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
  48 #include "juhx-export-functions.hxx"
  49 #include "vm.hxx"
  50
  51 using namespace ::com::sun::star;
  52 using namespace ::com::sun::star::uno;
  53
  54 namespace javaunohelper
  55 {
  56
  57 static OUString jstring_to_oustring( jstring jstr, JNIEnv * jni_env )
  58 {
  59     OSL_ASSERT( sizeof (sal_Unicode) == sizeof (jchar) );
  60     jsize len = jni_env->GetStringLength( jstr );
  61     rtl_uString * ustr =
  62         static_cast<rtl_uString *>(std::malloc( sizeof (rtl_uString) + (len * sizeof (sal_Unicode)) ));
  63     assert(ustr);
  64     jni_env->GetStringRegion( jstr, 0, len, reinterpret_cast<jchar *>(ustr->buffer) );
  65     OSL_ASSERT( !jni_env->ExceptionCheck() );
  66     ustr->refCount = 1;
  67     ustr->length = len;
  68     ustr->buffer[ len ] = '\0';
  69     return OUString( ustr, SAL_NO_ACQUIRE );
  70 }
  71
  72 }
  73
  74
  75 jobject Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap(
  76     JNIEnv * jni_env, SAL_UNUSED_PARAMETER jclass, jstring juno_rc, jobjectArray jpairs,
  77     jobject loader )
  78 {
  79     try
  80     {
  81         if (nullptr != jpairs)
  82         {
  83             jsize nPos = 0, len = jni_env->GetArrayLength( jpairs );
  84             while (nPos < len)
  85             {
  86                 // name
  87                 jstring jstr = static_cast<jstring>(jni_env->GetObjectArrayElement( jpairs, nPos ));
  88                 if (jni_env->ExceptionCheck())
  89                 {
  90                     jni_env->ExceptionClear();
  91                     throw RuntimeException( "index out of bounds?!" );
  92                 }
  93                 if (nullptr != jstr)
  94                 {
  95                     OUString name( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
  96                     // value
  97                     jstr = static_cast<jstring>(jni_env->GetObjectArrayElement( jpairs, nPos +1 ));
  98                     if (jni_env->ExceptionCheck())
  99                     {
 100                         jni_env->ExceptionClear();
 101                         throw RuntimeException( "index out of bounds?!" );
 102                     }
 103                     if (nullptr != jstr)
 104                     {
 105                         OUString value( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
 106
 107                         // set bootstrap parameter
 108                         ::rtl::Bootstrap::set( name, value );
 109                     }
 110                 }
 111                 nPos += 2;
 112             }
 113         }
 114
 115         // bootstrap uno
 116         Reference< XComponentContext > xContext;
 117         if (nullptr == juno_rc)
 118         {
 119             xContext = ::cppu::defaultBootstrap_InitialComponentContext();
 120         }
 121         else
 122         {
 123             OUString uno_rc( ::javaunohelper::jstring_to_oustring( juno_rc, jni_env ) );
 124             xContext = ::cppu::defaultBootstrap_InitialComponentContext( uno_rc );
 125         }
 126
 127         // create vm access
 128         ::rtl::Reference< ::jvmaccess::UnoVirtualMachine > vm_access(
 129             ::javaunohelper::create_vm_access( jni_env, loader ) );
 130         // wrap vm singleton entry
 131         xContext = ::javaunohelper::install_vm_singleton( xContext, vm_access );
 132
 133         // get uno envs
 134         OUString cpp_env_name = CPPU_CURRENT_LANGUAGE_BINDING_NAME;
 135         OUString java_env_name = UNO_LB_JAVA;
 136         Environment java_env, cpp_env;
 137         uno_getEnvironment(reinterpret_cast<uno_Environment **>(&cpp_env), cpp_env_name.pData, nullptr);
 138         uno_getEnvironment(reinterpret_cast<uno_Environment **>(&java_env), java_env_name.pData, vm_access.get() );
 139
 140         // map to java
 141         Mapping mapping( cpp_env.get(), java_env.get() );
 142         if (! mapping.is())
 143         {
 144             Reference< lang::XComponent > xComp( xContext, UNO_QUERY );
 145             if (xComp.is())
 146                 xComp->dispose();
 147             throw RuntimeException("cannot get mapping C++ <-> Java!" );
 148         }
 149
 150         jobject jret = static_cast<jobject>(mapping.mapInterface( xContext.get(), cppu::UnoType<decltype(xContext)>::get() ));
 151         jobject jlocal = jni_env->NewLocalRef( jret );
 152         jni_env->DeleteGlobalRef( jret );
 153
 154         return jlocal;
 155     }
 156     catch (const RuntimeException & exc)
 157     {
 158         jclass c = jni_env->FindClass( "com/sun/star/uno/RuntimeException" );
 159         if (nullptr != c)
 160         {
 161             SAL_WARN("javaunohelper", "forwarding RuntimeException: " << exc );
 162             OString cstr( OUStringToOString(
 163                               exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
 164             jni_env->ThrowNew( c, cstr.getStr() );
 165         }
 166     }
 167     catch (const Exception & exc)
 168     {
 169         jclass c = jni_env->FindClass( "com/sun/star/uno/Exception" );
 170         if (nullptr != c)
 171         {
 172             SAL_WARN("javaunohelper",  "forwarding Exception: " << exc );
 173             OString cstr( OUStringToOString(
 174                               exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
 175             jni_env->ThrowNew( c, cstr.getStr() );
 176         }
 177     }
 178
 179     return nullptr;
 180 }
 181
 182 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */