Add required definition in class of Input.

As a template designer;
I want to know if the parameters is missed when deploy a template, but
currently there is not validation about the required parameters;
So i add property in class of Input, and validate the require parameter.
Note: the patch will submit to Openstack community too.

JIRA:PARSER-88

Change-Id: I5763a18da4037b0f81a55b8c8d83414e685b03d2
Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>

1 files changed, 7 insertions, 2 deletions

diff --git a/tosca2heat/tosca-parser/toscaparser/parameters.py b/tosca2heat/tosca-parser/toscaparser/parameters.py
index 1d2cb29..ca8e697 100644
--- a/tosca2heat/tosca-parser/toscaparser/parameters.py
+++ b/tosca2heat/tosca-parser/toscaparser/parameters.py
@@ -35,11 +35,18 @@ class Input(object):
         self.name = name
         self.schema = Schema(name, schema_dict)
 
+        self._validate_field()
+        self.validate_type(self.type)
+
     @property
     def type(self):
         return self.schema.type
 
     @property
+    def required(self):
+        return self.schema.required
+
+    @property
     def description(self):
         return self.schema.description
 
@@ -52,8 +59,6 @@ class Input(object):
         return self.schema.constraints
 
     def validate(self, value=None):
-        self._validate_field()
-        self.validate_type(self.type)
         if value is not None:
             self._validate_value(value)