Columns

- Refactored column objects to contain a ::validate method, for the
  validation of incoming data.
- Context.columns is now a vector of one of each column object,
  indexed by attribute name, for validation purposes.

src/columns/ColEntry.cpp

@@ -33,8 +33,8 @@
 ////////////////////////////////////////////////////////////////////////////////
 ColumnEntry::ColumnEntry ()
 {
+  _name      = "entry";
   _label     = STRING_COLUMN_LABEL_ADDED;
-  _attribute = "entry";
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -42,6 +42,12 @@ ColumnEntry::~ColumnEntry ()
 {
 }
 
+////////////////////////////////////////////////////////////////////////////////
+bool ColumnEntry::validate (std::string& value)
+{
+  return ColumnDate::validate (value);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Overriden so that style <----> label are linked.
 // Note that you can not determine which gets called first.