| protected static ComputeHash ( Stream value ) : string | ||
| value | Stream | |
| return | string | |
/// <summary>
/// Generates a unique hash from string
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
protected static string ComputeHash(string value)
{
// get String as a Byte[]
byte[] buffer = Encoding.Unicode.GetBytes(value);
return(ETag.ComputeHash(buffer));
}
/// <summary>
/// Sets ETag.Value
/// </summary>
/// <param name="Entity"></param>
protected virtual string CalculateETag()
{
bool isHash;
object metaData = this.GetMetaData(out isHash);
string etag;
if (metaData is Guid)
{
etag = ((Guid)metaData).ToString("N");
}
else if (metaData is string)
{
if (isHash)
{
etag = (string)metaData;
}
else
{
etag = ETag.ComputeHash((string)metaData);
}
}
else if (metaData is byte[])
{
if (isHash)
{
etag = ETag.FormatBytes((byte[])metaData);
}
else
{
etag = ETag.ComputeHash((byte[])metaData);
}
}
else if (metaData is Stream)
{
etag = ETag.ComputeHash((Stream)metaData);
}
else
{
throw new NotSupportedException("GetMetaData must return Guid, String, Byte[], or Stream");
}
return("\"" + etag + "\"");
}
