connectivity/source/inc/java/GlobalRef.hxx

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  30
  31 #ifndef CONNECTIVITY_GLOBALREF_HXX
  32 #define CONNECTIVITY_GLOBALREF_HXX
  33
  34 #include "java/LocalRef.hxx"
  35 #include "java/lang/Object.hxx"
  36
  37 /** === begin UNO includes === **/
  38 /** === end UNO includes === **/
  39
  40 #include <jvmaccess/virtualmachine.hxx>
  41
  42 //........................................................................
  43 namespace connectivity { namespace jdbc
  44 {
  45 //........................................................................
  46
  47     //====================================================================
  48     //= GlobalRef
  49     //====================================================================
  50     /** helper class to hold a local ref to a JNI object
  51     */
  52     template< typename T >
  53     class GlobalRef
  54     {
  55     public:
  56         GlobalRef()
  57             :m_object( NULL )
  58         {
  59         }
  60
  61         GlobalRef( const GlobalRef& _source )
  62             :m_object( NULL )
  63         {
  64             *this = _source;
  65         }
  66
  67         GlobalRef& operator=( const GlobalRef& _source )
  68         {
  69             if ( &_source == this )
  70                 return *this;
  71
  72             SDBThreadAttach t;
  73             set( t.env(), _source.get() );
  74             return *this;
  75         }
  76
  77         ~GlobalRef()
  78         {
  79             reset();
  80         }
  81
  82         void reset()
  83         {
  84             if ( m_object != NULL )
  85             {
  86                 SDBThreadAttach t;
  87                 t.env().DeleteGlobalRef( m_object );
  88                 m_object = NULL;
  89             }
  90         }
  91
  92         void set( JNIEnv& _environment, T _object )
  93         {
  94             if ( m_object != NULL )
  95                 _environment.DeleteGlobalRef( m_object );
  96             m_object = _object;
  97             if ( m_object )
  98                 m_object = static_cast< T >( _environment.NewGlobalRef( m_object ) );
  99         }
 100
 101         void set( LocalRef< T >& _object )
 102         {
 103             set( _object.env(), _object.release() );
 104         }
 105
 106         T get() const
 107         {
 108             return m_object;
 109         }
 110
 111         bool is() const
 112         {
 113             return m_object != NULL;
 114         }
 115
 116     private:
 117         T   m_object;
 118     };
 119
 120
 121 //........................................................................
 122 } } // namespace connectivity::jdbc
 123 //........................................................................
 124
 125 #endif // CONNECTIVITY_GLOBALREF_HXX