Add validation to parameter/property

[wing328]

We want to add validation (e.g. maximum, minimum, pattern, etc) to parameters and model properties.

If anyone is interested in adding the property/parameter validation to a particular language, please reply to let us know.

• Android
• C++
• C#
• Clojure
• Dart
• Flash
• Go
• Javascript
• Java
• ObjC
• Perl
• PHP ([PHP] Php parameter validation in model #2778, [PHP] add parameter validation in methord call #2733)
• Python ([Python] Add validation to Python client #2794)
• Ruby ([Ruby] Add parameter validation in method call #2697, [Ruby] Add more validation rules to Ruby models #2695)
• Swift
• Scala
• TypeScript