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..3ab1b88eb
--- /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: */