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Diffstat (limited to '')
-rw-r--r-- | connectivity/source/drivers/jdbc/ContextClassLoader.cxx | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/connectivity/source/drivers/jdbc/ContextClassLoader.cxx b/connectivity/source/drivers/jdbc/ContextClassLoader.cxx new file mode 100644 index 000000000..50e6bc632 --- /dev/null +++ b/connectivity/source/drivers/jdbc/ContextClassLoader.cxx @@ -0,0 +1,111 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <java/ContextClassLoader.hxx> +#include <java/lang/Object.hxx> + + +namespace connectivity::jdbc +{ + + + using ::com::sun::star::uno::Reference; + using ::com::sun::star::uno::XInterface; + + using ::connectivity::java_lang_Object; + + ContextClassLoaderScope::ContextClassLoaderScope( JNIEnv& environment, const GlobalRef< jobject >& newClassLoader, + const ::comphelper::EventLogger& _rLoggerForErrors, const Reference< XInterface >& _rxErrorContext ) + :m_environment( environment ) + ,m_currentThread( environment ) + ,m_oldContextClassLoader( environment ) + ,m_setContextClassLoaderMethod( nullptr ) + { + if ( !newClassLoader.is() ) + return; + + do // artificial loop for easier flow control + { + + LocalRef< jclass > threadClass( m_environment ); + threadClass.set( m_environment.FindClass( "java/lang/Thread" ) ); + if ( !threadClass.is() ) + break; + + jmethodID currentThreadMethod( m_environment.GetStaticMethodID( + threadClass.get(), "currentThread", "()Ljava/lang/Thread;" ) ); + if ( currentThreadMethod == nullptr ) + break; + + m_currentThread.set( m_environment.CallStaticObjectMethod( threadClass.get(), currentThreadMethod ) ); + if ( !m_currentThread.is() ) + break; + + jmethodID getContextClassLoaderMethod( m_environment.GetMethodID( + threadClass.get(), "getContextClassLoader", "()Ljava/lang/ClassLoader;" ) ); + if ( getContextClassLoaderMethod == nullptr ) + break; + m_oldContextClassLoader.set( m_environment.CallObjectMethod( m_currentThread.get(), getContextClassLoaderMethod ) ); + LocalRef< jthrowable > throwable( m_environment, m_environment.ExceptionOccurred() ); + if ( throwable.is() ) + break; + + m_setContextClassLoaderMethod = m_environment.GetMethodID( + threadClass.get(), "setContextClassLoader", "(Ljava/lang/ClassLoader;)V" ); + if ( m_setContextClassLoaderMethod == nullptr ) + break; + + } + while ( false ); + + if ( !isActive() ) + { + java_lang_Object::ThrowLoggedSQLException( _rLoggerForErrors, &environment, _rxErrorContext ); + return; + } + + // set the new class loader + m_environment.CallObjectMethod( m_currentThread.get(), m_setContextClassLoaderMethod, newClassLoader.get() ); + LocalRef< jthrowable > throwable( m_environment, m_environment.ExceptionOccurred() ); + if ( throwable.is() ) + { + m_currentThread.reset(); + m_setContextClassLoaderMethod = nullptr; + java_lang_Object::ThrowLoggedSQLException( _rLoggerForErrors, &environment, _rxErrorContext ); + } + } + + + ContextClassLoaderScope::~ContextClassLoaderScope() + { + if ( isActive() ) + { + LocalRef< jobject > currentThread( m_currentThread.env(), m_currentThread.release() ); + jmethodID setContextClassLoaderMethod( m_setContextClassLoaderMethod ); + m_setContextClassLoaderMethod = nullptr; + + m_environment.CallObjectMethod( currentThread.get(), setContextClassLoaderMethod, m_oldContextClassLoader.get() ); + m_environment.ExceptionClear(); + } + } + +} // namespace connectivity::jdbc + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |