/// <summary>
/// Try to get the mapping from MetaTree. If the data are not in the tree, try to create and add it.
/// </summary>
internal static PlcObject GetMapping(string name, ITree tree, Type t, bool allowAddingWithoutMappingAttribute = false)
{
if (string.IsNullOrWhiteSpace(name))
{
return(null);
}
var nodePathStack = new Stack <string>();
nodePathStack.Push(RootNodeName);
nodePathStack.Push(InstancesNodeName);
foreach (var part in name.Split('.'))
{
nodePathStack.Push(part);
}
var path = PlcMetaDataTreePath.CreateAbsolutePath(nodePathStack.Reverse().ToArray());
var offset = 0;
if (!tree.TryGet(path, ref offset, out var obj, true))
{
if (t == null)
{
ExceptionThrowHelper.ThrowArgumentNullException(nameof(t));
}
var mapping = t.GetTypeInfo().GetCustomAttributes <MappingAttribute>().FirstOrDefault(m => m.Name == name);
if (mapping != null)
{
nodePathStack.Pop();
var plcObj = new PlcObjectRef(name, GetMetaData(tree, t))
{
Offset = { Bytes = mapping.Offset },
Selector = mapping.Selector
};
PlcObject.AddPlcObjectToTree(plcObj, tree, PlcMetaDataTreePath.CreateAbsolutePath(nodePathStack.Reverse().ToArray()));
obj = plcObj;
}
else if (allowAddingWithoutMappingAttribute)
{
nodePathStack.Pop();
var plcObj = new PlcObjectRef(name, GetMetaData(tree, t));
PlcObject.AddPlcObjectToTree(plcObj, tree, PlcMetaDataTreePath.CreateAbsolutePath(nodePathStack.Reverse().ToArray()));
obj = plcObj;
}
else
{
ExceptionThrowHelper.ThrowInvalidMappingNameException(name);
}
}
return(obj as PlcObject);
}
/// <summary>
/// Try to get Meta data from MetaTree. If the data are not in the tree, try to create and add it.
/// All the calculation of the offsets will be made in this method. the tree has two parts, one for MetaData and one for The Mappings.
/// The mappings have only a Reference of the Meta data, so you shouldn't change the Offsets while using.
/// </summary>
private static PlcObject GetMetaData(ITree tree, Type t)
{
var nodePathStack = new Stack <string>();
var name = NormalizeTypeName(t.FullName);
nodePathStack.Push(RootNodeName);
nodePathStack.Push(MetaDataNodeName);
nodePathStack.Push(name);
var path = PlcMetaDataTreePath.CreateAbsolutePath(nodePathStack.Reverse().ToArray());
var offset = 0;
if (!tree.TryGet(path, ref offset, out var obj))
{
var byteOffset = 0;
var bitOffset = 0;
nodePathStack.Pop();
var parent = new PlcStruct(name, t);
PlcObject.AddPlcObjectToTree(parent, tree, PlcMetaDataTreePath.CreateAbsolutePath(nodePathStack.Reverse().ToArray()));
nodePathStack.Push(parent.Name);
PlcObject pred = null;
DebugOutPut("{0}{{", name);
foreach (var pi in t.GetTypeInfo().DeclaredProperties)
{
var plcObject = PlcObjectFactory.CreatePlcObject(pi);
if (plcObject is PlcArray plcObjectArray && (plcObjectArray.LeafElementType ?? plcObjectArray.ArrayType) is PlcStruct)
{
plcObjectArray.ArrayType = GetMetaData(tree, plcObjectArray.ElemenType);
}
else if (plcObject is PlcStruct)
{
plcObject = new PlcObjectRef(plcObject.Name, GetMetaData(tree, pi.PropertyType));
}
var hasCustomOffset = PlcObjectFactory.GetOffsetFromAttribute(pi, ref byteOffset, ref bitOffset);
AddPlcObject(tree, pred, plcObject, nodePathStack, ref byteOffset, ref bitOffset, hasCustomOffset);
pred = plcObject;
}
