part_fctry: change CustomPartClass contruct to load()

Steve Canny · Steve Canny · commit 4dca747d310a · 2013-10-20T14:16:28.000-07:00
Use a classmethod constructor (.load()) for CustomPartClass rather than
constructing directly. This allows custom part class to do some
pre-processing before actual construction, and keeping its __init__()
method clean, containing only simple assignments to state vars.
diff --git a/opc/package.py b/opc/package.py
@@ -172,7 +172,7 @@ class PartFactory(object):
     def __new__(cls, partname, content_type, blob):
         if content_type in PartFactory.part_type_for:
             CustomPartClass = PartFactory.part_type_for[content_type]
-            return CustomPartClass(partname, content_type, blob)
+            return CustomPartClass.load(partname, content_type, blob)
         return Part(partname, content_type, blob)
 
 
