SourcesMixIn + implementation for Tag

Author: asobolev

+nix/Dynamic.m

@@ -16,7 +16,7 @@
         end
     end
 
-    methods (Access = protected)
+    methods (Hidden = true)
         function add_dyn_attr(obj, prop, mode)
             if nargin < 3
                 mode = 'r'; 

+nix/SourcesMixIn.m

@@ -0,0 +1,27 @@
+classdef SourcesMixIn < handle
+    %SourcesMixIn
+    % mixin class for nix entities that can be related with sources
+    
+    methods
+        function obj = SourcesMixIn()
+            obj.add_dyn_relation('sources', @nix.Source);
+        end
+        
+        function [] = add_source(obj, add_this)
+            obj.sourcesCache = nix.Utils.add_entity(obj, ...
+                add_this, 'nix.Source', 'Tag::addSource', obj.sourcesCache);
+        end;
+
+        function delCheck = remove_source(obj, del)
+            [delCheck, obj.sourcesCache] = nix.Utils.delete_entity(obj, ...
+                del, 'nix.Source', 'Tag::removeSource', obj.sourcesCache);
+        end;
+
+        function retObj = open_source(obj, id_or_name)
+            retObj = nix.Utils.open_entity(obj, ...
+                'Tag::openSource', id_or_name, @nix.Source);
+        end;
+    end
+    
+end
+

+nix/Tag.m

@@ -1,4 +1,4 @@
-classdef Tag < nix.NamedEntity & nix.MetadataMixIn
+classdef Tag < nix.NamedEntity & nix.MetadataMixIn & nix.SourcesMixIn
     %Tag nix Tag object
 
     properties (Access = protected)
@@ -8,8 +8,9 @@
 
     methods
         function obj = Tag(h)
-            [email protected](h);
+            [email protected](h); % this should be first
             [email protected]();
+            [email protected]();
 
             % assign dynamic properties
             obj.add_dyn_attr('position', 'rw');
@@ -19,7 +20,6 @@
             % assign relations
             obj.add_dyn_relation('references', @nix.DataArray);
             obj.add_dyn_relation('features', @nix.Feature);
-            obj.add_dyn_relation('sources', @nix.Source);
         end;
 
         % ------------------
@@ -69,25 +69,6 @@
             % see mkarray.cc(42)
             data = permute(tmp, length(size(tmp)):-1:1);
         end;
-        
-        % ------------------
-        % Sources methods
-        % ------------------
-
-        function [] = add_source(obj, add_this)
-            obj.sourcesCache = nix.Utils.add_entity(obj, ...
-                add_this, 'nix.Source', 'Tag::addSource', obj.sourcesCache);
-        end;
-
-        function delCheck = remove_source(obj, del)
-            [delCheck, obj.sourcesCache] = nix.Utils.delete_entity(obj, ...
-                del, 'nix.Source', 'Tag::removeSource', obj.sourcesCache);
-        end;
-
-        function retObj = open_source(obj, id_or_name)
-            retObj = nix.Utils.open_entity(obj, ...
-                'Tag::openSource', id_or_name, @nix.Source);
-        end;
 
     end;
 end