Calling a cfc through a udf

Question

Is it possible to call a cfc function through a udf, or maybe im just looking at this the wrong way but here is what im ultimately trying to do.
I have the following table:
tbl_users
=====================
uid                         name
=====================
1                         John
2                         Steve
3                         Joe
4                         Bob
Then throughout the program i am given a few of the uid, and i have to loop through them and get the names, so im trying to figure out a way to make a function so i can call it like this and it checks the db and gives me the name:
getName(uid) = returns name
Is there any easy way of doing something like this?

Answer 1

case 1: user-defined function alone
<cffunction name="getNameFromId">
    <cfargument name="id" default="1">
    <cfset var selectedUser = "">
    <cfset user = arrayNew(1)>
    <cfset user[1] = "John">
    <cfset user[2] = "Steve">
    <cfset user[3] = "Joe">
    <cfset user[4] = "Bob">
    <cfset selectedUser = user[arguments.id]>
    <cfreturn selectedUser>
</cffunction>
<cfoutput>#getNameFromId(3)#</cfoutput>
case 2: (a) content of CFM page userName.cfm
<cfset userObject = createobject("component", "User")>
<cfoutput>#userObject.getNameFromId(2)#</cfoutput>
<!--- Alternative, using cfinvoke --->
<!---
<cfinvoke component="User" method="getNameFromId" returnVariable="userName">
    <cfinvokeargument name="id" value="2">
</cfinvoke>
<cfoutput>#userName#</cfoutput>
--->
(b) The user-defined function is in a component saved as User.cfc in the same directory as the page userName.cfm
<cfcomponent displayname="User">
<cffunction name="getNameFromId">
    <cfargument name="id" default="1">
    <cfset var selectedUser = "">
    <cfset user = arrayNew(1)>
    <cfset user[1] = "John">
    <cfset user[2] = "Steve">
    <cfset user[3] = "Joe">
    <cfset user[4] = "Bob">
    <cfset selectedUser = user[arguments.id]>
    <cfreturn selectedUser>
</cffunction>
</cfcomponent>