connectivity/source/inc/java/ContextClassLoader.hxx

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  30
  31 #ifndef CONNECTIVITY_CONTEXTCLASSLOADER_HXX
  32 #define CONNECTIVITY_CONTEXTCLASSLOADER_HXX
  33
  34 #include "java/GlobalRef.hxx"
  35
  36 /** === begin UNO includes === **/
  37 /** === end UNO includes === **/
  38
  39 namespace comphelper
  40 {
  41     class ResourceBasedEventLogger;
  42 }
  43
  44 //........................................................................
  45 namespace connectivity { namespace jdbc
  46 {
  47 //........................................................................
  48
  49     //====================================================================
  50     //= ContextClassLoaderScope
  51     //====================================================================
  52     /**
  53     */
  54     class ContextClassLoaderScope
  55     {
  56     public:
  57         /** creates the instance. If isActive returns <FALSE/> afterwards, then an exception
  58             happend in the JVM, which should be raised as UNO exception by the caller
  59
  60             @param  environment
  61                 the current JNI environment
  62             @param  newClassLoader
  63                 the new class loader to set at the current thread
  64             @param  _rLoggerForErrors
  65                 the logger which should be passed to java_lang_object::ThrowLoggedSQLException in case
  66                 an error occurs
  67             @param  _rxErrorContext
  68                 the context which should be passed to java_lang_object::ThrowLoggedSQLException in case
  69                 an error occurs
  70
  71         */
  72         ContextClassLoaderScope(
  73             JNIEnv& environment,
  74             const GlobalRef< jobject >& newClassLoader,
  75             const ::comphelper::ResourceBasedEventLogger& _rLoggerForErrors,
  76             const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface >& _rxErrorContext
  77         );
  78
  79         ~ContextClassLoaderScope() { pop(true); }
  80
  81         void pop() { pop(false); }
  82
  83         bool isActive() const
  84         {
  85             return  ( m_currentThread.is() )
  86                 &&  ( m_setContextClassLoaderMethod != NULL );
  87         }
  88
  89     private:
  90         ContextClassLoaderScope(ContextClassLoaderScope &); // not defined
  91         void operator =(ContextClassLoaderScope &); // not defined
  92
  93         void pop( bool clearExceptions );
  94
  95         JNIEnv&                             m_environment;
  96         LocalRef< jobject >                 m_currentThread;
  97         LocalRef< jobject >                 m_oldContextClassLoader;
  98         jmethodID                           m_setContextClassLoaderMethod;
  99     };
 100
 101
 102 //........................................................................
 103 } } // namespace connectivity::jdbc
 104 //........................................................................
 105
 106 #endif // CONNECTIVITY_CONTEXTCLASSLOADER_HXX