introducing the Link_Ptr concept - able to fuzzy point at a link by src_id, dst_id or both

1 files changed, 23 insertions, 2 deletions

diff --git a/src-py/model/model.py b/src-py/model/model.py
index 9ee61397..701074ab 100644
--- a/src-py/model/model.py
+++ b/src-py/model/model.py
@@ -1,4 +1,4 @@
-class link():
+class Link():
     """
     documentation anchor - this class currently carries no implementation
     and only acts as a documentation anchor
@@ -6,4 +6,25 @@ class link():
     link['__src'] - meta attribute for link source
     link['__dst'] - meta attribute for link destination
     """
-    pass
+    
+    class Link_Ptr(dict):
+        def __init__(self, src_id=None, dst_id=None):
+            assert None != src_id or None != dst_id
+            
+            self['__src'] = src_id
+            self['__dst'] = dst_id
+        
+        @property
+        def src_id(self):
+            return self['__src']
+
+        @property
+        def dst_id(self):
+            return self['__dst']
+
+    @staticmethod
+    def link_ptr(src_id=None, dst_id=None):
+        """
+        init from src_id or dst_id attributes - at least one must be provided
+        """
+        return Link.Link_Ptr(src_id, dst_id)