internal static async Task <Tuple <Argument[], Argument[]> > GetMethodArgumentsFromNodeId(this UaSession session, NodeId nodeId)
{
var inputArguments = new Argument[0];
var outputArguments = new Argument[0];
var translateRequest = new TranslateBrowsePathsToNodeIdsRequest {
BrowsePaths = { new BrowsePath {
StartingNode = nodeId, RelativePath = new RelativePath(ReferenceTypeIds.HasProperty, "InputArguments")
}, new BrowsePath{
StartingNode = nodeId, RelativePath = new RelativePath(ReferenceTypeIds.HasProperty, "OutputArguments")
} }
};
var translateResponse = await session.TranslateBrowsePathsToNodeIdsAsync(translateRequest);
if (StatusCode.IsGood(translateResponse.Results[0].StatusCode) && translateResponse.Results[0].Targets.Count > 0)
{
var argNodeId = ExpandedNodeId.ToNodeId(translateResponse.Results[0].Targets[0].TargetId, session.NamespaceUris);
var readRequest = new ReadRequest {
NodesToRead = { new ReadValueId {
NodeId = argNodeId, AttributeId = Attributes.Value
} }
};
var readResponse = await session.ReadAsync(readRequest);
if (StatusCode.IsGood(readResponse.Results[0].StatusCode))
{
var value = readResponse.Results[0].GetValue <ExtensionObject[]>(null);
if (value != null)
{
inputArguments = (Argument[])ExtensionObject.ToArray(value, typeof(Argument));
}
}
}
if (StatusCode.IsGood(translateResponse.Results[1].StatusCode) && translateResponse.Results[1].Targets.Count > 0)
{
var argNodeId = ExpandedNodeId.ToNodeId(translateResponse.Results[1].Targets[0].TargetId, session.NamespaceUris);
var readRequest = new ReadRequest {
NodesToRead = { new ReadValueId {
NodeId = argNodeId, AttributeId = Attributes.Value
} }
};
var readResponse = await session.ReadAsync(readRequest);
if (StatusCode.IsGood(readResponse.Results[0].StatusCode))
{
var value = readResponse.Results[0].GetValue <ExtensionObject[]>(null);
if (value != null)
{
outputArguments = (Argument[])ExtensionObject.ToArray(value, typeof(Argument));
}
}
}
return(Tuple.Create(inputArguments, outputArguments));
}
internal static async Task <Type> GetDataTypeFromNodeId(this UaSession session, NodeId nodeId)
{
var readRequest = new ReadRequest {
NodesToRead = { new ReadValueId {
NodeId = nodeId, AttributeId = Attributes.DataType
}, new ReadValueId{
NodeId = nodeId, AttributeId = Attributes.ValueRank
} }
};
var readResponse = await session.ReadAsync(readRequest);
var dataType = readResponse.Results[0].GetValue(NodeId.Null);
var valueRank = readResponse.Results[1].GetValue(-2);
var type = TypeInfo.GetSystemType(dataType, session.Factory);
if (type != null)
{
if (valueRank > 0)
{
return(type.MakeArrayType(valueRank));
}
return(type);
}
return(typeof(object));
}