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27*cdf0e10cSrcweir 
28*cdf0e10cSrcweir #ifndef CONNECTIVITY_LOCALREF_HXX
29*cdf0e10cSrcweir #define CONNECTIVITY_LOCALREF_HXX
30*cdf0e10cSrcweir 
31*cdf0e10cSrcweir /** === begin UNO includes === **/
32*cdf0e10cSrcweir /** === end UNO includes === **/
33*cdf0e10cSrcweir 
34*cdf0e10cSrcweir #include <jvmaccess/virtualmachine.hxx>
35*cdf0e10cSrcweir 
36*cdf0e10cSrcweir //........................................................................
37*cdf0e10cSrcweir namespace connectivity { namespace jdbc
38*cdf0e10cSrcweir {
39*cdf0e10cSrcweir //........................................................................
40*cdf0e10cSrcweir 
41*cdf0e10cSrcweir 	//====================================================================
42*cdf0e10cSrcweir 	//= LocalRef
43*cdf0e10cSrcweir 	//====================================================================
44*cdf0e10cSrcweir     /** helper class to hold a local ref to a JNI object
45*cdf0e10cSrcweir 
46*cdf0e10cSrcweir         Note that this class never actually calls NewLocalRef. It is assumed that all objects
47*cdf0e10cSrcweir         passed are already acquired with a local ref (as it usually is the case if you obtain
48*cdf0e10cSrcweir         the object from an JNI method).
49*cdf0e10cSrcweir     */
50*cdf0e10cSrcweir     template< typename T >
51*cdf0e10cSrcweir     class LocalRef
52*cdf0e10cSrcweir     {
53*cdf0e10cSrcweir     public:
54*cdf0e10cSrcweir         explicit LocalRef( JNIEnv& environment )
55*cdf0e10cSrcweir             :m_environment( environment )
56*cdf0e10cSrcweir             ,m_object( NULL )
57*cdf0e10cSrcweir         {
58*cdf0e10cSrcweir         }
59*cdf0e10cSrcweir 
60*cdf0e10cSrcweir         LocalRef( JNIEnv& environment, T object )
61*cdf0e10cSrcweir             :m_environment( environment )
62*cdf0e10cSrcweir             ,m_object( object )
63*cdf0e10cSrcweir         {
64*cdf0e10cSrcweir         }
65*cdf0e10cSrcweir 
66*cdf0e10cSrcweir         ~LocalRef()
67*cdf0e10cSrcweir         {
68*cdf0e10cSrcweir             reset();
69*cdf0e10cSrcweir         }
70*cdf0e10cSrcweir 
71*cdf0e10cSrcweir         T release()
72*cdf0e10cSrcweir         {
73*cdf0e10cSrcweir             T t = m_object;
74*cdf0e10cSrcweir             m_object = NULL;
75*cdf0e10cSrcweir             return t;
76*cdf0e10cSrcweir         }
77*cdf0e10cSrcweir 
78*cdf0e10cSrcweir         void set( T object ) { reset(); m_object = object; }
79*cdf0e10cSrcweir 
80*cdf0e10cSrcweir         void reset()
81*cdf0e10cSrcweir         {
82*cdf0e10cSrcweir             if ( m_object != NULL )
83*cdf0e10cSrcweir             {
84*cdf0e10cSrcweir                 m_environment.DeleteLocalRef( m_object );
85*cdf0e10cSrcweir                 m_object = NULL;
86*cdf0e10cSrcweir             }
87*cdf0e10cSrcweir         }
88*cdf0e10cSrcweir 
89*cdf0e10cSrcweir         JNIEnv& env() const { return m_environment; }
90*cdf0e10cSrcweir         T       get() const { return m_object; }
91*cdf0e10cSrcweir         bool    is()  const { return m_object != NULL; }
92*cdf0e10cSrcweir 
93*cdf0e10cSrcweir     private:
94*cdf0e10cSrcweir         LocalRef(LocalRef &); // not defined
95*cdf0e10cSrcweir         void operator =(LocalRef &); // not defined
96*cdf0e10cSrcweir 
97*cdf0e10cSrcweir     protected:
98*cdf0e10cSrcweir         JNIEnv& m_environment;
99*cdf0e10cSrcweir         T       m_object;
100*cdf0e10cSrcweir     };
101*cdf0e10cSrcweir 
102*cdf0e10cSrcweir //........................................................................
103*cdf0e10cSrcweir } } // namespace connectivity::jdbc
104*cdf0e10cSrcweir //........................................................................
105*cdf0e10cSrcweir 
106*cdf0e10cSrcweir #endif // CONNECTIVITY_LOCALREF_HXX
107