1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
/* -*- 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 .
 */

#include <sal/config.h>
#include <sal/log.hxx>

#include <atomic>
#include <cassert>
#include <cstddef>
#include <memory>

#include <sal/alloca.h>

#include <com/sun/star/uno/RuntimeException.hpp>

#include <rtl/ustrbuf.hxx>

#include "jni_bridge.h"
#include "jniunoenvironmentdata.hxx"

namespace
{
extern "C"
{


void UNO_proxy_free( uno_ExtEnvironment * env, void * proxy )
    SAL_THROW_EXTERN_C();


void UNO_proxy_acquire( uno_Interface * pUnoI )
    SAL_THROW_EXTERN_C();


void UNO_proxy_release( uno_Interface * pUnoI )
    SAL_THROW_EXTERN_C();


void UNO_proxy_dispatch(
    uno_Interface * pUnoI, typelib_TypeDescription const * member_td,
    void * uno_ret, void * uno_args[], uno_Any ** uno_exc )
    SAL_THROW_EXTERN_C();
}
}

namespace jni_uno
{


void Bridge::handle_java_exc(
    JNI_context const & jni,
    JLocalAutoRef const & jo_exc, uno_Any * uno_exc ) const
{
    assert( jo_exc.is() );
    if (! jo_exc.is())
    {
        throw BridgeRuntimeError(
            "java exception occurred, but no java exception available!?" +
            jni.get_stack_trace() );
    }

    JLocalAutoRef jo_class( jni, jni->GetObjectClass( jo_exc.get() ) );
    JLocalAutoRef jo_class_name(
        jni, jni->CallObjectMethodA(
            jo_class.get(), getJniInfo()->m_method_Class_getName, nullptr ) );
    jni.ensure_no_exception();
    OUString exc_name(
        jstring_to_oustring( jni, static_cast<jstring>(jo_class_name.get()) ) );

    ::com::sun::star::uno::TypeDescription td( exc_name.pData );
    if (!td.is() || (td.get()->eTypeClass != typelib_TypeClass_EXCEPTION))
    {
        // call toString()
        JLocalAutoRef jo_descr(
            jni, jni->CallObjectMethodA(
                jo_exc.get(), getJniInfo()->m_method_Object_toString, nullptr ) );
        jni.ensure_no_exception();
        throw BridgeRuntimeError(
            "non-UNO exception occurred: "
            + jstring_to_oustring( jni, static_cast<jstring>(jo_descr.get()) )
            + jni.get_stack_trace( jo_exc.get() ) );
    }

    std::unique_ptr< rtl_mem > uno_data( rtl_mem::allocate( td.get()->nSize ) );
    jvalue val;
    val.l = jo_exc.get();
    map_to_uno(
        jni, uno_data.get(), val, td.get()->pWeakRef, nullptr,
        false /* no assign */, false /* no out param */ );

#if OSL_DEBUG_LEVEL > 0
    // patch Message, append stack trace
    reinterpret_cast< ::com::sun::star::uno::Exception * >(
        uno_data.get() )->Message += jni.get_stack_trace( jo_exc.get() );
#endif

    typelib_typedescriptionreference_acquire( td.get()->pWeakRef );
    uno_exc->pType = td.get()->pWeakRef;
    uno_exc->pData = uno_data.release();

    SAL_INFO(
        "bridges",
        "exception occurred uno->java: [" << exc_name << "] "
        << (static_cast<css::uno::Exception const *>(uno_exc->pData)
            ->Message));
}


void Bridge::call_java(
    jobject javaI, typelib_InterfaceTypeDescription * iface_td,
    sal_Int32 local_member_index, sal_Int32 function_pos_offset,
    typelib_TypeDescriptionReference * return_type,
    typelib_MethodParameter * params, sal_Int32 nParams,
    void * uno_ret, void * uno_args [], uno_Any ** uno_exc ) const
{
    assert( function_pos_offset == 0 || function_pos_offset == 1 );

    JNI_guarded_context jni(
        getJniInfo(),
        static_cast<JniUnoEnvironmentData *>(m_java_env->pContext)->machine);

    // assure fully initialized iface_td:
    ::com::sun::star::uno::TypeDescription iface_holder;
    if (! iface_td->aBase.bComplete) {
        iface_holder = ::com::sun::star::uno::TypeDescription(
            reinterpret_cast<typelib_TypeDescription *>(iface_td) );
        iface_holder.makeComplete();
        if (! iface_holder.get()->bComplete) {
            throw BridgeRuntimeError(
                "cannot make type complete: "
                + OUString::unacquired(&iface_holder.get()->pTypeName)
                + jni.get_stack_trace() );
        }
        iface_td = reinterpret_cast<typelib_InterfaceTypeDescription *>(
            iface_holder.get() );
        assert( iface_td->aBase.eTypeClass == typelib_TypeClass_INTERFACE );
    }

    // prepare java args, save param td
    jvalue * java_args = static_cast<jvalue *>(alloca( sizeof (jvalue) * nParams ));

    sal_Int32 nPos;
    for ( nPos = 0; nPos < nParams; ++nPos )
    {
        try
        {
            typelib_MethodParameter const & param = params[ nPos ];
            java_args[ nPos ].l = nullptr; // if out: build up array[ 1 ]
            map_to_java(
                jni, &java_args[ nPos ],
                uno_args[ nPos ],
                param.pTypeRef, nullptr,
                param.bIn /* convert uno value */,
                param.bOut /* build up array[ 1 ] */ );
        }
        catch (...)
        {
            // cleanup
            for ( sal_Int32 n = 0; n < nPos; ++n )
            {
                typelib_MethodParameter const & param = params[ n ];
                if (param.bOut ||
                    typelib_TypeClass_DOUBLE < param.pTypeRef->eTypeClass)
                {
                    jni->DeleteLocalRef( java_args[ n ].l );
                }
            }
            throw;
        }
    }

    sal_Int32 base_members = iface_td->nAllMembers - iface_td->nMembers;
    assert( base_members < iface_td->nAllMembers );
    sal_Int32 base_members_function_pos =
        iface_td->pMapMemberIndexToFunctionIndex[ base_members ];
    sal_Int32 member_pos = base_members + local_member_index;
    SAL_WARN_IF(
        member_pos >= iface_td->nAllMembers, "bridges",
        "member pos out of range");
    sal_Int32 function_pos =
        iface_td->pMapMemberIndexToFunctionIndex[ member_pos ]
        + function_pos_offset;
    SAL_WARN_IF(
        (function_pos < base_members_function_pos
         || function_pos >= iface_td->nMapFunctionIndexToMemberIndex),
        "bridges", "illegal function index");
    function_pos -= base_members_function_pos;

    JNI_interface_type_info const * info =
        static_cast< JNI_interface_type_info const * >(
            getJniInfo()->get_type_info( jni, &iface_td->aBase ) );
    jmethodID method_id = info->m_methods[ function_pos ];

#if OSL_DEBUG_LEVEL > 0
    OUStringBuffer trace_buf( 128 );
    trace_buf.append( "calling " );
    JLocalAutoRef jo_method(
        jni, jni->ToReflectedMethod( info->m_class, method_id, JNI_FALSE ) );
    jni.ensure_no_exception();
    JLocalAutoRef jo_descr(
        jni, jni->CallObjectMethodA(
            jo_method.get(), getJniInfo()->m_method_Object_toString, nullptr ) );
    jni.ensure_no_exception();
    trace_buf.append( jstring_to_oustring( jni, static_cast<jstring>(jo_descr.get()) ) );
    trace_buf.append( " on " );
    jo_descr.reset(
        jni->CallObjectMethodA(
            javaI, getJniInfo()->m_method_Object_toString, nullptr ) );
    jni.ensure_no_exception();
    trace_buf.append( jstring_to_oustring( jni, static_cast<jstring>(jo_descr.get()) ) );
    trace_buf.append( " (" );
    JLocalAutoRef jo_class( jni, jni->GetObjectClass( javaI ) );
    jo_descr.reset(
        jni->CallObjectMethodA(
            jo_class.get(), getJniInfo()->m_method_Object_toString, nullptr ) );
    jni.ensure_no_exception();
    trace_buf.append( jstring_to_oustring( jni, static_cast<jstring>(jo_descr.get()) ) );
    trace_buf.append( ")" );
    SAL_INFO("bridges", trace_buf.makeStringAndClear());
#endif

    // complex return value
    JLocalAutoRef java_ret( jni );

    switch (return_type->eTypeClass)
    {
    case typelib_TypeClass_VOID:
        jni->CallVoidMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_CHAR:
        *static_cast<sal_Unicode *>(uno_ret) =
            jni->CallCharMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_BOOLEAN:
        *static_cast<sal_Bool *>(uno_ret) =
            jni->CallBooleanMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_BYTE:
        *static_cast<sal_Int8 *>(uno_ret) =
            jni->CallByteMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_SHORT:
    case typelib_TypeClass_UNSIGNED_SHORT:
        *static_cast<sal_Int16 *>(uno_ret) =
            jni->CallShortMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_LONG:
    case typelib_TypeClass_UNSIGNED_LONG:
        *static_cast<sal_Int32 *>(uno_ret) =
            jni->CallIntMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_HYPER:
    case typelib_TypeClass_UNSIGNED_HYPER:
        *static_cast<sal_Int64 *>(uno_ret) =
            jni->CallLongMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_FLOAT:
        *static_cast<float *>(uno_ret) =
            jni->CallFloatMethodA( javaI, method_id, java_args );
        break;
    case typelib_TypeClass_DOUBLE:
        *static_cast<double *>(uno_ret) =
            jni->CallDoubleMethodA( javaI, method_id, java_args );
        break;
    default:
        java_ret.reset(
            jni->CallObjectMethodA( javaI, method_id, java_args ) );
        break;
    }

    if (jni->ExceptionCheck())
    {
        JLocalAutoRef jo_exc( jni, jni->ExceptionOccurred() );
        jni->ExceptionClear();

        // release temp java local refs
        for ( nPos = 0; nPos < nParams; ++nPos )
        {
            typelib_MethodParameter const & param = params[ nPos ];
            if (param.bOut ||
                typelib_TypeClass_DOUBLE < param.pTypeRef->eTypeClass)
            {
                jni->DeleteLocalRef( java_args[ nPos ].l );
            }
        }

        handle_java_exc( jni, jo_exc, *uno_exc );
    }
    else // no exception
    {
        for ( nPos = 0; nPos < nParams; ++nPos )
        {
            typelib_MethodParameter const & param = params[ nPos ];
            if (param.bOut)
            {
                try
                {
                    map_to_uno(
                        jni, uno_args[ nPos ],
                        java_args[ nPos ], param.pTypeRef, nullptr,
                        param.bIn /* assign if inout */,
                        true /* out param */ );
                }
                catch (...)
                {
                    // cleanup uno pure out
                    for ( sal_Int32 n = 0; n < nPos; ++n )
                    {
                        typelib_MethodParameter const & p = params[ n ];
                        if (! p.bIn)
                        {
                            uno_type_destructData(
                                uno_args[ n ], p.pTypeRef, nullptr );
                        }
                    }
                    // cleanup java temp local refs
                    for ( ; nPos < nParams; ++nPos )
                    {
                        typelib_MethodParameter const & p = params[ nPos ];
                        if (p.bOut ||
                            typelib_TypeClass_DOUBLE <
                              p.pTypeRef->eTypeClass)
                        {
                            jni->DeleteLocalRef( java_args[ nPos ].l );
                        }
                    }
                    throw;
                }
                jni->DeleteLocalRef( java_args[ nPos ].l );
            }
            else // pure temp in param
            {
                if (typelib_TypeClass_DOUBLE < param.pTypeRef->eTypeClass)
                    jni->DeleteLocalRef( java_args[ nPos ].l );
            }
        }

        // return value
        if (typelib_TypeClass_DOUBLE < return_type->eTypeClass)
        {
            try
            {
                jvalue val;
                val.l = java_ret.get();
                map_to_uno(
                    jni, uno_ret, val, return_type, nullptr,
                    false /* no assign */, false /* no out param */ );
            }
            catch (...)
            {
                // cleanup uno pure out
                for ( sal_Int32 i = 0; i < nParams; ++i )
                {
                    typelib_MethodParameter const & param = params[ i ];
                    if (! param.bIn)
                    {
                        uno_type_destructData(
                            uno_args[ i ], param.pTypeRef, nullptr );
                    }
                }
                throw;
            }
        } // else: already set integral uno return value

        // no exception occurred
        *uno_exc = nullptr;
    }
}

// an UNO proxy wrapping a Java interface
struct UNO_proxy : public uno_Interface
{
    mutable std::atomic<std::size_t>    m_ref;
    Bridge const *                      m_bridge;

    // mapping information
    jobject                             m_javaI;
    jstring                             m_jo_oid;
    OUString                            m_oid;
    JNI_interface_type_info const *     m_type_info;

    inline void acquire() const;
    inline void release() const;

    // ctor
    inline UNO_proxy(
        JNI_context const & jni, Bridge const * bridge,
        jobject javaI, jstring jo_oid, OUString const & oid,
        JNI_interface_type_info const * info );
};


inline UNO_proxy::UNO_proxy(
    JNI_context const & jni, Bridge const * bridge,
    jobject javaI, jstring jo_oid, OUString const & oid,
    JNI_interface_type_info const * info )
    : m_ref( 1 ),
      m_oid( oid ),
      m_type_info( info )
{
    JNI_info const * jni_info = bridge->getJniInfo();
    JLocalAutoRef jo_string_array(
        jni, jni->NewObjectArray( 1, jni_info->m_class_String, jo_oid ) );
    jni.ensure_no_exception();
    jvalue args[ 3 ];
    args[ 0 ].l = javaI;
    args[ 1 ].l = jo_string_array.get();
    args[ 2 ].l = info->m_type;
    jobject jo_iface = jni->CallObjectMethodA(
        jni_info->m_object_java_env,
        jni_info->m_method_IEnvironment_registerInterface, args );
    jni.ensure_no_exception();

    m_javaI = jni->NewGlobalRef( jo_iface );
    m_jo_oid = static_cast<jstring>(jni->NewGlobalRef( jo_oid ));
    bridge->acquire();
    m_bridge = bridge;

    // uno_Interface
    uno_Interface::acquire = UNO_proxy_acquire;
    uno_Interface::release = UNO_proxy_release;
    uno_Interface::pDispatcher = UNO_proxy_dispatch;
}


inline void UNO_proxy::acquire() const
{
    if (++m_ref == 1)
    {
        // rebirth of proxy zombie
        void * that = const_cast< UNO_proxy * >( this );
        // register at uno env
        (*m_bridge->m_uno_env->registerProxyInterface)(
            m_bridge->m_uno_env, &that,
            UNO_proxy_free, m_oid.pData,
            reinterpret_cast<typelib_InterfaceTypeDescription *>(m_type_info->m_td.get()) );
        assert( this == that );
    }
}


inline void UNO_proxy::release() const
{
    if (--m_ref == 0)
    {
        // revoke from uno env on last release
        (*m_bridge->m_uno_env->revokeInterface)(
            m_bridge->m_uno_env, const_cast< UNO_proxy * >( this ) );
    }
}


uno_Interface * Bridge::map_to_uno(
    JNI_context const & jni,
    jobject javaI, JNI_interface_type_info const * info ) const
{
    JLocalAutoRef jo_oid( jni, compute_oid( jni, javaI ) );
    OUString oid( jstring_to_oustring( jni, static_cast<jstring>(jo_oid.get()) ) );

    uno_Interface * pUnoI = nullptr;
    (*m_uno_env->getRegisteredInterface)(
        m_uno_env, reinterpret_cast<void **>(&pUnoI),
        oid.pData, reinterpret_cast<typelib_InterfaceTypeDescription *>(info->m_td.get()) );

    if (pUnoI == nullptr) // no existing interface, register new proxy
    {
        // refcount initially 1
        pUnoI = new UNO_proxy(
            jni, this,
            javaI, static_cast<jstring>(jo_oid.get()), oid, info );

        (*m_uno_env->registerProxyInterface)(
            m_uno_env, reinterpret_cast<void **>(&pUnoI),
            UNO_proxy_free,
            oid.pData, reinterpret_cast<typelib_InterfaceTypeDescription *>(info->m_td.get()) );
    }
    return pUnoI;
}

}

using namespace ::jni_uno;

namespace
{
extern "C"
{


void UNO_proxy_free( uno_ExtEnvironment * env, void * proxy )
    SAL_THROW_EXTERN_C()
{
    UNO_proxy * that = static_cast< UNO_proxy * >( proxy );
    Bridge const * bridge = that->m_bridge;

    assert(env == bridge->m_uno_env); (void) env;
    SAL_INFO("bridges", "freeing binary uno proxy: " << that->m_oid);

    try
    {
        JNI_guarded_context jni(
            bridge->getJniInfo(),
            (static_cast<JniUnoEnvironmentData *>(bridge->m_java_env->pContext)
             ->machine));

        jni->DeleteGlobalRef( that->m_javaI );
        jni->DeleteGlobalRef( that->m_jo_oid );
    }
    catch (BridgeRuntimeError & err)
    {
        SAL_WARN(
            "bridges",
            "ignoring BridgeRuntimeError \"" << err.m_message << "\"");
    }
    catch (::jvmaccess::VirtualMachine::AttachGuard::CreationException &)
    {
        SAL_WARN("bridges", "attaching current thread to java failed");
    }

    bridge->release();
#if OSL_DEBUG_LEVEL > 0
    *reinterpret_cast<int *>(that) = 0xdeadcafe;
#endif
    delete that;
}


void UNO_proxy_acquire( uno_Interface * pUnoI )
    SAL_THROW_EXTERN_C()
{
    UNO_proxy const * that = static_cast< UNO_proxy const * >( pUnoI );
    that->acquire();
}


void UNO_proxy_release( uno_Interface * pUnoI )
    SAL_THROW_EXTERN_C()
{
    UNO_proxy const * that = static_cast< UNO_proxy const * >( pUnoI );
    that->release();
}


void UNO_proxy_dispatch(
    uno_Interface * pUnoI, typelib_TypeDescription const * member_td,
    void * uno_ret, void * uno_args [], uno_Any ** uno_exc )
    SAL_THROW_EXTERN_C()
{
    UNO_proxy const * that = static_cast< UNO_proxy const * >( pUnoI );
    Bridge const * bridge = that->m_bridge;

    SAL_INFO(
        "bridges",
        "uno->java call: " << OUString::unacquired(&member_td->pTypeName)
            << " on oid " << that->m_oid);

    try
    {
        switch (member_td->eTypeClass)
        {
        case typelib_TypeClass_INTERFACE_ATTRIBUTE:
        {
            typelib_InterfaceAttributeTypeDescription const * attrib_td =
                reinterpret_cast<
                typelib_InterfaceAttributeTypeDescription const * >(
                    member_td );
            com::sun::star::uno::TypeDescription attrib_holder;
            while ( attrib_td->pBaseRef != nullptr ) {
                attrib_holder = com::sun::star::uno::TypeDescription(
                    attrib_td->pBaseRef );
                assert(
                    attrib_holder.get()->eTypeClass
                    == typelib_TypeClass_INTERFACE_ATTRIBUTE );
                attrib_td = reinterpret_cast<
                    typelib_InterfaceAttributeTypeDescription * >(
                        attrib_holder.get() );
            }
            typelib_InterfaceTypeDescription * iface_td = attrib_td->pInterface;

            if (uno_ret == nullptr) // is setter method
            {
                typelib_MethodParameter param;
                param.pTypeRef = attrib_td->pAttributeTypeRef;
                param.bIn = true;
                param.bOut = false;

                bridge->call_java(
                    that->m_javaI, iface_td,
                    attrib_td->nIndex, 1, // get, then set method
                    bridge->getJniInfo()->m_void_type.getTypeLibType(),
                    &param, 1,
                    nullptr, uno_args, uno_exc );
            }
            else // is getter method
            {
                bridge->call_java(
                    that->m_javaI, iface_td, attrib_td->nIndex, 0,
                    attrib_td->pAttributeTypeRef,
                    nullptr, 0, // no params
                    uno_ret, nullptr, uno_exc );
            }
            break;
        }
        case typelib_TypeClass_INTERFACE_METHOD:
        {
            typelib_InterfaceMethodTypeDescription const * method_td =
                reinterpret_cast<
                typelib_InterfaceMethodTypeDescription const * >(
                    member_td );
            com::sun::star::uno::TypeDescription method_holder;
            while ( method_td->pBaseRef != nullptr ) {
                method_holder = com::sun::star::uno::TypeDescription(
                    method_td->pBaseRef );
                assert(
                    method_holder.get()->eTypeClass
                    == typelib_TypeClass_INTERFACE_METHOD );
                method_td = reinterpret_cast<
                    typelib_InterfaceMethodTypeDescription * >(
                        method_holder.get() );
            }
            typelib_InterfaceTypeDescription * iface_td = method_td->pInterface;

            switch ( method_td->aBase.nPosition )
            {
            case 0: // queryInterface()
            {
                TypeDescr demanded_td(
                    *static_cast< typelib_TypeDescriptionReference ** >(
                        uno_args[ 0 ] ) );
                if (demanded_td.get()->eTypeClass !=
                      typelib_TypeClass_INTERFACE)
                {
                    throw BridgeRuntimeError(
                        "queryInterface() call demands an INTERFACE type!" );
                }

                uno_Interface * pInterface = nullptr;
                (*bridge->m_uno_env->getRegisteredInterface)(
                    bridge->m_uno_env,
                    reinterpret_cast<void **>(&pInterface), that->m_oid.pData,
                    reinterpret_cast<typelib_InterfaceTypeDescription *>(demanded_td.get()) );

                if (pInterface == nullptr)
                {
                    JNI_info const * jni_info = bridge->getJniInfo();
                    JNI_guarded_context jni(
                        jni_info,
                        (static_cast<JniUnoEnvironmentData *>(
                            bridge->m_java_env->pContext)
                         ->machine));

                    JNI_interface_type_info const * info =
                        static_cast< JNI_interface_type_info const * >(
                            jni_info->get_type_info( jni, demanded_td.get() ) );

                    jvalue args[ 2 ];
                    args[ 0 ].l = info->m_type;
                    args[ 1 ].l = that->m_javaI;

                    JLocalAutoRef jo_ret(
                        jni, jni->CallStaticObjectMethodA(
                            jni_info->m_class_UnoRuntime,
                            jni_info->m_method_UnoRuntime_queryInterface,
                            args ) );

                    if (jni->ExceptionCheck())
                    {
                        JLocalAutoRef jo_exc( jni, jni->ExceptionOccurred() );
                        jni->ExceptionClear();
                        bridge->handle_java_exc( jni, jo_exc, *uno_exc );
                    }
                    else
                    {
                        if (jo_ret.is())
                        {
                            SAL_WARN_IF(
                                (jstring_to_oustring(
                                    jni,
                                    static_cast<jstring>(
                                        JLocalAutoRef(
                                            jni, compute_oid(jni, jo_ret.get()))
                                        .get()))
                                 != that->m_oid),
                                "bridges", "different oids");
                            // refcount initially 1
                            uno_Interface * pUnoI2 = new UNO_proxy(
                                jni, bridge, jo_ret.get(),
                                that->m_jo_oid, that->m_oid, info );

                            (*bridge->m_uno_env->registerProxyInterface)(
                                bridge->m_uno_env,
                                reinterpret_cast<void **>(&pUnoI2),
                                UNO_proxy_free, that->m_oid.pData,
                                reinterpret_cast<
                                  typelib_InterfaceTypeDescription * >(
                                      info->m_td.get() ) );

                            uno_any_construct(
                                static_cast<uno_Any *>(uno_ret), &pUnoI2,
                                demanded_td.get(), nullptr );
                            (*pUnoI2->release)( pUnoI2 );
                        }
                        else // object does not support demanded interface
                        {
                            uno_any_construct(
                                static_cast< uno_Any * >( uno_ret ),
                                nullptr, nullptr, nullptr );
                        }
                        // no exception occurred
                        *uno_exc = nullptr;
                    }
                }
                else
                {
                    uno_any_construct(
                        static_cast< uno_Any * >( uno_ret ),
                        &pInterface, demanded_td.get(), nullptr );
                    (*pInterface->release)( pInterface );
                    *uno_exc = nullptr;
                }
                break;
            }
            case 1: // acquire this proxy
                that->acquire();
                *uno_exc = nullptr;
                break;
            case 2: // release this proxy
                that->release();
                *uno_exc = nullptr;
                break;
            default: // arbitrary method call
                bridge->call_java(
                    that->m_javaI, iface_td, method_td->nIndex, 0,
                    method_td->pReturnTypeRef,
                    method_td->pParams, method_td->nParams,
                    uno_ret, uno_args, uno_exc );
                break;
            }
            break;
        }
        default:
        {
            throw BridgeRuntimeError(
                "illegal member type description!" );
        }
        }
    }
    catch (BridgeRuntimeError & err)
    {
        OUStringBuffer buf( 128 );
        buf.append( "[jni_uno bridge error] UNO calling Java method " );
        if (member_td->eTypeClass == typelib_TypeClass_INTERFACE_METHOD ||
            member_td->eTypeClass == typelib_TypeClass_INTERFACE_ATTRIBUTE)
        {
            buf.append( OUString::unacquired(
                            &reinterpret_cast<
                            typelib_InterfaceMemberTypeDescription const * >(
                                member_td )->pMemberName ) );
        }
        buf.append( ": " );
        buf.append( err.m_message );
        // binary identical struct
        ::com::sun::star::uno::RuntimeException exc(
            buf.makeStringAndClear(),
            ::com::sun::star::uno::Reference<
              ::com::sun::star::uno::XInterface >() );
        ::com::sun::star::uno::Type const & exc_type = cppu::UnoType<decltype(exc)>::get();
        uno_type_any_construct( *uno_exc, &exc, exc_type.getTypeLibType(), nullptr );
        SAL_INFO("bridges", exc.Message);
    }
    catch (::jvmaccess::VirtualMachine::AttachGuard::CreationException &)
    {
        // binary identical struct
        ::com::sun::star::uno::RuntimeException exc(
            "[jni_uno bridge error] attaching current thread to java failed!",
            ::com::sun::star::uno::Reference<
              ::com::sun::star::uno::XInterface >() );
        ::com::sun::star::uno::Type const & exc_type = cppu::UnoType<decltype(exc)>::get();
        uno_type_any_construct( *uno_exc, &exc, exc_type.getTypeLibType(), nullptr );
        SAL_WARN("bridges", exc.Message);
    }
}

}
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */