1*cdf0e10cSrcweir /************************************************************************* 2*cdf0e10cSrcweir * 3*cdf0e10cSrcweir * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4*cdf0e10cSrcweir * 5*cdf0e10cSrcweir * Copyright 2000, 2010 Oracle and/or its affiliates. 6*cdf0e10cSrcweir * 7*cdf0e10cSrcweir * OpenOffice.org - a multi-platform office productivity suite 8*cdf0e10cSrcweir * 9*cdf0e10cSrcweir * This file is part of OpenOffice.org. 10*cdf0e10cSrcweir * 11*cdf0e10cSrcweir * OpenOffice.org is free software: you can redistribute it and/or modify 12*cdf0e10cSrcweir * it under the terms of the GNU Lesser General Public License version 3 13*cdf0e10cSrcweir * only, as published by the Free Software Foundation. 14*cdf0e10cSrcweir * 15*cdf0e10cSrcweir * OpenOffice.org is distributed in the hope that it will be useful, 16*cdf0e10cSrcweir * but WITHOUT ANY WARRANTY; without even the implied warranty of 17*cdf0e10cSrcweir * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18*cdf0e10cSrcweir * GNU Lesser General Public License version 3 for more details 19*cdf0e10cSrcweir * (a copy is included in the LICENSE file that accompanied this code). 20*cdf0e10cSrcweir * 21*cdf0e10cSrcweir * You should have received a copy of the GNU Lesser General Public License 22*cdf0e10cSrcweir * version 3 along with OpenOffice.org. If not, see 23*cdf0e10cSrcweir * <http://www.openoffice.org/license.html> 24*cdf0e10cSrcweir * for a copy of the LGPLv3 License. 25*cdf0e10cSrcweir * 26*cdf0e10cSrcweir ************************************************************************/ 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