interface Email{                                    //( 1)
  public String getFrom();                          //( 2)
  public String getMessage();                       //( 3)
}                                                   //( 4)
// ##############################################   //( 5)
class TextEmail implements Email{                   //( 6)
  private String from, message;                     //( 7)
  public TextEmail(String from, String message){    //( 8)
    this.from = from;                               //( 9)
    this.message = message;                         //(10)
  }                                                 //(11)
  public String getFrom()   { return from;    }     //(12)
  public String getMessage(){ return message; }     //(13)
}                                                   //(14)
// ##############################################   //(15)
class Filter{                                       //(16)
  public boolean check(Email r) {return true;}      //(17)
  public void process(Email e){}                    //(18)
}                                                   //(19)
// ##############################################   //(20)
class PatternFilter extends Filter{                 //(21)
  private String pattern;                           //(22)
  public PatternFilter(String pattern){             //(23)
    this.pattern = pattern;                         //(24)
  }                                                 //(25)
  public boolean check(Email e){                    //(26)
    return (e.getFrom() + e.getMessage()).          //(27)
            matches(pattern);                       //(28)
  }                                                 //(29)
}                                                   //(30)
// ##############################################   //(31)
class FolderFilter extends PatternFilter{           //(32)
  private String folder;                            //(33)
  public FolderFilter(String f,String p){           //(34)
    super(p);                                       //(35)
    this.folder = f;                                //(36)
  }                                                 //(37)
  public void process(Email e){                     //(38)
    System.out.println("Moved to "+folder);         //(39)
  }                                                 //(40)
}                                                   //(41)
// ##############################################   //(42)
class PriorityFilter extends PatternFilter{         //(43)
  public PriorityFilter(String p){                  //(44)
    super(p);                                       //(45)
  }                                                 //(46)
  public void process(Email e){                     //(47)
    System.out.println("Marked as important");      //(48)
  }                                                 //(49)
}                                                   //(50)
// ##############################################   //(51)
class GroupFilter extends Filter{                   //(52)
  class Node{                                       //(53)
    Filter filter;                                  //(54)
    Node next;                                      //(55)
    Node(Filter filter, Node next){                 //(56)
      this.filter = filter;                         //(57)
      this.next = next;                             //(58)
    }                                               //(59)
  }                                                 //(60)
  Node node;                                        //(61)
  public boolean check(Email e){                    //(62)
    Node n = this.node;                             //(63)
    while(n!=null){                                 //(64)
      if(n.filter.check(e)) return true;            //(65)
      n = n.next;                                   //(66)
    }                                               //(67)
    return false;                                   //(68)
  }                                                 //(69)
  public void process(Email e){                     //(70)
    Node n = this.node;                             //(71)
    boolean r = false;                              //(72)
    while(n!=null){                                 //(73)
      if(n.filter.check(e)){                        //(74)
        n.filter.process(e);                        //(75)
        r = true;                                   //(76)
      }                                             //(77)
      n = n.next;                                   //(78)
    }                                               //(79)
    if(!r) throw new RuntimeException(              //(80)
      "Cannot process message");                    //(81)
  }                                                 //(82)
  public void setNext(Filter filter){               //(83)
    this.node = new Node(filter,this.node);         //(84)
  }                                                 //(85)
}                                                   //(86)
// ##############################################   //(87)
class EmailProcessor{                               //(88)
  GroupFilter filter = new GroupFilter();           //(89)
  public void addFilter(Filter filter){             //(90)
    this.filter.setNext(filter);                    //(91)
  }                                                 //(92)
  public void process(Email mail){                  //(93)
    System.out.println("%%%->\nNew message from "   //(94)
      + mail.getFrom() + "\nMessage: "              //(95)
      + mail.getMessage());                         //(96)
    filter.process(mail);                           //(97)
  }                                                 //(98)
}                                                   //(99)
// ##############################################   //(100)
class Test{                                         //(101)
  public static EmailProcessor init(){              //(102)
    EmailProcessor p = new EmailProcessor();        //(103)
    Filter[] filters = {                            //(104)
      new Filter(),                                 //(105)
      new FolderFilter("work","(.*)company(.*)"),   //(106)
      new PriorityFilter("(.*)money(.*)") };        //(107)
    for(Filter f : filters) p.addFilter(f);         //(108)
    return p;                                       //(109)
  }                                                 //(110)
  public static void main(String[] args){           //(111)
  try{                                              //(112)
    EmailProcessor p = init();                      //(113)
    Email m = new TextEmail(                        //(114)
      "noone@gmail.com","You won a lot of money!"); //(115)
    Email b = new TextEmail(                        //(116)
      "boss@company.com","You got promoted!");      //(117)
    Email h = new TextEmail(                        //(118)
      "hater@facebook.com","I like you!");          //(119)
    Email[] inbox = {m,b,h};                        //(120)
    for(Email mail : inbox) p.process(mail);        //(121)
    p.process(new Email(){                          //(122)
      public String getFrom(){ return "#@#"; }      //(123)
      public String getMessage(){return "?!?";}});  //(124)
  }catch(Exception e){                              //(125)
    System.out.println(e.getMessage());             //(126)
  }                                                 //(127)
 }                                                  //(128)
}                                                   //(129)