Validate parameter options based on Type

See: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/parameters-section-structure.html
ldesiqueira · Aug 22, 2015 · bc2898c · bc2898c
1 parent c48dd96
commit bc2898c
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/troposphere/__init__.py b/troposphere/__init__.py
@@ -467,3 +467,23 @@ class Parameter(AWSDeclaration):
         'Description': (basestring, False),
         'ConstraintDescription': (basestring, False),
     }
+
+    def validate(self):
+        if self.properties['Type'] == 'String':
+            if 'AllowedPattern' in self.properties:
+                raise ValueError("AllowedPattern can only be used with "
+                                 "parameters of the String type.")
+            if 'MaxLength' in self.properties:
+                raise ValueError("MaxLength can only be used with "
+                                 "parameters of the String type.")
+            if 'MinLength' in self.properties:
+                raise ValueError("MinLength can only be used with "
+                                 "parameters of the String type.")
+        if self.properties['Type'] == 'Number':
+            if 'MaxValue' in self.properties:
+                raise ValueError("MaxValue can only be used with "
+                                 "parameters of the Number type.")
+            if 'MinValue' in self.properties:
+                raise ValueError("MinValue can only be used with "
+                                 "parameters of the Number type.")
+