/// <summary>
/// Creates an EmberSequence object with the passed BerType. Convenience method
/// to be called from an overridden CreateNodeFromReader method.
/// </summary>
protected EmberNode CreateSequence(uint type, BerReaderBase reader)
{
var tag = reader.Tag;
var node = new EmberSequence(tag, null);
node.BerTypeNumber = type;
return(node);
}
/// <summary>
/// Creates a new instance of EmberSequence with the IsOrdered flag
/// set to true.
/// </summary>
/// <param name="tag">The tag of the new EmberSequence.</param>
/// <returns>A new instance of EmberSequence with the IsOrdered flag
/// set to true.</returns>
public static EmberSequence CreateOrderedSequence(BerTag tag)
{
var sequence = new EmberSequence(tag)
{
IsOrdered = true,
};
return(sequence);
}
/// <summary>
/// Creates an EmberSequence object with the passed BerType. Convenience method
/// to be called from an overridden CreateNodeFromXml method.
/// </summary>
protected EmberNode CreateSequence(uint type, BerTag tag, XmlReader reader)
{
var node = new EmberSequence(tag, null)
{
BerTypeNumber = type
};
return(node);
}
/// <summary>
/// Creates a container of an application-defined type with Sequence semantics
/// </summary>
/// <param name="type">Application-defined type. BerType.ApplicationFlag can be omitted.</param>
public static EmberSequence CreateApplicationDefinedSequence(BerTag tag, uint type, EmberContainer parent, bool isOrdered = false)
{
var sequence = new EmberSequence(tag, parent)
{
BerTypeNumber = type | BerType.ApplicationFlag,
IsOrdered = isOrdered,
};
return(sequence);
}
/// <summary>
/// Creates a new EmberNode from the TLV the passed BER reader is currently positioned on.
/// </summary>
/// <param name="reader">The BER reader to create the node from.</param>
/// <param name="application">The application interface responsible for creating nodes
/// with application-defined types.</param>
/// <returns>A new instance of EmberNode representing the read TLV or null
/// if the TLV could not be decoded into an EmberNode.
/// This happens if the TLV has an unsupported type.</returns>
internal static EmberNode FromReader(BerReaderBase reader, EmberApplicationInterface application)
{
var node = null as EmberNode;
var type = reader.Type;
var tag = reader.Tag;
if (reader.IsContainer)
{
switch (type)
{
#pragma warning disable 618 // EmberFrame is obsolete
case BerType.Sequence:
if (tag == Legacy.EmberFrame.FrameTag)
{
Debug.WriteLine($"Warning: EmberNode / FromReader / EmberFrame is obsolete");
node = new Legacy.EmberFrame();
}
else
{
node = new EmberSequence(tag, null);
}
break;
#pragma warning restore 618
case BerType.Set:
node = new EmberSet(tag);
break;
default:
{
if (application != null)
{
node = application.CreateNodeFromReader(type, reader);
}
if (node == null)
{
Debug.WriteLine($"Warning: Unknown BER container type: {type}");
node = new EmberContainer(tag, null, type);
}
break;
}
}
}
else
{
switch (type)
{
case BerType.Boolean:
node = new BooleanEmberLeaf(tag, reader.GetBoolean());
break;
case BerType.Integer:
if (reader.Length > 4)
{
node = new LongEmberLeaf(tag, reader.GetLong());
}
else
{
node = new IntegerEmberLeaf(tag, reader.GetInteger());
}
break;
case BerType.Real:
node = new RealEmberLeaf(tag, reader.GetReal());
break;
case BerType.UTF8String:
node = new StringEmberLeaf(tag, reader.GetString());
break;
case BerType.OctetString:
node = new OctetStringEmberLeaf(tag, reader.GetOctetString());
break;
case BerType.RelativeOid:
node = new RelativeOidEmberLeaf(tag, reader.GetRelativeOid());
break;
case BerType.ObjectIdentifier:
node = new ObjectIdentifierEmberLeaf(tag, reader.GetObjectIdentifier());
break;
case BerType.Null:
node = new NullEmberLeaf(tag);
break;
default:
Debug.WriteLine($"Unknown BER value type: {type}");
break;
}
}
return(node);
}