Enforce data added to table matches the column def type

[naleeha]

Feature Request

Description of Problem:

Context

UI (javascript) and server (Scala) has different data types and we use json to serialise messages between the two

Issues

• Numbers get serialised to int/double on the server so issues with sending long from UI
• On a double column, if user enters whole numbers, it get serialised to int
• Issues with sending date/time as these are sent as long from UI
• Need to ensure the data being added to table row matches the type expected in column definition

Potential Solutions:

Schema bases solution
#853

Using class to represent row data

• Introduce convention of creating case classes that represent data row for a table.
• Use that to try and serialise/deserialise RPC messages to the right type
• Create helper function to add a generic types to a table - e.g. table.addRow(myRowInstance)
• Explore easy ways to add tests using test object factory using the row data class