/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_javaunohelper.hxx"

#include "osl/diagnose.h"

#include "rtl/alloc.h"
#include "rtl/bootstrap.hxx"
#include "rtl/string.hxx"

#include "uno/mapping.hxx"
#include "uno/environment.hxx"

#include "cppuhelper/bootstrap.hxx"

#include "com/sun/star/lang/XComponent.hpp"
#include "com/sun/star/lang/XSingleComponentFactory.hpp"

#include "jni.h"
#include "jvmaccess/virtualmachine.hxx"
#include "jvmaccess/unovirtualmachine.hxx"

#include "vm.hxx"

#define OUSTR(x) ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(x) )


using namespace ::com::sun::star;
using namespace ::com::sun::star::uno;
using ::rtl::OString;
using ::rtl::OUString;

namespace javaunohelper
{

inline ::rtl::OUString jstring_to_oustring( jstring jstr, JNIEnv * jni_env )
{
    OSL_ASSERT( sizeof (sal_Unicode) == sizeof (jchar) );
    jsize len = jni_env->GetStringLength( jstr );
    rtl_uString * ustr =
        (rtl_uString *)rtl_allocateMemory( sizeof (rtl_uString) + (len * sizeof (sal_Unicode)) );
    jni_env->GetStringRegion( jstr, 0, len, ustr->buffer );
    OSL_ASSERT( JNI_FALSE == jni_env->ExceptionCheck() );
    ustr->refCount = 1;
    ustr->length = len;
    ustr->buffer[ len ] = '\0';
    return ::rtl::OUString( ustr, SAL_NO_ACQUIRE );
}

}

//==================================================================================================
extern "C" JNIEXPORT jobject JNICALL Java_com_sun_star_comp_helper_Bootstrap_cppuhelper_1bootstrap(
    JNIEnv * jni_env, jclass, jstring juno_rc, jobjectArray jpairs,
    jobject loader )
{
    try
    {
        if (0 != jpairs)
        {
            jsize nPos = 0, len = jni_env->GetArrayLength( jpairs );
            while (nPos < len)
            {
                // name
                jstring jstr = (jstring)jni_env->GetObjectArrayElement( jpairs, nPos );
                if (JNI_FALSE != jni_env->ExceptionCheck())
                {
                    jni_env->ExceptionClear();
                    throw RuntimeException(
                        OUSTR("index out of bounds?!"), Reference< XInterface >() );
                }
                if (0 != jstr)
                {
                    OUString name( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
                    // value
                    jstr = (jstring)jni_env->GetObjectArrayElement( jpairs, nPos +1 );
                    if (JNI_FALSE != jni_env->ExceptionCheck())
                    {
                        jni_env->ExceptionClear();
                        throw RuntimeException(
                            OUSTR("index out of bounds?!"), Reference< XInterface >() );
                    }
                    if (0 != jstr)
                    {
                        OUString value( ::javaunohelper::jstring_to_oustring( jstr, jni_env ) );
                        
                        // set bootstrap parameter
                        ::rtl::Bootstrap::set( name, value );
                    }
                }
                nPos += 2;
            }
        }
        
        // bootstrap uno
        Reference< XComponentContext > xContext;
        if (0 == juno_rc)
        {
            xContext = ::cppu::defaultBootstrap_InitialComponentContext();
        }
        else
        {
            OUString uno_rc( ::javaunohelper::jstring_to_oustring( juno_rc, jni_env ) );
            xContext = ::cppu::defaultBootstrap_InitialComponentContext( uno_rc );
        }
        
        // create vm access
        ::rtl::Reference< ::jvmaccess::UnoVirtualMachine > vm_access(
            ::javaunohelper::create_vm_access( jni_env, loader ) );
        // wrap vm singleton entry
        xContext = ::javaunohelper::install_vm_singleton( xContext, vm_access );
        
        // get uno envs
	    OUString cpp_env_name = OUSTR(CPPU_CURRENT_LANGUAGE_BINDING_NAME);
        OUString java_env_name = OUSTR(UNO_LB_JAVA);
        Environment java_env, cpp_env;
	    uno_getEnvironment((uno_Environment **)&cpp_env, cpp_env_name.pData, NULL);
        uno_getEnvironment( (uno_Environment **)&java_env, java_env_name.pData, vm_access.get() );
        
        // map to java
        Mapping mapping( cpp_env.get(), java_env.get() );
        if (! mapping.is())
        {
            Reference< lang::XComponent > xComp( xContext, UNO_QUERY );
            if (xComp.is())
                xComp->dispose();
            throw RuntimeException(
                OUSTR("cannot get mapping C++ <-> Java!"),
                Reference< XInterface >() );
        }
        
        jobject jret = (jobject)mapping.mapInterface( xContext.get(), ::getCppuType( &xContext ) );
        jobject jlocal = jni_env->NewLocalRef( jret );
        jni_env->DeleteGlobalRef( jret );
        
        return jlocal;
    }
    catch (RuntimeException & exc)
    {
        jclass c = jni_env->FindClass( "com/sun/star/uno/RuntimeException" );
        if (0 != c)
        {
            OString cstr( ::rtl::OUStringToOString(
                              exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
            OSL_TRACE( __FILE__": forwarding RuntimeException: %s", cstr.getStr() );
            jni_env->ThrowNew( c, cstr.getStr() );
        }
    }
    catch (Exception & exc)
    {
        jclass c = jni_env->FindClass( "com/sun/star/uno/Exception" );
        if (0 != c)
        {
            OString cstr( ::rtl::OUStringToOString(
                              exc.Message, RTL_TEXTENCODING_JAVA_UTF8 ) );
            OSL_TRACE( __FILE__": forwarding Exception: %s", cstr.getStr() );
            jni_env->ThrowNew( c, cstr.getStr() );
        }
    }
    
    return 0;
}