Minor API tweaks

Author: sbabcoc

src/main/java/com/nordstrom/common/jdbc/DatabaseUtils.java

@@ -761,6 +761,13 @@ public PreparedStatement getStatement() {
             return statement;
         }
 
+        public CallableStatement getCallable() {
+            if (statement instanceof CallableStatement) {
+                return (CallableStatement) statement;
+            }
+            throw new UnsupportedOperationException("The statement of this package is not a CallableStatement");
+        }
+        
         /**
          * Get the result set object of this package.
          * 

src/test/java/com/nordstrom/common/jdbc/DatabaseUtilsTest.java

@@ -170,9 +170,9 @@ public void testInOutVarargs() throws SQLException {
         ResultPackage pkg = DatabaseUtils.getResultPackage(TestSProc.INOUT_VARARGS, 5, 3, 10, 100);
 
         int[] out = new int[3];
-        out[0] = ((CallableStatement) pkg.getStatement()).getInt(2);
-        out[1] = ((CallableStatement) pkg.getStatement()).getInt(3);
-        out[2] = ((CallableStatement) pkg.getStatement()).getInt(4);
+        out[0] = pkg.getCallable().getInt(2);
+        out[1] = pkg.getCallable().getInt(3);
+        out[2] = pkg.getCallable().getInt(4);
         pkg.close();
 
         DatabaseUtils.update(TestQuery.DROP_PROC_INOUT);