include/unitransaction.h

   1 /* -*- Mode: C++ -*-
   2  * Worldvisions Weaver Software:
   3  *   Copyright (C) 2005 Net Integration Technologies, Inc.
   4  *
   5  * Allows one to wrap a UniConf tree with a transaction model.  Use
   6  * UniTransaction::commit() to commit, and
   7  * UniTransaction::refresh() to rollback.
   8  */
   9 #ifndef _UNITRANSACTION_H
  10 #define _UNITRANSACTION_H
  11
  12 #include "unibachelorgen.h"
  13 #include "uniconfroot.h"
  14 #include "unitransactiongen.h"
  15 #include "uniunwrapgen.h"
  16
  17 /**
  18  * Wraps an existing UniConf tree with a transaction generator.
  19  */
  20 class UniTransaction : public UniConfRoot
  21 {
  22     friend class UniConf;
  23     friend class UniConf::Iter;
  24     friend class UniConf::RecursiveIter;
  25
  26 public:
  27     UniTransaction(const UniConf &base)
  28         : UniConfRoot(new UniTransactionGen(new UniBachelorGen(
  29                       new UniUnwrapGen(base))), false)
  30     {
  31     }
  32
  33     // C++ would auto-generate a "copy constructor" for this function, but
  34     // what we really want is just to wrap a new transaction around the
  35     // base, just like any other UniConf object.
  36     UniTransaction(const UniTransaction &base)
  37         : UniConfRoot(new UniTransactionGen(new UniBachelorGen(
  38                       new UniUnwrapGen(base))), false)
  39     {
  40     }
  41 };
  42
  43 #endif /* _UNITRANSACTION_H */