Learning Outcomes: Patterns, Tradeoffs
  Identify criteria for the design of a software 
  system and select patterns, create 
  frameworks, and partition software to 
  satisfy the inherent trade-offs. 
   Using GoF Patterns in 
    Iteration 3
    Finish up Template Pattern
    State Pattern
    Command Pattern
   Deployment Diagrams
                                            Q3
   Persistence Framework – a service to 
   provide object to record mapping
   In a Persistence Framework a record is 
   to an object, as a _________ is to a 
   graphical object in a 
   GUI Framework.
    Think for 15 seconds…
    Turn to a neighbor and discuss 
     it for a minute
      Recall: A Persistence Framework
        Domain                 Persistence                     Relational 
         Layer                  Framework                      Database
                              PersistenceFaçade
                                                           Name                     City
    :University               get(OID, class):Object
                              put(OID, object)             RHIT              Terre Haute
    name = Butler
    city = Indianapolis                                    Purdue        W. Lafayette
                                                           Indiana U.      Bloomington
                                                           Butler U.        Indianapolis
    University 
    object                   Store object in RDB             University Table
                                put(OID, Butler U.)
                              Retrieve from RDB
                            get(OID, University)                  (Really)
      Use Objects                (Pretend to)
                              Store as Objects              Store as Relations
   Recall: Maps between Persistent 
   Object & Database
                                                          University Table
                                                     OID           name                
                                  1                  city
        :University                                 XI001           RHIT        Terre Haute
        name = Butler                               wxx246      Purdue          W. Lafayette
        city = Indianapolis                         xxz357      Indiana U.           Bloomington
                                                    xyz123      Butler U. Indianapolis
        oid = xyz123
        Recall: Façade Design Pattern w/Brokers
                    PersistenceFacade                                                          <> 
                   getInstance( ):                                                               DBMapper
                         PersistenceFacade              class
                   get(OID, class) : Object                                                get(OID):Object
                   put(OID, Object)                                                        put(OID, Object
                      ProductSpecification                       ProductSpecification                              Manufacturer 
                             RDBMapper                                FlatFileMapper                                RDBMapper
                      get(OID):Object                             get(OID):Object                             get(OID):Object
                      put(OID, Object)                            put(OID, Object                             put(OID, Object
                         Each mapper gets and puts objects in its own unique 
                         Each mapper gets and puts objects in its own unique 
                         way, depending on the kind of data store and format.
                         way, depending on the kind of data store and format.