private void SerArray(PdfArray array, int level, ByteBufferOutputStream bb)
{
bb.Append("$A");
if (level <= 0)
{
return;
}
for (int k = 0; k < array.Size(); ++k)
{
SerObject(array.Get(k, false), level, bb);
}
}
internal ByteStore(PdfDictionary dict, IntHashtable serialized)
{
try {
md5 = Org.BouncyCastle.Security.DigestUtilities.GetDigest("MD5");
}
catch (Exception e) {
throw new PdfException(e);
}
ByteBufferOutputStream bb = new ByteBufferOutputStream();
int level = 100;
SerObject(dict, level, bb, serialized);
this.b = bb.ToByteArray();
hash = CalculateHash(this.b);
md5 = null;
}
internal SerializedPdfObject(PdfObject obj, Dictionary <int, byte[]> objToSerializedContent)
{
System.Diagnostics.Debug.Assert(obj.IsDictionary() || obj.IsStream());
this.objToSerializedContent = objToSerializedContent;
try {
md5 = Org.BouncyCastle.Security.DigestUtilities.GetDigest("MD5");
}
catch (Exception e) {
throw new PdfException(e);
}
ByteBufferOutputStream bb = new ByteBufferOutputStream();
int level = 100;
SerObject(obj, level, bb);
this.serializedContent = bb.ToByteArray();
hash = CalculateHash(this.serializedContent);
md5 = null;
}
private void SerDic(PdfDictionary dic, int level, ByteBufferOutputStream bb)
{
bb.Append("$D");
if (level <= 0)
{
return;
}
PdfName[] keys = new PdfName[dic.KeySet().Count];
keys = dic.KeySet().ToArray(keys);
iText.IO.Util.JavaUtil.Sort(keys);
foreach (Object key in keys)
{
if (key.Equals(PdfName.P) && (dic.Get((PdfName)key).IsIndirectReference() || dic.Get((PdfName)key).IsDictionary
()) || key.Equals(PdfName.Parent))
{
// ignore recursive call
continue;
}
SerObject((PdfObject)key, level, bb);
SerObject(dic.Get((PdfName)key, false), level, bb);
}
}
// TODO 2: object is not checked if it was already serialized on start, double work could be done
// TODO 3: indirect objects often stored multiple times as parts of the other objects
private void SerObject(PdfObject obj, int level, ByteBufferOutputStream bb)
{
if (level <= 0)
{
return;
}
if (obj == null)
{
bb.Append("$Lnull");
return;
}
PdfIndirectReference reference = null;
ByteBufferOutputStream savedBb = null;
int indRefKey = -1;
if (obj.IsIndirectReference())
{
reference = (PdfIndirectReference)obj;
indRefKey = CalculateIndRefKey(reference);
byte[] cached = objToSerializedContent.Get(indRefKey);
if (cached != null)
{
bb.Append(cached);
return;
}
else
{
savedBb = bb;
bb = new ByteBufferOutputStream();
obj = reference.GetRefersTo();
}
}
if (obj.IsStream())
{
bb.Append("$B");
SerDic((PdfDictionary)obj, level - 1, bb);
if (level > 0)
{
md5.Reset();
bb.Append(md5.Digest(((PdfStream)obj).GetBytes(false)));
}
}
else
{
if (obj.IsDictionary())
{
SerDic((PdfDictionary)obj, level - 1, bb);
}
else
{
if (obj.IsArray())
{
SerArray((PdfArray)obj, level - 1, bb);
}
else
{
if (obj.IsString())
{
bb.Append("$S").Append(obj.ToString());
}
else
{
if (obj.IsName())
{
bb.Append("$N").Append(obj.ToString());
}
else
{
bb.Append("$L").Append(obj.ToString());
}
}
}
}
}
// PdfNull case is also here
if (savedBb != null)
{
objToSerializedContent[indRefKey] = bb.GetBuffer();
savedBb.Append(bb);
}
}
private void SerObject(PdfObject obj, int level, ByteBufferOutputStream bb, IntHashtable serialized)
{
if (level <= 0)
{
return;
}
if (obj == null)
{
bb.Append("$Lnull");
return;
}
PdfIndirectReference reference = null;
ByteBufferOutputStream savedBb = null;
if (obj.IsIndirectReference())
{
reference = (PdfIndirectReference)obj;
int key = GetCopyObjectKey(obj);
if (serialized.ContainsKey(key))
{
bb.Append((int)serialized.Get(key));
return;
}
else
{
savedBb = bb;
bb = new ByteBufferOutputStream();
}
}
if (obj.IsStream())
{
bb.Append("$B");
SerDic((PdfDictionary)obj, level - 1, bb, serialized);
if (level > 0)
{
md5.Reset();
bb.Append(md5.Digest(((PdfStream)obj).GetBytes(false)));
}
}
else
{
if (obj.IsDictionary())
{
SerDic((PdfDictionary)obj, level - 1, bb, serialized);
}
else
{
if (obj.IsArray())
{
SerArray((PdfArray)obj, level - 1, bb, serialized);
}
else
{
if (obj.IsString())
{
bb.Append("$S").Append(obj.ToString());
}
else
{
if (obj.IsName())
{
bb.Append("$N").Append(obj.ToString());
}
else
{
bb.Append("$L").Append(obj.ToString());
}
}
}
}
}
if (savedBb != null)
{
int key = GetCopyObjectKey(reference);
if (!serialized.ContainsKey(key))
{
serialized.Put(key, CalculateHash(bb.GetBuffer()));
}
savedBb.Append(bb);
}
}