/// <summary>
/// Reads the compressed object with the specified index in the object stream
/// of the object with the specified object id.
/// </summary>
internal PdfReference ReadCompressedObject(PdfObjectID objectID, int index)
{
PdfReference iref;
#if true
Debug.Assert(_document._irefTable.ObjectTable.ContainsKey(objectID));
if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
{
throw new NotImplementedException("This case is not coded or something else went wrong");
}
#else
// We should never come here because the object stream must be a type 1 entry in the xref stream
// and iref was created before.
// Has the specified object already an iref in the object table?
if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
{
try
{
#if true_
iref = new PdfReference(objectID,);
iref.ObjectID = objectID;
_document._irefTable.Add(os);
#else
PdfDictionary dict = (PdfDictionary)ReadObject(null, objectID, false, false);
PdfObjectStream os = new PdfObjectStream(dict);
iref = new PdfReference(os);
iref.ObjectID = objectID;
_document._irefTable.Add(os);
#endif
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
throw;
}
}
#endif
// Read in object stream object when we come here for the very first time.
if (iref.Value == null)
{
try
{
Debug.Assert(_document._irefTable.Contains(iref.ObjectID));
PdfDictionary pdfObject = (PdfDictionary)ReadObject(null, iref.ObjectID, false, false);
PdfObjectStream objectStream = new PdfObjectStream(pdfObject);
Debug.Assert(objectStream.Reference == iref);
// objectStream.Reference = iref; Superfluous, see Assert in line before.
Debug.Assert(objectStream.Reference.Value != null, "Something went wrong.");
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
throw;
}
}
Debug.Assert(iref.Value != null);
PdfObjectStream objectStreamStream = iref.Value as PdfObjectStream;
if (objectStreamStream == null)
{
Debug.Assert(((PdfDictionary)iref.Value).Elements.GetName("/Type") == "/ObjStm");
objectStreamStream = new PdfObjectStream((PdfDictionary)iref.Value);
Debug.Assert(objectStreamStream.Reference == iref);
// objectStream.Reference = iref; Superfluous, see Assert in line before.
Debug.Assert(objectStreamStream.Reference.Value != null, "Something went wrong.");
}
Debug.Assert(objectStreamStream != null);
//PdfObjectStream objectStreamStream = (PdfObjectStream)iref.Value;
if (objectStreamStream == null)
throw new Exception("Something went wrong here.");
return objectStreamStream.ReadCompressedObject(index);
}
/// <summary>
/// Reads the irefs from the compressed object with the specified index in the object stream
/// of the object with the specified object id.
/// </summary>
internal void ReadIRefsFromCompressedObject(PdfObjectID objectID)
{
PdfReference iref;
Debug.Assert(_document._irefTable.ObjectTable.ContainsKey(objectID));
if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
{
// We should never come here because the object stream must be a type 1 entry in the xref stream
// and iref was created before.
throw new NotImplementedException("This case is not coded or something else went wrong");
}
// Read in object stream object when we come here for the very first time.
if (iref.Value == null)
{
try
{
Debug.Assert(_document._irefTable.Contains(iref.ObjectID));
PdfDictionary pdfObject = (PdfDictionary)ReadObject(null, iref.ObjectID, false, false);
PdfObjectStream objectStream = new PdfObjectStream(pdfObject);
Debug.Assert(objectStream.Reference == iref);
// objectStream.Reference = iref; Superfluous, see Assert in line before.
Debug.Assert(objectStream.Reference.Value != null, "Something went wrong.");
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
throw;
}
}
Debug.Assert(iref.Value != null);
PdfObjectStream objectStreamStream = iref.Value as PdfObjectStream;
if (objectStreamStream == null)
{
Debug.Assert(((PdfDictionary)iref.Value).Elements.GetName("/Type") == "/ObjStm");
objectStreamStream = new PdfObjectStream((PdfDictionary)iref.Value);
Debug.Assert(objectStreamStream.Reference == iref);
// objectStream.Reference = iref; Superfluous, see Assert in line before.
Debug.Assert(objectStreamStream.Reference.Value != null, "Something went wrong.");
}
Debug.Assert(objectStreamStream != null);
//PdfObjectStream objectStreamStream = (PdfObjectStream)iref.Value;
if (objectStreamStream == null)
throw new Exception("Something went wrong here.");
objectStreamStream.ReadReferences(_document._irefTable);
}