTC dateTime value
        return parseExifDate(dateString);
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      Iterator directories = metadata.getDirectoryIterator();
      while (directories.hasNext()) {
        Directory directory = (Directory) directories.next(); // iterate through tags
       
        if (directory instanceof ExifDirectory){
          ExifDirectory exifDir = (ExifDirectory) directory;
          if (exifDir.containsThumbnail()){
              InputStream in = new ByteArrayInputStream(exifDir.getThumbnailData());
              image = ImageIO.read(in);
          }
        }
      }
    } catch (Exception e) {}
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        super(s);
    }

    public void testXResolutionDescription() throws Exception
    {
        ExifDirectory directory = new ExifDirectory();
        directory.setRational(ExifDirectory.TAG_X_RESOLUTION, new Rational(72, 1));
        // 2 is for 'Inch'
        directory.setInt(ExifDirectory.TAG_RESOLUTION_UNIT, 2);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("72 dots per inch", descriptor.getDescription(ExifDirectory.TAG_X_RESOLUTION));
    }
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        assertEquals("72 dots per inch", descriptor.getDescription(ExifDirectory.TAG_X_RESOLUTION));
    }

    public void testYResolutionDescription() throws Exception
    {
        ExifDirectory directory = new ExifDirectory();
        directory.setRational(ExifDirectory.TAG_Y_RESOLUTION, new Rational(50, 1));
        // 3 is for 'cm'
        directory.setInt(ExifDirectory.TAG_RESOLUTION_UNIT, 3);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("50 dots per cm", descriptor.getDescription(ExifDirectory.TAG_Y_RESOLUTION));
    }
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    }

    public void testUserCommentDescription_EmptyEncoding() throws Exception
    {
        byte[] commentBytes = "\0\0\0\0\0\0\0\0This is a comment".getBytes();
        ExifDirectory directory = new ExifDirectory();
        directory.setByteArray(ExifDirectory.TAG_USER_COMMENT, commentBytes);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("This is a comment", descriptor.getDescription(ExifDirectory.TAG_USER_COMMENT));
    }
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    }

    public void testUserCommentDescription_AsciiHeaderExtendedAsciiEncoding() throws Exception
    {
        byte[] commentBytes = "ASCII\0\0This is a comment with extended characters ��� ���".getBytes();
        ExifDirectory directory = new ExifDirectory();
        directory.setByteArray(ExifDirectory.TAG_USER_COMMENT, commentBytes);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("This is a comment with extended characters ��� ���", descriptor.getDescription(ExifDirectory.TAG_USER_COMMENT));
    }
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    }

    public void testUserCommentDescription_AsciiHeaderAsciiEncoding() throws Exception
    {
        byte[] commentBytes = "ASCII\0\0This is a comment".getBytes();
        ExifDirectory directory = new ExifDirectory();
        directory.setByteArray(ExifDirectory.TAG_USER_COMMENT, commentBytes);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("This is a comment", descriptor.getDescription(ExifDirectory.TAG_USER_COMMENT));
    }
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    }

    public void testUserCommentDescription_BlankAscii() throws Exception
    {
        byte[] commentBytes = "ASCII\0\0\0          ".getBytes();
        ExifDirectory directory = new ExifDirectory();
        directory.setByteArray(ExifDirectory.TAG_USER_COMMENT, commentBytes);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("", descriptor.getDescription(ExifDirectory.TAG_USER_COMMENT));
    }
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    public void testUserCommentDescription_ZeroLengthAscii1() throws Exception
    {
        // the 10-byte encoding region is only partially full
        byte[] commentBytes = "ASCII\0\0\0".getBytes();
        ExifDirectory directory = new ExifDirectory();
        directory.setByteArray(ExifDirectory.TAG_USER_COMMENT, commentBytes);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("ASCII", descriptor.getDescription(ExifDirectory.TAG_USER_COMMENT));
    }
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    public void testUserCommentDescription_ZeroLengthAscii2() throws Exception
    {
        // fill the 10-byte encoding region
        byte[] commentBytes = "ASCII\0\0\0\0\0".getBytes();
        ExifDirectory directory = new ExifDirectory();
        directory.setByteArray(ExifDirectory.TAG_USER_COMMENT, commentBytes);
        ExifDescriptor descriptor = new ExifDescriptor(directory);
        assertEquals("", descriptor.getDescription(ExifDirectory.TAG_USER_COMMENT));
    }
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Related Classes of com.drew.metadata.exif.ExifDirectory

  • com.drew.imaging.ImageMetadataReader
  • com.drew.imaging.jpeg.JpegMetadataReader
  • com.drew.metadata.exif.test.ExifDescriptorTest
  • com.drew.metadata.exif.test.ExifDirectoryTest
  • de.offis.faint.model.ImageModel
  • net.sourceforge.gpstools.exif.MetadataExtractorExifReader
  • org.apache.tika.parser.image.ImageMetadataExtractorTest
  • org.photovault.image.ImageIOImage
  • java.io.FileOutputStream
  • com.drew.metadata.MetadataException
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