summaryrefslogtreecommitdiffstats
path: root/bridges/source/jni_uno/jni_base.h
diff options
context:
space:
mode:
Diffstat (limited to 'bridges/source/jni_uno/jni_base.h')
-rw-r--r--bridges/source/jni_uno/jni_base.h260
1 files changed, 260 insertions, 0 deletions
diff --git a/bridges/source/jni_uno/jni_base.h b/bridges/source/jni_uno/jni_base.h
new file mode 100644
index 000000000..d4a937f7a
--- /dev/null
+++ b/bridges/source/jni_uno/jni_base.h
@@ -0,0 +1,260 @@
+/* -*- 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 .
+ */
+
+#ifndef INCLUDED_BRIDGES_SOURCE_JNI_UNO_JNI_BASE_H
+#define INCLUDED_BRIDGES_SOURCE_JNI_UNO_JNI_BASE_H
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <jvmaccess/unovirtualmachine.hxx>
+#include <jvmaccess/virtualmachine.hxx>
+
+#include <osl/diagnose.h>
+
+#include <rtl/alloc.h>
+#include <rtl/ustring.hxx>
+#include <sal/log.hxx>
+
+#include <uno/environment.h>
+#include <typelib/typedescription.h>
+
+
+namespace jni_uno
+{
+
+class JNI_info;
+
+struct BridgeRuntimeError
+{
+ OUString m_message;
+
+ explicit BridgeRuntimeError( OUString const & message )
+ : m_message( message )
+ {}
+};
+
+
+class JNI_context
+{
+ JNI_info const * m_jni_info;
+ JNIEnv * m_env;
+ jobject m_class_loader;
+
+ JNI_context( JNI_context const & ) = delete;
+ JNI_context& operator = ( JNI_context const &) = delete;
+
+ void java_exc_occurred() const;
+public:
+ explicit JNI_context(
+ JNI_info const * jni_info, JNIEnv * env, jobject class_loader )
+ : m_jni_info( jni_info ),
+ m_env( env ),
+ m_class_loader( class_loader )
+ {}
+
+ JNI_info const * get_info() const
+ { return m_jni_info; }
+
+ JNIEnv * operator -> () const
+ { return m_env; }
+ JNIEnv * get_jni_env() const
+ { return m_env; }
+
+ // does not handle exceptions, *classClass will be null if exception
+ // occurred:
+ void getClassForName(jclass * classClass, jmethodID * methodForName) const;
+
+ // if inException, does not handle exceptions, in which case returned value
+ // will be null if exception occurred:
+ jclass findClass(
+ char const * name, jclass classClass, jmethodID methodForName,
+ bool inException) const;
+
+ inline void ensure_no_exception() const; // throws BridgeRuntimeError
+ inline bool assert_no_exception() const; // asserts and clears exception
+
+ OUString get_stack_trace( jobject jo_exc = nullptr ) const;
+};
+
+inline void JNI_context::ensure_no_exception() const
+{
+ if (m_env->ExceptionCheck())
+ {
+ java_exc_occurred();
+ }
+}
+
+inline bool JNI_context::assert_no_exception() const
+{
+ if (m_env->ExceptionCheck())
+ {
+ SAL_WARN("bridges", "unexpected java exception occurred");
+#if OSL_DEBUG_LEVEL > 0
+ m_env->ExceptionDescribe();
+#endif
+ m_env->ExceptionClear();
+ return false;
+ }
+ return true;
+}
+
+
+class JNI_guarded_context
+ : private ::jvmaccess::VirtualMachine::AttachGuard,
+ public JNI_context
+{
+ JNI_guarded_context( JNI_guarded_context const & ) = delete;
+ JNI_guarded_context& operator = ( JNI_guarded_context const &) = delete;
+
+public:
+ explicit JNI_guarded_context(
+ JNI_info const * jni_info,
+ rtl::Reference<jvmaccess::UnoVirtualMachine> const & vm_access)
+ : AttachGuard( vm_access->getVirtualMachine() ),
+ JNI_context(
+ jni_info, AttachGuard::getEnvironment(),
+ static_cast< jobject >(vm_access->getClassLoader()) )
+ {}
+};
+
+
+class JLocalAutoRef
+{
+ JNI_context const & m_jni;
+ jobject m_jo;
+
+public:
+ explicit JLocalAutoRef( JNI_context const & jni )
+ : m_jni( jni ),
+ m_jo( nullptr )
+ {}
+ explicit JLocalAutoRef( JNI_context const & jni, jobject jo )
+ : m_jni( jni ),
+ m_jo( jo )
+ {}
+ inline JLocalAutoRef( JLocalAutoRef & auto_ref );
+ inline ~JLocalAutoRef();
+
+ jobject get() const
+ { return m_jo; }
+ bool is() const
+ { return (nullptr != m_jo); }
+ inline jobject release();
+ inline void reset( jobject jo );
+ inline JLocalAutoRef & operator = ( JLocalAutoRef & auto_ref );
+};
+
+inline JLocalAutoRef::~JLocalAutoRef()
+{
+ if (nullptr != m_jo)
+ m_jni->DeleteLocalRef( m_jo );
+}
+
+inline JLocalAutoRef::JLocalAutoRef( JLocalAutoRef & auto_ref )
+ : m_jni( auto_ref.m_jni ),
+ m_jo( auto_ref.m_jo )
+{
+ auto_ref.m_jo = nullptr;
+}
+
+inline jobject JLocalAutoRef::release()
+{
+ jobject jo = m_jo;
+ m_jo = nullptr;
+ return jo;
+}
+
+inline void JLocalAutoRef::reset( jobject jo )
+{
+ if (jo != m_jo)
+ {
+ if (nullptr != m_jo)
+ m_jni->DeleteLocalRef( m_jo );
+ m_jo = jo;
+ }
+}
+
+inline JLocalAutoRef & JLocalAutoRef::operator = ( JLocalAutoRef & auto_ref )
+{
+ assert( m_jni.get_jni_env() == auto_ref.m_jni.get_jni_env() );
+ reset( auto_ref.m_jo );
+ auto_ref.m_jo = nullptr;
+ return *this;
+}
+
+
+
+struct rtl_mem
+{
+ static void * operator new ( size_t nSize )
+ { return std::malloc( nSize ); }
+ static void operator delete ( void * mem )
+ { std::free( mem ); }
+ static void * operator new ( size_t, void * mem )
+ { return mem; }
+ static void operator delete ( void *, void * )
+ {}
+
+ static inline rtl_mem * allocate( std::size_t bytes );
+};
+
+inline rtl_mem * rtl_mem::allocate( std::size_t bytes )
+{
+ void * p = std::malloc( bytes );
+ if (nullptr == p)
+ throw BridgeRuntimeError( "out of memory!" );
+ return static_cast<rtl_mem *>(p);
+}
+
+
+class TypeDescr
+{
+ typelib_TypeDescription * m_td;
+
+ TypeDescr( TypeDescr const & ) = delete;
+ TypeDescr& operator = ( TypeDescr const & ) = delete;
+
+public:
+ inline explicit TypeDescr( typelib_TypeDescriptionReference * td_ref );
+ ~TypeDescr()
+ { TYPELIB_DANGER_RELEASE( m_td ); }
+
+ typelib_TypeDescription * get() const
+ { return m_td; }
+};
+
+inline TypeDescr::TypeDescr( typelib_TypeDescriptionReference * td_ref )
+ : m_td( nullptr )
+{
+ TYPELIB_DANGER_GET( &m_td, td_ref );
+ if (nullptr == m_td)
+ {
+ throw BridgeRuntimeError(
+ "cannot get comprehensive type description for " +
+ OUString::unacquired( &td_ref->pTypeName ) );
+ }
+}
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */