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Diffstat (limited to 'connectivity/source/inc/java/LocalRef.hxx')
-rw-r--r-- | connectivity/source/inc/java/LocalRef.hxx | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/connectivity/source/inc/java/LocalRef.hxx b/connectivity/source/inc/java/LocalRef.hxx new file mode 100644 index 000000000000..fb4cb6588635 --- /dev/null +++ b/connectivity/source/inc/java/LocalRef.hxx @@ -0,0 +1,109 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +#ifndef CONNECTIVITY_LOCALREF_HXX +#define CONNECTIVITY_LOCALREF_HXX + +/** === begin UNO includes === **/ +/** === end UNO includes === **/ + +#include <jvmaccess/virtualmachine.hxx> + +//........................................................................ +namespace connectivity { namespace jdbc +{ +//........................................................................ + + //==================================================================== + //= LocalRef + //==================================================================== + /** helper class to hold a local ref to a JNI object + + Note that this class never actually calls NewLocalRef. It is assumed that all objects + passed are already acquired with a local ref (as it usually is the case if you obtain + the object from an JNI method). + */ + template< typename T > + class LocalRef + { + public: + explicit LocalRef( JNIEnv& environment ) + :m_environment( environment ) + ,m_object( NULL ) + { + } + + LocalRef( JNIEnv& environment, T object ) + :m_environment( environment ) + ,m_object( object ) + { + } + + ~LocalRef() + { + reset(); + } + + T release() + { + T t = m_object; + m_object = NULL; + return t; + } + + void set( T object ) { reset(); m_object = object; } + + void reset() + { + if ( m_object != NULL ) + { + m_environment.DeleteLocalRef( m_object ); + m_object = NULL; + } + } + + JNIEnv& env() const { return m_environment; } + T get() const { return m_object; } + bool is() const { return m_object != NULL; } + + private: + LocalRef(LocalRef &); // not defined + void operator =(LocalRef &); // not defined + + protected: + JNIEnv& m_environment; + T m_object; + }; + +//........................................................................ +} } // namespace connectivity::jdbc +//........................................................................ + +#endif // CONNECTIVITY_LOCALREF_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |