/// <summary>
/// This method serves as marsheller of objects for dataset.
/// It converts from IPTC octets to relevant java object.
/// </summary>
/// <param name="aDirectory">the directory</param>
/// <param name="aDirectoryType">the directory type</param>
/// <param name="aTagType">the tag type</param>
/// <param name="anOffset">the lcOffset</param>
/// <param name="aTagByteCount">the tag byte count</param>
private void ProcessTag(
AbstractDirectory aDirectory,
int aDirectoryType,
int aTagType,
int anOffset,
int aTagByteCount)
{
int tagIdentifier = aTagType | (aDirectoryType << 8);
switch (tagIdentifier)
{
case IptcDirectory.TAG_RECORD_VERSION:
// short
short shortValue = (short)((base.data[anOffset] << 8) | base.data[anOffset + 1]);
aDirectory.SetObject(tagIdentifier, shortValue);
return;
case IptcDirectory.TAG_URGENCY:
// byte
aDirectory.SetObject(tagIdentifier, base.data[anOffset]);
return;
case IptcDirectory.TAG_RELEASE_DATE:
case IptcDirectory.TAG_DATE_CREATED:
// Date object
if (aTagByteCount >= 8)
{
string dateStr = Utils.Decode(base.data, anOffset, aTagByteCount, false);
try
{
int year = Convert.ToInt32(dateStr.Substring(0, 4));
int month = Convert.ToInt32(dateStr.Substring(4, 2)); //No -1 here;
int day = Convert.ToInt32(dateStr.Substring(6, 2));
DateTime date = new DateTime(year, month, day);
aDirectory.SetObject(tagIdentifier, date);
return;
}
catch (Exception)
{
// fall through and we'll store whatever was there as a String
}
}
break; // Added for .Net compiler
//case IptcDirectory.TAG_RELEASE_TIME:
//case IptcDirectory.TAG_TIME_CREATED:
}
// If no special handling by now, treat it as a string
string str = null;
if (aTagByteCount < 1)
{
str = "";
}
else
{
str = Utils.Decode(base.data, anOffset, aTagByteCount, false);
}
if (aDirectory.ContainsTag(tagIdentifier))
{
string[] oldStrings;
string[] newStrings;
try
{
oldStrings = aDirectory.GetStringArray(tagIdentifier);
}
catch (MetadataException)
{
oldStrings = null;
}
if (oldStrings == null)
{
newStrings = new String[1];
}
else
{
newStrings = new string[oldStrings.Length + 1];
for (int i = 0; i < oldStrings.Length; i++)
{
newStrings[i] = oldStrings[i];
}
}
newStrings[newStrings.Length - 1] = str;
aDirectory.SetObject(tagIdentifier, newStrings);
}
else
{
aDirectory.SetObject(tagIdentifier, str);
}
}
/// <summary>
/// Will stock the thumbnail into exif directory if available.
/// </summary>
/// <param name="exifDirectory">where to stock the thumbnail</param>
/// <param name="tiffHeaderOffset">the tiff lcHeader lcOffset value</param>
private void StoreThumbnailBytes(AbstractDirectory exifDirectory, int tiffHeaderOffset)
{
if (!exifDirectory.ContainsTag(ExifDirectory.TAG_COMPRESSION))
{
return;
}
if (!exifDirectory.ContainsTag(ExifDirectory.TAG_THUMBNAIL_LENGTH) ||
!exifDirectory.ContainsTag(ExifDirectory.TAG_THUMBNAIL_OFFSET))
{
return;
}
try
{
int offset = exifDirectory.GetInt(ExifDirectory.TAG_THUMBNAIL_OFFSET);
int length = exifDirectory.GetInt(ExifDirectory.TAG_THUMBNAIL_LENGTH);
byte[] result = new byte[length];
for (int i = 0; i < result.Length; i++)
{
result[i] = base.data[tiffHeaderOffset + offset + i];
}
exifDirectory.SetObject(ExifDirectory.TAG_THUMBNAIL_DATA, result);
}
catch (Exception e)
{
exifDirectory.HasError = true;
Trace.TraceError("Unable to extract thumbnail: " + e.Message);
}
}