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 #include <jni.h>
  38 #include <jvmaccess/unovirtualmachine.hxx>
  39 #include <tools/diagnose_ex.h>
  40
  41 #include "juhx-export-functions.hxx"
  42 #include "vm.hxx"
  43
  44 using namespace ::com::sun::star;
  45 using namespace ::com::sun::star::uno;
  46
  47 namespace javaunohelper
  48 {
  49
  50 static OUString jstring_to_oustring( jstring jstr, JNIEnv * jni_env )
  51 {
  52     OSL_ASSERT( sizeof (sal_Unicode) == sizeof (jchar) );
  53     jsize len = jni_env->GetStringLength( jstr );
  54     rtl_uString * ustr =
  55         static_cast<rtl_uString *>(std::malloc( sizeof (rtl_uString) + (len * sizeof (sal_Unicode)) ));
  56     assert(ustr);
  57     jni_env->GetStringRegion( jstr, 0, len, reinterpret_cast<jchar *>(ustr->buffer) );
  58     OSL_ASSERT( !jni_env->ExceptionCheck() );
  59     ustr->refCount = 1;
  60     ustr->length = len;
  61     ustr->buffer[ len ] = '\0';
  62     return OUString( ustr, SAL_NO_ACQUIRE );
  63 }
  64
  65 }
  66
  67
  68 jobject Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap(
  69     JNIEnv * jni_env, SAL_UNUSED_PARAMETER jclass, jstring juno_rc, jobjectArray jpairs,
  70     jobject loader )
  71 {
  72     try
  73     {
  74         if (nullptr != jpairs)
  75         {
  76             jsize nPos = 0, len = jni_env->GetArrayLength( jpairs );
  77             while (nPos < len)
  78             {
  79                 // name
  80                 jstring jstr = static_cast<jstring>(jni_env->GetObjectArrayElement( jpairs, nPos ));
  81                 if (jni_env->ExceptionCheck())
  82                 {
  83                     jni_env->ExceptionClear();
  84                     throw RuntimeException( "index out of bounds?!" );
  85                 }
  86                 if (nullptr != jstr)
  87                 {
  88                     OUString name( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
  89                     // value
  90                     jstr = static_cast<jstring>(jni_env->GetObjectArrayElement( jpairs, nPos +1 ));
  91                     if (jni_env->ExceptionCheck())
  92                     {
  93                         jni_env->ExceptionClear();
  94                         throw RuntimeException( "index out of bounds?!" );
  95                     }
  96                     if (nullptr != jstr)
  97                     {
  98                         OUString value( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
  99
 100                         // set bootstrap parameter
 101                         ::rtl::Bootstrap::set( name, value );
 102                     }
 103                 }
 104                 nPos += 2;
 105             }
 106         }
 107
 108         // bootstrap uno
 109         Reference< XComponentContext > xContext;
 110         if (nullptr == juno_rc)
 111         {
 112             xContext = ::cppu::defaultBootstrap_InitialComponentContext();
 113         }
 114         else
 115         {
 116             OUString uno_rc( ::javaunohelper::jstring_to_oustring( juno_rc, jni_env ) );
 117             xContext = ::cppu::defaultBootstrap_InitialComponentContext( uno_rc );
 118         }
 119
 120         // create vm access
 121         ::rtl::Reference< ::jvmaccess::UnoVirtualMachine > vm_access(
 122             ::javaunohelper::create_vm_access( jni_env, loader ) );
 123         // wrap vm singleton entry
 124         xContext = ::javaunohelper::install_vm_singleton( xContext, vm_access );
 125
 126         // get uno envs
 127         OUString cpp_env_name = CPPU_CURRENT_LANGUAGE_BINDING_NAME;
 128         OUString java_env_name = UNO_LB_JAVA;
 129         Environment java_env, cpp_env;
 130         uno_getEnvironment(reinterpret_cast<uno_Environment **>(&cpp_env), cpp_env_name.pData, nullptr);
 131         uno_getEnvironment(reinterpret_cast<uno_Environment **>(&java_env), java_env_name.pData, vm_access.get() );
 132
 133         // map to java
 134         Mapping mapping( cpp_env.get(), java_env.get() );
 135         if (! mapping.is())
 136         {
 137             Reference< lang::XComponent > xComp( xContext, UNO_QUERY );
 138             if (xComp.is())
 139                 xComp->dispose();
 140             throw RuntimeException("cannot get mapping C++ <-> Java!" );
 141         }
 142
 143         jobject jret = static_cast<jobject>(mapping.mapInterface( xContext.get(), cppu::UnoType<decltype(xContext)>::get() ));
 144         jobject jlocal = jni_env->NewLocalRef( jret );
 145         jni_env->DeleteGlobalRef( jret );
 146
 147         return jlocal;
 148     }
 149     catch (const RuntimeException & exc)
 150     {
 151         css::uno::Any exAny( cppu::getCaughtException() );
 152         jclass c = jni_env->FindClass( "com/sun/star/uno/RuntimeException" );
 153         if (nullptr != c)
 154         {
 155             SAL_WARN("javaunohelper", "forwarding RuntimeException: " << exceptionToString(exAny) );
 156             OString cstr( OUStringToOString(
 157                               exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
 158             jni_env->ThrowNew( c, cstr.getStr() );
 159         }
 160     }
 161     catch (const Exception & exc)
 162     {
 163         css::uno::Any ex( cppu::getCaughtException() );
 164         jclass c = jni_env->FindClass( "com/sun/star/uno/Exception" );
 165         if (nullptr != c)
 166         {
 167             SAL_WARN("javaunohelper",  "forwarding Exception: " << exceptionToString(ex) );
 168             OString cstr( OUStringToOString(
 169                               exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
 170             jni_env->ThrowNew( c, cstr.getStr() );
 171         }
 172     }
 173
 174     return nullptr;
 175 }
 176
 177 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */