// This code determines if any defined event should be triggered.
// For all such events, it executes the statements associated with
// them.

Main {
  traversal doEvents (EventVisitor) {
    through Event
    through {Once, Yearly, Monthly}
    to *;
  }
}

// a shortcut for getting the Eventname string
Eventname {
  public String toString() {{
    return get_ident().toString();    
  }}
}


EventVisitor  {
  {{
    boolean matches;
    boolean matches_year;  
    boolean matches_month;
    boolean add_name_if_matches;
    String  names = new String();
  }}

  public String getNames() {{
    return names;
  }}

  before Event {{
    matches = false;
    add_name_if_matches = true;
  }}

  after Event {{
    if (matches) {
      // Add to the list of matches
      if (add_name_if_matches) {
        names = names + " " + host.get_eventname().toString();
      }

      // execute statements associated with this event
      host.get_statements().doStatements(new StatementVisitor());
    }
  }}

  before Year {{
    matches_year = (year == host.get_integer().doubleValue());
  }}

  before Month {{
    matches_month = (month == host.getMonth());
  }}

  after Monthly {{
    matches = true; // done all the time
    add_name_if_matches = false; // no need to print this clutter
  }}

  after Yearly {{
    matches = matches_month; 
  }}

  after Date {{
    matches = matches_year && matches_month;
  }}

  after Eventname {{
    // Events with names are implemented as boolean-valued trigger symbols
    Symbol sym = Main.symbolTable.findSymbol(host.toString());
    if (sym == null) {
      System.out.println ("Error: unknown event " + host.toString());
      Main.stopSimulation = true;
    } else {
      matches = (sym.getValue() == 1);
    }
  }}
}