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  1. object Main {
  2.   def main(args: Array[String]): Unit = {
  3.   	println(connect())
  4.   }
  5.  
  6.   class IdInfo
  7.   class PasswordInfo
  8.   class ConnectionInfo
  9.  
  10.   class IOException extends RuntimeException
  11.   class AuthorizationException extends RuntimeException
  12.  
  13.   def calcIdInfo(): IdInfo = new IdInfo
  14.   def calcPwdInfo(id: IdInfo): PasswordInfo = new PasswordInfo
  15.   def calcConnInfo(id: IdInfo, pwd: PasswordInfo): ConnectionInfo = new ConnectionInfo
  16.   def verify(id:IdInfo, pwd: PasswordInfo, conn: ConnectionInfo): Unit = ()
  17.  
  18.   def connect(): (IdInfo, PasswordInfo, ConnectionInfo) = {
  19.     var idInfo: IdInfo = null
  20.     var pwdInfo: PasswordInfo = null
  21.     var connInfo: ConnectionInfo = null
  22.  
  23.     try {
  24.       idInfo = calcIdInfo()
  25.     } catch {
  26.       case ex: IOException => return null
  27.     }
  28.  
  29.     try {
  30.       pwdInfo = calcPwdInfo(idInfo)
  31.     } catch {
  32.       case ex: AuthorizationException => return null
  33.     }
  34.  
  35.     try {
  36.       connInfo = calcConnInfo(idInfo, pwdInfo)
  37.     } catch {
  38.       case ex: IOException => return null
  39.     }
  40.  
  41.     try {
  42.       verify(idInfo, pwdInfo, connInfo)
  43.     } catch {
  44.       case ex: IOException => return null
  45.       case ex: AuthorizationException => return null
  46.     }
  47.  
  48.     (idInfo, pwdInfo, connInfo)
  49.   }
  50. }
Success #stdin #stdout 0.38s 382016KB
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Standard input is empty
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(Main$IdInfo@9a7754,Main$PasswordInfo@1105002,Main$ConnectionInfo@1f4d7c0)
https://ideone.com/KJS1tn
language:
Scala (scala 2.12.8)
created:
10 years ago
visibility:
public

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