javaunohelper/source/bootstrap.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21 #include <sal/log.hxx>
  22
  23 #include <osl/diagnose.h>
  24
  25 #include <rtl/bootstrap.hxx>
  26 #include <rtl/string.hxx>
  27
  28 #include <uno/lbnames.h>
  29 #include <uno/mapping.hxx>
  30 #include <uno/environment.hxx>
  31
  32 #include <cppuhelper/bootstrap.hxx>
  33
  34 #include <com/sun/star/lang/XComponent.hpp>
  35 #include <com/sun/star/uno/XComponentContext.hpp>
  36
  37 #if defined __clang__
  38 #pragma clang diagnostic push
  39 #pragma clang diagnostic ignored "-Wunknown-attributes"
  40 #endif
  41 #include <jni.h>
  42 #if defined __clang__
  43 #pragma clang diagnostic pop
  44 #endif
  45
  46 #include <jvmaccess/unovirtualmachine.hxx>
  47 #include <tools/diagnose_ex.h>
  48
  49 #include "juhx-export-functions.hxx"
  50 #include "vm.hxx"
  51
  52 using namespace ::com::sun::star;
  53 using namespace ::com::sun::star::uno;
  54
  55 namespace javaunohelper
  56 {
  57
  58 static OUString jstring_to_oustring( jstring jstr, JNIEnv * jni_env )
  59 {
  60     OSL_ASSERT( sizeof (sal_Unicode) == sizeof (jchar) );
  61     jsize len = jni_env->GetStringLength( jstr );
  62     rtl_uString * ustr =
  63         static_cast<rtl_uString *>(std::malloc( sizeof (rtl_uString) + (len * sizeof (sal_Unicode)) ));
  64     assert(ustr);
  65     jni_env->GetStringRegion( jstr, 0, len, reinterpret_cast<jchar *>(ustr->buffer) );
  66     OSL_ASSERT( !jni_env->ExceptionCheck() );
  67     ustr->refCount = 1;
  68     ustr->length = len;
  69     ustr->buffer[ len ] = '\0';
  70     return OUString( ustr, SAL_NO_ACQUIRE );
  71 }
  72
  73 }
  74
  75
  76 jobject Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap(
  77     JNIEnv * jni_env, SAL_UNUSED_PARAMETER jclass, jstring juno_rc, jobjectArray jpairs,
  78     jobject loader )
  79 {
  80     try
  81     {
  82         if (nullptr != jpairs)
  83         {
  84             jsize nPos = 0, len = jni_env->GetArrayLength( jpairs );
  85             while (nPos < len)
  86             {
  87                 // name
  88                 jstring jstr = static_cast<jstring>(jni_env->GetObjectArrayElement( jpairs, nPos ));
  89                 if (jni_env->ExceptionCheck())
  90                 {
  91                     jni_env->ExceptionClear();
  92                     throw RuntimeException( "index out of bounds?!" );
  93                 }
  94                 if (nullptr != jstr)
  95                 {
  96                     OUString name( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
  97                     // value
  98                     jstr = static_cast<jstring>(jni_env->GetObjectArrayElement( jpairs, nPos +1 ));
  99                     if (jni_env->ExceptionCheck())
 100                     {
 101                         jni_env->ExceptionClear();
 102                         throw RuntimeException( "index out of bounds?!" );
 103                     }
 104                     if (nullptr != jstr)
 105                     {
 106                         OUString value( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
 107
 108                         // set bootstrap parameter
 109                         ::rtl::Bootstrap::set( name, value );
 110                     }
 111                 }
 112                 nPos += 2;
 113             }
 114         }
 115
 116         // bootstrap uno
 117         Reference< XComponentContext > xContext;
 118         if (nullptr == juno_rc)
 119         {
 120             xContext = ::cppu::defaultBootstrap_InitialComponentContext();
 121         }
 122         else
 123         {
 124             OUString uno_rc( ::javaunohelper::jstring_to_oustring( juno_rc, jni_env ) );
 125             xContext = ::cppu::defaultBootstrap_InitialComponentContext( uno_rc );
 126         }
 127
 128         // create vm access
 129         ::rtl::Reference< ::jvmaccess::UnoVirtualMachine > vm_access(
 130             ::javaunohelper::create_vm_access( jni_env, loader ) );
 131         // wrap vm singleton entry
 132         xContext = ::javaunohelper::install_vm_singleton( xContext, vm_access );
 133
 134         // get uno envs
 135         OUString cpp_env_name = CPPU_CURRENT_LANGUAGE_BINDING_NAME;
 136         OUString java_env_name = UNO_LB_JAVA;
 137         Environment java_env, cpp_env;
 138         uno_getEnvironment(reinterpret_cast<uno_Environment **>(&cpp_env), cpp_env_name.pData, nullptr);
 139         uno_getEnvironment(reinterpret_cast<uno_Environment **>(&java_env), java_env_name.pData, vm_access.get() );
 140
 141         // map to java
 142         Mapping mapping( cpp_env.get(), java_env.get() );
 143         if (! mapping.is())
 144         {
 145             Reference< lang::XComponent > xComp( xContext, UNO_QUERY );
 146             if (xComp.is())
 147                 xComp->dispose();
 148             throw RuntimeException("cannot get mapping C++ <-> Java!" );
 149         }
 150
 151         jobject jret = static_cast<jobject>(mapping.mapInterface( xContext.get(), cppu::UnoType<decltype(xContext)>::get() ));
 152         jobject jlocal = jni_env->NewLocalRef( jret );
 153         jni_env->DeleteGlobalRef( jret );
 154
 155         return jlocal;
 156     }
 157     catch (const RuntimeException & exc)
 158     {
 159         css::uno::Any exAny( cppu::getCaughtException() );
 160         jclass c = jni_env->FindClass( "com/sun/star/uno/RuntimeException" );
 161         if (nullptr != c)
 162         {
 163             SAL_WARN("javaunohelper", "forwarding RuntimeException: " << exceptionToString(exAny) );
 164             OString cstr( OUStringToOString(
 165                               exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
 166             jni_env->ThrowNew( c, cstr.getStr() );
 167         }
 168     }
 169     catch (const Exception & exc)
 170     {
 171         css::uno::Any ex( cppu::getCaughtException() );
 172         jclass c = jni_env->FindClass( "com/sun/star/uno/Exception" );
 173         if (nullptr != c)
 174         {
 175             SAL_WARN("javaunohelper",  "forwarding Exception: " << exceptionToString(ex) );
 176             OString cstr( OUStringToOString(
 177                               exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
 178             jni_env->ThrowNew( c, cstr.getStr() );
 179         }
 180     }
 181
 182     return nullptr;
 183 }
 184
 185 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */