Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef CONNECTIVITY_GLOBALREF_HXX
      21             : #define CONNECTIVITY_GLOBALREF_HXX
      22             : 
      23             : #include "java/LocalRef.hxx"
      24             : #include "java/lang/Object.hxx"
      25             : 
      26             : #include <jvmaccess/virtualmachine.hxx>
      27             : 
      28             : 
      29             : namespace connectivity { namespace jdbc
      30             : {
      31             : 
      32             : 
      33             : 
      34             :     //= GlobalRef
      35             : 
      36             :     /** helper class to hold a local ref to a JNI object
      37             :     */
      38             :     template< typename T >
      39             :     class GlobalRef
      40             :     {
      41             :     public:
      42           0 :         GlobalRef()
      43           0 :             :m_object( NULL )
      44             :         {
      45           0 :         }
      46             : 
      47           0 :         GlobalRef( const GlobalRef& _source )
      48           0 :             :m_object( NULL )
      49             :         {
      50           0 :             *this = _source;
      51           0 :         }
      52             : 
      53           0 :         GlobalRef& operator=( const GlobalRef& _source )
      54             :         {
      55           0 :             if ( &_source == this )
      56           0 :                 return *this;
      57             : 
      58           0 :             SDBThreadAttach t;
      59           0 :             set( t.env(), _source.get() );
      60           0 :             return *this;
      61             :         }
      62             : 
      63           0 :         ~GlobalRef()
      64             :         {
      65           0 :             reset();
      66           0 :         }
      67             : 
      68           0 :         void reset()
      69             :         {
      70           0 :             if ( m_object != NULL )
      71             :             {
      72           0 :                 SDBThreadAttach t;
      73           0 :                 t.env().DeleteGlobalRef( m_object );
      74           0 :                 m_object = NULL;
      75             :             }
      76           0 :         }
      77             : 
      78           0 :         void set( JNIEnv& _environment, T _object )
      79             :         {
      80           0 :             if ( m_object != NULL )
      81           0 :                 _environment.DeleteGlobalRef( m_object );
      82           0 :             m_object = _object;
      83           0 :             if ( m_object )
      84           0 :                 m_object = static_cast< T >( _environment.NewGlobalRef( m_object ) );
      85           0 :         }
      86             : 
      87           0 :         void set( LocalRef< T >& _object )
      88             :         {
      89           0 :             set( _object.env(), _object.release() );
      90           0 :         }
      91             : 
      92           0 :         T get() const
      93             :         {
      94           0 :             return m_object;
      95             :         }
      96             : 
      97           0 :         bool is() const
      98             :         {
      99           0 :             return m_object != NULL;
     100             :         }
     101             : 
     102             :     private:
     103             :         T   m_object;
     104             :     };
     105             : 
     106             : 
     107             : 
     108             : } } // namespace connectivity::jdbc
     109             : 
     110             : 
     111             : #endif // CONNECTIVITY_GLOBALREF_HXX
     112             : 
     113             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */