public CosBase Parse(IRandomAccessRead reader, long objectNumber, int objectGeneration,
CosObjectPool pool, CrossReferenceTable crossReferenceTable,
BruteForceSearcher bruteForceSearcher,
bool isLenient,
bool requireExistingObject)
{
if (pool == null)
{
throw new ArgumentNullException(nameof(pool));
}
var key = new CosObjectKey(objectNumber, objectGeneration);
var pdfObject = pool.GetOrCreateDefault(key);
if (pdfObject.GetObject() != null)
{
return(pdfObject.GetObject());
}
if (crossReferenceTable == null)
{
throw new ArgumentNullException(nameof(crossReferenceTable));
}
var offsetOrStreamNumber = TryGet(key, crossReferenceTable.ObjectOffsets);
if (requireExistingObject && (offsetOrStreamNumber == null || offsetOrStreamNumber <= 0))
{
throw new InvalidOperationException("Object must be defined and not compressed: " + key);
}
if (isLenient && offsetOrStreamNumber == null)
{
var locations = bruteForceSearcher.GetObjectLocations();
offsetOrStreamNumber = TryGet(key, locations);
if (offsetOrStreamNumber != null)
{
crossReferenceTable.UpdateOffset(key, offsetOrStreamNumber.Value);
}
}
if (offsetOrStreamNumber == null)
{
return(CosNull.Null);
}
var isCompressedStreamObject = offsetOrStreamNumber <= 0;
if (!isCompressedStreamObject)
{
return(ParseObjectFromFile(offsetOrStreamNumber.Value, reader, key, pool, isLenient));
}
return(ParseCompressedStreamObject(reader, -offsetOrStreamNumber.Value, objectNumber, pool, crossReferenceTable, bruteForceSearcher, isLenient));
}
public CosBase Parse(IndirectReference indirectReference, IRandomAccessRead reader, bool isLenientParsing = true, bool requireExistingObject = false)
{
var key = new CosObjectKey(indirectReference.ObjectNumber, indirectReference.Generation);
var pdfObject = objectPool.GetOrCreateDefault(key);
if (pdfObject.GetObject() != null)
{
return(pdfObject.GetObject());
}
var offsetOrStreamNumber = TryGet(key, crossReferenceTable.ObjectOffsets);
if (requireExistingObject && (offsetOrStreamNumber == null || offsetOrStreamNumber <= 0))
{
throw new InvalidOperationException("Object must be defined and not compressed: " + key);
}
if (isLenientParsing && offsetOrStreamNumber == null)
{
var locations = bruteForceSearcher.GetObjectLocations();
offsetOrStreamNumber = TryGet(key, locations);
if (offsetOrStreamNumber != null)
{
crossReferenceTable.UpdateOffset(key, offsetOrStreamNumber.Value);
}
}
if (offsetOrStreamNumber == null)
{
if (isLenientParsing)
{
return(CosNull.Null);
}
throw new InvalidOperationException($"Could not locate the object {key.Number} which was not found in the cross reference table.");
}
var isCompressedStreamObject = offsetOrStreamNumber <= 0;
if (!isCompressedStreamObject)
{
return(ParseObjectFromFile(offsetOrStreamNumber.Value, reader, key, objectPool, isLenientParsing));
}
return(ParseCompressedStreamObject(reader, -offsetOrStreamNumber.Value, indirectReference.ObjectNumber, isLenientParsing));
}