return a copy of the selection params in selection.getParams() and

selection_tool.getSelectionParamsFor, to prevent the callers to modify
selection params without using the api


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@30862 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/Selection.py

@@ -257,12 +257,9 @@ class Selection(Acquisition.Implicit, Traversable, Persistent):
         """
           Get a dictionary of parameters in this selection.
         """
-        #LOG('getParams',0,'params: %s' % str(self.params))
-        if self.params is None:
+        if not isinstance(self.params, dict):
           self.params = {}
-        if type(self.params) != type({}):
-          self.params = {}
-        return self.params
+        return self.params.copy()
 
     security.declarePublic('getSortOrder')
     def getSortOrder(self):

product/ERP5Form/Tool/SelectionTool.py

@@ -258,14 +258,12 @@ class SelectionTool( BaseTool, UniqueObject, SimpleItem ):
       """
         Returns the params in the selection
       """
-      if params is None: params = {}
+      if params is None:
+        params = {}
       selection = self.getSelectionFor(selection_name, REQUEST=REQUEST)
       if selection is not None:
-        if len(selection.params) > 0:
+        if selection.params:
           return selection.getParams()
-        else:
-          return params
-      else:
       return params
 
     # backward compatibility