Question

I have a Sql ResultSet from a query. It has following fields: username, department, ..responsibility.
There are repeated username with different values for deptmt and responsblty. I want to get a map/list of unique usernames with a list of departments and responsibilities for each user in the resultset

So if

       resultset =     (Sam, dept1,.. resp1),
                       (Tom, dept1,..resp3),
                       (Sam,dept2,..resp2),
                       (Tom,dept3,..resp3)...etc

the output should be

 finalList = [["Sam", "dept1,dept2", "resp1,resp2"],["Tom", "dept1,dept3", "resp3"]]

Things to note:
1) There may be n columns which are variable (column list read from a property file) so the code to be adaptable. _ not reqired for now, its a fixed list right now
2)All values enclosed in double quotes and seperated by comma.
3) For tom responsibility contains only resp3 since its repeated…i.e unique values in the list.

How do I convert the resultset?
Thanks

Answer 1

A shorter alternative to Bill’s solution would be:

def data = [ ['Sam', 'dept1','resp1'],
            ['Tom', 'dept1','resp3'],
            ['Sam', 'dept2','resp2'],
            ['Tom', 'dept2','resp4'] ]

def output = data.groupBy { it[0] }.collect { name, vals -> 
  $/"$name", "${vals*.getAt( 1 ).join(',')}", "${vals*.getAt( 2 ).join(',')}"/$
}

output.each {
  println it
}

Which prints:

"Sam", "dept1,dept2", "resp1,resp2"
"Tom", "dept1,dept2", "resp3,resp4"