Kasper Sørensen created METAMODEL-145:
-----------------------------------------
Summary: A Column subinterface with type arguments
Key: METAMODEL-145
URL: https://issues.apache.org/jira/browse/METAMODEL-145
Project: Apache MetaModel
Issue Type: New Feature
Reporter: Kasper Sørensen
I propose to introduce a new interface to extend the Column interface. This
interface should have a type parameter, representing the value type of the
column. My suggested name would be TypedColumn<E>.
To take advantage of this type information I propose a few changes:
DataSet: Add a getValue(TypedColumn) method. When you have a typed column you
can then get values from DataSets that do not need casting:
{code}
TypedColumn<Boolean> c1 = ...
TypedColumn<String> c2 = ...
DataSet ds = ...
Boolean value1 = ds.getValue(c1);
Boolean value2 = ds.getValue(c2);
{code}
Table: Change the return type of getNumberColumns() to return TypedColumn<?
extends Number>[] instead of just Column[]. Apply same principle to other such
methods (getBooleanColumns, getLiteralColumns etc.).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
