// Token: 0x06006C84 RID: 27780 RVA: 0x001F3B50 File Offset: 0x001F1D50
internal UnsafeIndexingFilterStream(MS.Internal.Interop.IStream oleStream)
{
if (oleStream == null)
{
throw new ArgumentNullException("oleStream");
}
this._oleStream = oleStream;
this._disposed = false;
}
void IPersistStream.Load(MS.Internal.Interop.IStream stream)
{
// Check argument.
if (stream == null)
{
throw new ArgumentNullException("stream");
}
// Only one of _package and _encryptedPackage can be non-null at a time.
Invariant.Assert(_package == null || _encryptedPackage == null);
// If there has been a previous call to Load, reinitialize everything.
// Note closing a closed stream does not cause any exception.
ReleaseResources();
_filter = null;
_xpsFileName = null;
try
{
_packageStream = new UnsafeIndexingFilterStream(stream);
// different filter for encrypted package
if (EncryptedPackageEnvelope.IsEncryptedPackageEnvelope(_packageStream))
{
// Open the encrypted package.
_encryptedPackage = EncryptedPackageEnvelope.Open(_packageStream);
_filter = new EncryptedPackageFilter(_encryptedPackage);
}
else
{
// Open the package.
_package = Package.Open(_packageStream);
_filter = new PackageFilter(_package);
}
}
catch (IOException ex)
{
throw new COMException(ex.Message, (int)FilterErrorCode.FILTER_E_ACCESS);
}
catch (Exception ex)
{
throw new COMException(ex.Message, (int)FilterErrorCode.FILTER_E_UNKNOWNFORMAT);
}
finally
{
// clean-up if we failed
if (_filter == null)
{
ReleaseResources();
}
}
}
/// <summary>
/// Saves a copy of the object into the specified stream.
/// </summary>
/// <param name="stream">The stream to which the object is saved. </param>
/// <param name="fClearDirty">Indicates whether the dirty state is to be cleared. </param>
/// <remarks>
/// Expected error codes are described at
/// http://msdn.microsoft.com/library/default.asp?url=/library/en-us/com/html/b748b4f9-ef9c-486b-bdc4-4d23c4640ff7.asp
/// </remarks>
void IPersistStream.Save(MS.Internal.Interop.IStream stream, bool fClearDirty)
{
throw new COMException(SR.Get(SRID.FilterIPersistStreamIsReadOnly), NativeMethods.STG_E_CANTSAVE);
}
