configmgr/source/inc/autoobject.hxx

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  30
  31 #ifndef CONFIGMGR_AUTOOBJECT_HXX
  32 #define CONFIGMGR_AUTOOBJECT_HXX
  33
  34 #include "sal/config.h"
  35
  36 #include "boost/utility.hpp"
  37
  38 #include "utility.hxx"
  39
  40 namespace configmgr
  41 {
  42 //-----------------------------------------------------------------------------
  43     template < class Object >
  44     class AutoObject: private boost::noncopyable
  45     {
  46     public:
  47         AutoObject() : m_pObject(NULL) {}
  48         AutoObject(Object * _obj) : m_pObject(_obj) {}
  49         ~AutoObject() { delete m_pObject; }
  50
  51         bool is()   const;
  52         Object * get()   const;
  53         Object * getOrCreate();
  54     private:
  55         Object * internalCreate();
  56     private:
  57         Object *  m_pObject;
  58     };
  59 //-----------------------------------------------------------------------------
  60
  61     template < class Object >
  62     inline
  63     Object * AutoObject<Object>::get() const
  64     {
  65         return m_pObject;
  66     }
  67 //-----------------------------------------------------------------------------
  68
  69     template < class Object >
  70     inline
  71     bool AutoObject<Object>::is() const
  72     {
  73         return get() != NULL;
  74     }
  75 //-----------------------------------------------------------------------------
  76
  77     template < class Object >
  78     Object * AutoObject<Object>::getOrCreate()
  79     {
  80         Object * p = get();
  81         return p ? p : internalCreate();
  82     }
  83 //-----------------------------------------------------------------------------
  84
  85     template < class Object >
  86     Object * AutoObject<Object>::internalCreate()
  87     {
  88         if (m_pObject == NULL)
  89             m_pObject = new Object();
  90         return m_pObject;
  91
  92     }
  93 //-----------------------------------------------------------------------------
  94
  95 ////////////////////////////////////////////////////////////////////////////////
  96
  97 } // namespace configmgr
  98
  99 #endif
 100