C# PdfObject.SetObjectID方法代码示例

        /// <summary>
        /// Reads PDF object from input stream.
        /// </summary>
        /// <param name="pdfObject">Either the instance of a derived type or null. If it is null
        /// an appropriate object is created.</param>
        /// <param name="objectID">The address of the object.</param>
        /// <param name="includeReferences">If true, specifies that all indirect objects
        /// are included recursively.</param>
        /// <param name="fromObjecStream">If true, the objects is parsed from an object stream.</param>
        public PdfObject ReadObject(PdfObject pdfObject, PdfObjectID objectID, bool includeReferences, bool fromObjecStream)
        {
#if DEBUG_
            Debug.WriteLine("ReadObject: " + objectID);
            if (objectID.ObjectNumber == 20)
                GetType();
#endif
            int objectNumber = objectID.ObjectNumber;
            int generationNumber = objectID.GenerationNumber;
            if (!fromObjecStream)
            {
                MoveToObject(objectID);
                objectNumber = ReadInteger();
                generationNumber = ReadInteger();
            }
#if DEBUG
            // The following assertion sometime failed (see below)
            //Debug.Assert(objectID == new PdfObjectID(objectNumber, generationNumber));
            if (!fromObjecStream && objectID != new PdfObjectID(objectNumber, generationNumber))
            {
                // A special kind of bug? Or is this an undocumented PDF feature?
                // PDF4NET 2.6 provides a sample called 'Unicode', which produces a file 'unicode.pdf'
                // The iref table of this file contains the following entries:
                //    iref
                //    0 148
                //    0000000000 65535 f 
                //    0000000015 00000 n 
                //    0000000346 00000 n 
                //    ....
                //    0000083236 00000 n 
                //    0000083045 00000 n 
                //    0000083045 00000 n 
                //    0000083045 00000 n 
                //    0000083045 00000 n 
                //    0000080334 00000 n 
                //    ....
                // Object 84, 85, 86, and 87 maps to the same dictionary, but all PDF readers I tested
                // ignores this mismatch! The following assertion failed about 50 times with this file.
#if true_
                string message = String.Format("xref entry {0} {1} maps to object {2} {3}.",
                    objectID.ObjectNumber, objectID.GenerationNumber, objectNumber, generationNumber);
                Debug.Assert(false, message);
#endif
            }
#endif
            // Always use object ID from iref table (see above).
            objectNumber = objectID.ObjectNumber;
            generationNumber = objectID.GenerationNumber;
#if true_
            Debug.WriteLine(String.Format("obj: {0} {1}", objectNumber, generationNumber));
#endif
            if (!fromObjecStream)
                ReadSymbol(Symbol.Obj);

            bool checkForStream = false;
            Symbol symbol = ScanNextToken();
            switch (symbol)
            {
                case Symbol.BeginArray:
                    PdfArray array;
                    if (pdfObject == null)
                        array = new PdfArray(_document);
                    else
                        array = (PdfArray)pdfObject;
                    //PdfObject.RegisterObject(array, objectID, generation);
                    pdfObject = ReadArray(array, includeReferences);
                    pdfObject.SetObjectID(objectNumber, generationNumber);
                    break;

                case Symbol.BeginDictionary:
                    PdfDictionary dict;
                    if (pdfObject == null)
                        dict = new PdfDictionary(_document);
                    else
                        dict = (PdfDictionary)pdfObject;
                    //PdfObject.RegisterObject(dict, objectID, generation);
                    checkForStream = true;
                    pdfObject = ReadDictionary(dict, includeReferences);
                    pdfObject.SetObjectID(objectNumber, generationNumber);
                    break;

                // Acrobat 6 Professional proudly presents: The Null object!
                // Even with a one-digit object number an indirect reference «x 0 R» to this object is
                // one character larger than the direct use of «null». Probable this is the reason why
                // it is true that Acrobat Web Capture 6.0 creates this object, but obviously never 
                // creates a reference to it!
                case Symbol.Null:
                    pdfObject = new PdfNullObject(_document);
                    pdfObject.SetObjectID(objectNumber, generationNumber);
                    if (!fromObjecStream)
                        ReadSymbol(Symbol.EndObj);
//.........这里部分代码省略.........

        //protected Symbol ScanNextToken(out string token, bool testReference)
        //{
        //  Symbol symbol = lexer.ScanNextToken(testReference);
        //  token = lexer.Token;
        //  return symbol;
        //}

        //    internal object ReadObject(int position)
        //    {
        //      lexer.Position = position;
        //      return ReadObject(false);
        //    }
        //
        //    internal virtual object ReadObject(bool directObject)
        //    {
        //      throw new InvalidOperationException("PdfParser.ReadObject() base class called");
        //    }

        /// <summary>
        /// Reads the object ID and the generation and sets it into the specified object.
        /// </summary>
        private void ReadObjectID(PdfObject obj)
        {
            int objectNubmer = ReadInteger();
            int generationNumber = ReadInteger();
            ReadSymbol(Symbol.Obj);
            if (obj != null)
                obj.SetObjectID(objectNubmer, generationNumber);
        }

        /// <summary>
        /// Adds a PdfObject to the table.
        /// </summary>
        public void Add(PdfObject value)
        {
            if (value.Owner == null)
                value.Document = _document;
            else
                Debug.Assert(value.Owner == _document);

            if (value.ObjectID.IsEmpty)
                value.SetObjectID(GetNewObjectNumber(), 0);

            if (ObjectTable.ContainsKey(value.ObjectID))
                throw new InvalidOperationException("Object already in table.");

            ObjectTable.Add(value.ObjectID, value.Reference);
        }