//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
/// <summary>
/// Constructor.
/// </summary>
internal UserUseLicenseDictionaryLoader(RightsManagementEncryptionTransform rmet)
{
_dict = new Dictionary<ContentUser, UseLicense>(ContentUser._contentUserComparer);
//
// This constructor is only called from RightsManagementEncryptionTransform
// .GetEmbeddedUseLicenses. That method passes "this" as the parameter.
// So it can't possibly be null.
//
Invariant.Assert(rmet != null);
Load(rmet);
}
RightsManagementInformation(
RightsManagementEncryptionTransform rmet
)
{
_rmet = rmet;
}
/// <summary>
/// Tranform object is created. We are no longer using reflection to do this. We are supporting limited data transforms.
/// </summary>
private IDataTransform InstantiateDataTransformObject(int transformClassType, string transformClassName, TransformEnvironment transformEnvironment )
{
object transformInstance = null;
if (transformClassType != (int) TransformIdentifierTypes_PredefinedTransformName)
throw new NotSupportedException(SR.Get(SRID.TransformTypeUnsupported));
// Transform Identifier: we preserve casing, but do case-insensitive comparison
if (((IEqualityComparer) CU.StringCaseInsensitiveComparer).Equals(transformClassName,
RightsManagementEncryptionTransform.ClassTransformIdentifier))
{
transformInstance = new RightsManagementEncryptionTransform( transformEnvironment);
}
else if (((IEqualityComparer) CU.StringCaseInsensitiveComparer).Equals(transformClassName,
CompressionTransform.ClassTransformIdentifier))
{
transformInstance = new CompressionTransform( transformEnvironment );
}
else
{
//this transform class is not supported. Need to change this to appropriate error.
throw new ArgumentException(
SR.Get(SRID.TransformLabelUndefined));
}
if (null != transformInstance)
{
if( !( transformInstance is IDataTransform ) )
throw new ArgumentException(
SR.Get(SRID.TransformObjectImplementIDataTransform));
return (IDataTransform)transformInstance;
}
return null;
}
DeleteUseLicenseForUser(
RightsManagementEncryptionTransform rmet,
StreamInfo si,
object param,
ref bool stop
)
{
ContentUser userToDelete = param as ContentUser;
if (userToDelete == null)
{
throw new ArgumentException(SR.Get(SRID.CallbackParameterInvalid), "param");
}
ContentUser userFromStream = null;
using (Stream stream = si.GetStream(FileMode.Open, FileAccess.Read))
{
using (BinaryReader utf8Reader = new BinaryReader(stream, Encoding.UTF8))
{
userFromStream = rmet.LoadUserFromStream(utf8Reader);
}
}
if (userFromStream.GenericEquals(userToDelete))
{
si.Delete();
}
}
LoadUseLicenseForUser(
RightsManagementEncryptionTransform rmet,
StreamInfo si,
object param,
ref bool stop
)
{
LoadUseLicenseForUserParams lulfup = param as LoadUseLicenseForUserParams;
if (lulfup == null)
{
throw new ArgumentException(SR.Get(SRID.CallbackParameterInvalid), "param");
}
ContentUser userDesired = lulfup.User;
Debug.Assert(userDesired != null);
ContentUser userFromStream = null;
using (Stream stream = si.GetStream(FileMode.Open, FileAccess.Read))
{
using (BinaryReader utf8Reader = new BinaryReader(stream, Encoding.UTF8))
{
userFromStream = rmet.LoadUserFromStream(utf8Reader);
if (userFromStream.GenericEquals(userDesired))
{
lulfup.UseLicense = rmet.LoadUseLicenseFromStream(utf8Reader);
stop = true;
}
}
}
}
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
/// <summary>
/// Load the contents of the dictionary from the compound file.
/// </summary>
/// <param name="rmet">
/// The object that knows how to load use license data from the compound file.
/// </param>
/// <exception cref="ArgumentNullException">
/// If <paramref name="rmet"/> is null.
/// </exception>
private void Load(RightsManagementEncryptionTransform rmet )
{
rmet.EnumUseLicenseStreams(
new RightsManagementEncryptionTransform.UseLicenseStreamCallback(
this.AddUseLicenseFromStreamToDictionary
),
null
);
}
AddUseLicenseFromStreamToDictionary(
RightsManagementEncryptionTransform rmet,
StreamInfo si,
object param,
ref bool stop
)
{
ContentUser user;
using (Stream stream = si.GetStream(FileMode.Open, FileAccess.Read))
{
using(BinaryReader utf8Reader = new BinaryReader(stream, _utf8Encoding))
{
UseLicense useLicense = rmet.LoadUseLicenseAndUserFromStream(utf8Reader, out user);
_dict.Add(user, useLicense);
}
}
}