summaryrefslogtreecommitdiff
path: root/filter/source/config/cache/typedetection.cxx
blob: 16f204d95babe7db227ff5b8aeab18132345946e (plain)
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
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
/* -*- 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 "typedetection.hxx"
#include "constant.hxx"

#include <com/sun/star/document/XExtendedFilterDetection.hpp>
#include <com/sun/star/util/URLTransformer.hpp>
#include <com/sun/star/util/XURLTransformer.hpp>

#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/task/XInteractionHandler.hpp>
#include <tools/wldcrd.hxx>
#include <rtl/ustrbuf.hxx>
#include <framework/interaction.hxx>
#include <tools/urlobj.hxx>
#include <comphelper/fileurl.hxx>
#include <comphelper/processfactory.hxx>
#include <comphelper/sequence.hxx>

#define DEBUG_TYPE_DETECTION 0

#if DEBUG_TYPE_DETECTION
#include <iostream>
using std::cout;
using std::endl;
#endif

using namespace com::sun::star;

namespace filter{
    namespace config{

TypeDetection::TypeDetection(const css::uno::Reference< css::uno::XComponentContext >& rxContext)
   : m_xContext(rxContext)
{
    BaseContainer::init(rxContext                                     ,
                        TypeDetection::impl_getImplementationName()   ,
                        TypeDetection::impl_getSupportedServiceNames(),
                        FilterCache::E_TYPE                           );
}



TypeDetection::~TypeDetection()
{
}



OUString SAL_CALL TypeDetection::queryTypeByURL(const OUString& sURL)
    throw (css::uno::RuntimeException, std::exception)
{
    OUString sType;

    // SAFE ->
    ::osl::ResettableMutexGuard aLock(m_aLock);

    css::util::URL  aURL;
    aURL.Complete = sURL;
    css::uno::Reference< css::util::XURLTransformer > xParser( css::util::URLTransformer::create(m_xContext) );
    xParser->parseStrict(aURL);

    // set std types as minimum requirement first!
    // Only in case no type was found for given URL,
    // use optional types too ...
    FlatDetection lFlatTypes;
    m_rCache->detectFlatForURL(aURL, lFlatTypes);

    if (
        (lFlatTypes.size() < 1                                ) &&
        (!m_rCache->isFillState(FilterCache::E_CONTAINS_TYPES))
       )
    {
        m_rCache->load(FilterCache::E_CONTAINS_TYPES);
        m_rCache->detectFlatForURL(aURL, lFlatTypes);
    }

    // first item is guaranteed as "preferred" one!
    if (lFlatTypes.size() > 0)
    {
        const FlatDetectionInfo& aMatch = *(lFlatTypes.begin());
        sType = aMatch.sType;
    }

    return sType;
    // <- SAFE
}

namespace {

/**
 * Rank format types in order of complexity.  More complex formats are
 * ranked higher so that they get tested sooner over simpler formats.
 *
 * Guidelines to determine how complex a format is (subject to change):
 *
 * 1) compressed text (XML, HTML, etc)
 * 2) binary
 * 3) non-compressed text
 *   3.1) structured text
 *     3.1.1) dialect of a structured text (e.g. docbook XML)
 *     3.1.2) generic structured text (e.g. generic XML)
 *   3.2) non-structured text
 *
 * In each category, rank them from strictly-structured to
 * loosely-structured.
 */
int getFlatTypeRank(const OUString& rType)
{
    // List formats from more complex to less complex.
    // TODO: Add more.
    static const char* ranks[] = {

        // Compressed XML (ODF XML zip formats)
        "writer8_template",
        "writer8",
        "calc8_template",
        "calc8",
        "impress8_template",
        "impress8",
        "draw8_template",
        "draw8",
        "chart8",
        "math8",
        "writerglobal8_template",
        "writerglobal8",
        "writerweb8_writer_template",
        "StarBase",

        // Compressed XML (OOXML)
        "writer_OOXML_Text_Template",
        "writer_OOXML",
        "writer_MS_Word_2007_Template",
        "writer_MS_Word_2007",
        "Office Open XML Spreadsheet Template",
        "Office Open XML Spreadsheet",
        "MS Excel 2007 XML Template",
        "MS Excel 2007 XML",
        "MS PowerPoint 2007 XML Template",
        "MS PowerPoint 2007 XML AutoPlay",
        "MS PowerPoint 2007 XML",

        // Compressed XML (Uniform/Unified Office Format)
        "Unified_Office_Format_text",
        "Unified_Office_Format_spreadsheet",
        "Unified_Office_Format_presentation",

        // Compressed XML (StarOffice XML zip formats)
        "calc_StarOffice_XML_Calc",
        "calc_StarOffice_XML_Calc_Template",
        "chart_StarOffice_XML_Chart",
        "draw_StarOffice_XML_Draw",
        "draw_StarOffice_XML_Draw_Template",
        "impress_StarOffice_XML_Impress",
        "impress_StarOffice_XML_Impress_Template",
        "math_StarOffice_XML_Math",
        "writer_StarOffice_XML_Writer",
        "writer_StarOffice_XML_Writer_Template",
        "writer_globaldocument_StarOffice_XML_Writer_GlobalDocument",
        "writer_web_StarOffice_XML_Writer_Web_Template",

        // Compressed text
        "pdf_Portable_Document_Format",

        // Binary
        "writer_T602_Document",
        "writer_WordPerfect_Document",
        "writer_MS_Works_Document",
        "writer_MS_Word_97_Vorlage",
        "writer_MS_Word_97",
        "writer_MS_Word_95_Vorlage",
        "writer_MS_Word_95",
        "writer_MS_WinWord_60",
        "writer_MS_WinWord_5",
        "MS Excel 2007 Binary",
        "calc_MS_Excel_97_VorlageTemplate",
        "calc_MS_Excel_97",
        "calc_MS_Excel_95_VorlageTemplate",
        "calc_MS_Excel_95",
        "calc_MS_Excel_5095_VorlageTemplate",
        "calc_MS_Excel_5095",
        "calc_MS_Excel_40_VorlageTemplate",
        "calc_MS_Excel_40",
        "calc_Pocket_Excel_File",
        "impress_MS_PowerPoint_97_Vorlage",
        "impress_MS_PowerPoint_97_AutoPlay",
        "impress_MS_PowerPoint_97",
        "calc_Lotus",
        "calc_QPro",
        "calc_SYLK",
        "calc_DIF",
        "calc_dBase",

        // Binary (raster and vector image files)
        "emf_MS_Windows_Metafile",
        "wmf_MS_Windows_Metafile",
        "met_OS2_Metafile",
        "svm_StarView_Metafile",
        "sgv_StarDraw_20",
        "tif_Tag_Image_File",
        "tga_Truevision_TARGA",
        "sgf_StarOffice_Writer_SGF",
        "ras_Sun_Rasterfile",
        "psd_Adobe_Photoshop",
        "png_Portable_Network_Graphic",
        "jpg_JPEG",
        "mov_MOV",
        "gif_Graphics_Interchange",
        "bmp_MS_Windows",
        "pcx_Zsoft_Paintbrush",
        "pct_Mac_Pict",
        "pcd_Photo_CD_Base",
        "pcd_Photo_CD_Base4",
        "pcd_Photo_CD_Base16",
        "impress_CGM_Computer_Graphics_Metafile", // There is binary and ascii variants ?
        "draw_WordPerfect_Graphics",
        "draw_Visio_Document",
        "draw_Publisher_Document",
        "draw_Corel_Presentation_Exchange",
        "draw_CorelDraw_Document",
        "writer_LotusWordPro_Document",
        "writer_MIZI_Hwp_97", // Hanword (Hancom Office)

        // Non-compressed XML
        "writer_ODT_FlatXML",
        "calc_ODS_FlatXML",
        "impress_ODP_FlatXML",
        "draw_ODG_FlatXML",
        "calc_MS_Excel_2003_XML",
        "writer_MS_Word_2003_XML",
        "writer_DocBook_File",
        "XHTML_File",
        "svg_Scalable_Vector_Graphics",
        "math_MathML_XML_Math",

        // Non-compressed text
        "dxf_AutoCAD_Interchange",
        "eps_Encapsulated_PostScript",
        "pbm_Portable_Bitmap",   // There is 'raw' and 'ascii' variants.
        "ppm_Portable_Pixelmap", // There is 'raw' and 'ascii' variants.
        "pgm_Portable_Graymap",  // There is 'raw' and 'ascii' variants.
        "xpm_XPM",
        "xbm_X_Consortium",
        "writer_Rich_Text_Format",
        "writer_web_HTML_help",
        "generic_HTML",

        "generic_Text", // Plain text (catch all)

        // Anything ranked lower than generic_Text will never be used during
        // type detection (since generic_Text catches all).

        // Export only
        "writer_layout_dump_xml",
        "pwp_PlaceWare",
        "graphic_SWF",
        "graphic_HTML",

        // Internal use only
        "StarBaseReportChart",
        "StarBaseReport",
        "math_MathType_3x", // MathType equation embedded in Word doc.
    };

    size_t n = SAL_N_ELEMENTS(ranks);

    for (size_t i = 0; i < n; ++i)
    {
        if (rType.equalsAscii(ranks[i]))
            return n - i - 1;
    }

    // Not ranked.  Treat them equally.  Unranked formats have higher priority
    // than the ranked internal ones since they may be defined externally.
    return n;
}

/**
 * Types with matching pattern first, then extension, then custom ranks by
 * types, then types that are supported by the document service come next.
 * Lastly, sort them alphabetically.
 */
struct SortByPriority : public std::binary_function<FlatDetectionInfo, FlatDetectionInfo, bool>
{
    bool operator() (const FlatDetectionInfo& r1, const FlatDetectionInfo& r2) const
    {
        if (r1.bMatchByPattern != r2.bMatchByPattern)
            return r1.bMatchByPattern;

        if (r1.bMatchByExtension != r2.bMatchByExtension)
            return r1.bMatchByExtension;

        int rank1 = getFlatTypeRank(r1.sType);
        int rank2 = getFlatTypeRank(r2.sType);

        if (rank1 != rank2)
            return rank1 > rank2;

        if (r1.bPreselectedByDocumentService != r2.bPreselectedByDocumentService)
            return r1.bPreselectedByDocumentService;

        // All things being equal, sort them alphabetically.
        return r1.sType > r2.sType;
    }
};

struct SortByType : public std::binary_function<FlatDetectionInfo, FlatDetectionInfo, bool>

{
    bool operator() (const FlatDetectionInfo& r1, const FlatDetectionInfo& r2) const
    {
        return r1.sType > r2.sType;
    }
};

struct EqualByType : public std::binary_function<FlatDetectionInfo, FlatDetectionInfo, bool>
{
    bool operator() (const FlatDetectionInfo& r1, const FlatDetectionInfo& r2) const
    {
        return r1.sType == r2.sType;
    }
};

class FindByType : std::unary_function<FlatDetectionInfo, bool>
{
    OUString maType;
public:
    FindByType(const OUString& rType) : maType(rType) {}
    bool operator() (const FlatDetectionInfo& rInfo) const
    {
        return rInfo.sType == maType;
    }
};

#if DEBUG_TYPE_DETECTION
void printFlatDetectionList(const char* caption, const FlatDetection& types)
{
    cout << "-- " << caption << " (size=" << types.size() << ")" << endl;
    FlatDetection::const_iterator it = types.begin(), itEnd = types.end();
    for (; it != itEnd; ++it)
    {
        const FlatDetectionInfo& item = *it;
        cout << "  type='" << item.sType << "'; match by extension (" << item.bMatchByExtension
            << "); match by pattern (" << item.bMatchByPattern << "); pre-selected by doc service ("
            << item.bPreselectedByDocumentService << ")" << endl;
    }
    cout << "--" << endl;
}
#endif

}

OUString SAL_CALL TypeDetection::queryTypeByDescriptor(css::uno::Sequence< css::beans::PropertyValue >& lDescriptor,
                                                              sal_Bool                                         bAllowDeep )
    throw (css::uno::RuntimeException, std::exception)
{
    // make the descriptor more useable :-)
    utl::MediaDescriptor stlDescriptor(lDescriptor);
    OUString sType, sURL;

    try
    {
        // SAFE -> ----------------------------------
        ::osl::ResettableMutexGuard aLock(m_aLock);

        // parse given URL to split it into e.g. main and jump marks ...
        sURL = stlDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_URL(), OUString());

#if OSL_DEBUG_LEVEL > 0
        if (stlDescriptor.find( "FileName" ) != stlDescriptor.end())
            OSL_FAIL("Detect using of deprecated and already unsupported MediaDescriptor property \"FileName\"!");
#endif

        css::util::URL  aURL;
        aURL.Complete = sURL;
        css::uno::Reference< css::util::XURLTransformer > xParser(css::util::URLTransformer::create(m_xContext));
        xParser->parseStrict(aURL);

        OUString aSelectedFilter = stlDescriptor.getUnpackedValueOrDefault(
            utl::MediaDescriptor::PROP_FILTERNAME(), OUString());
        if (!aSelectedFilter.isEmpty())
        {
            // Caller specified the filter type.  Honor it.  Just get the default
            // type for that filter, and bail out.
            if (impl_validateAndSetFilterOnDescriptor(stlDescriptor, aSelectedFilter))
                return stlDescriptor[utl::MediaDescriptor::PROP_TYPENAME()].get<OUString>();
        }

        FlatDetection lFlatTypes;
        impl_getAllFormatTypes(aURL, stlDescriptor, lFlatTypes);

        aLock.clear();
        // <- SAFE ----------------------------------

        // Properly prioritize all candidate types.
        lFlatTypes.sort(SortByPriority());
        lFlatTypes.unique(EqualByType());

        OUString sLastChance;

        // verify every flat detected (or preselected!) type
        // by calling its registered deep detection service.
        // But break this loop if a type match to the given descriptor
        // by an URL pattern(!) or if deep detection isn't allowed from
        // outside (bAllowDeep=sal_False) or break the whole detection by
        // throwing an exception if creation of the might needed input
        // stream failed by e.g. an IO exception ...
        OUStringList lUsedDetectors;
        if (lFlatTypes.size()>0)
            sType = impl_detectTypeFlatAndDeep(stlDescriptor, lFlatTypes, bAllowDeep, lUsedDetectors, sLastChance);


        // flat detection failed
        // pure deep detection failed
        // => ask might existing InteractionHandler
        // means: ask user for it's decision
        if (sType.isEmpty())
            sType = impl_askUserForTypeAndFilterIfAllowed(stlDescriptor);


        // no real detected type - but a might valid one.
        // update descriptor and set last chance for return.
        if (sType.isEmpty() && !sLastChance.isEmpty())
        {
            OSL_FAIL("set first flat detected type without a registered deep detection service as \"last chance\" ... nevertheless some other deep detections said \"NO\". I TRY IT!");
            sType = sLastChance;
        }
    }
    catch(const css::uno::RuntimeException&)
    {
        throw;
    }
    catch(const css::uno::Exception& e)
    {
        SAL_WARN(
            "filter.config",
            "caught Exception \"" << e.Message
                << "\" while querying type of <" << sURL << ">");
        sType.clear();
    }

    // adapt media descriptor, so it contains the right values
    // for type/filter name/document service/ etcpp.
    impl_checkResultsAndAddBestFilter(stlDescriptor, sType); // Attention: sType is used as IN/OUT param here and will might be changed inside this method !!!
    impl_validateAndSetTypeOnDescriptor(stlDescriptor, sType);

    stlDescriptor >> lDescriptor;
    return sType;
}



void TypeDetection::impl_checkResultsAndAddBestFilter(utl::MediaDescriptor& rDescriptor,
                                                      OUString&               sType      )
{
    // a)
    // Dont overwrite a might preselected filter!
    OUString sFilter = rDescriptor.getUnpackedValueOrDefault(
                                utl::MediaDescriptor::PROP_FILTERNAME(),
                                OUString());
    if (!sFilter.isEmpty())
        return;

    // b)
    // check a preselected document service too.
    // Then we have to search a suitable filter within this module.
    OUString sDocumentService = rDescriptor.getUnpackedValueOrDefault(
                                            utl::MediaDescriptor::PROP_DOCUMENTSERVICE(),
                                            OUString());
    if (!sDocumentService.isEmpty())
    {
        try
        {
            OUString sRealType = sType;

            // SAFE ->
            ::osl::ResettableMutexGuard aLock(m_aLock);

            // Attention: For executing next lines of code, We must be sure that
            // all filters already loaded :-(
            // That can disturb our "load on demand feature". But we have no other chance!
            m_rCache->load(FilterCache::E_CONTAINS_FILTERS);

            CacheItem lIProps;
            lIProps[PROPNAME_DOCUMENTSERVICE] <<= sDocumentService;
            lIProps[PROPNAME_TYPE           ] <<= sRealType;
            OUStringList lFilters = m_rCache->getMatchingItemsByProps(FilterCache::E_FILTER, lIProps);

            aLock.clear();
            // <- SAFE

            for (OUStringList::const_iterator pIt  = lFilters.begin();
                  pIt != lFilters.end(); ++pIt)
            {
                // SAFE ->
                aLock.reset();
                try
                {
                    CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, *pIt);
                    sal_Int32 nFlags  = 0;
                    aFilter[PROPNAME_FLAGS] >>= nFlags;

                    if (static_cast<SfxFilterFlags>(nFlags) & SfxFilterFlags::IMPORT)
                        sFilter = *pIt;
                    if (static_cast<SfxFilterFlags>(nFlags) & SfxFilterFlags::PREFERED)
                        break;
                }
                catch(const css::uno::Exception&) {}
                aLock.clear();
                // <- SAFE
            }

            if (!sFilter.isEmpty())
            {
                rDescriptor[utl::MediaDescriptor::PROP_TYPENAME()  ] <<= sRealType;
                rDescriptor[utl::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
                sType = sRealType;
                return;
            }
        }
        catch(const css::uno::Exception&)
            {}
    }

    // c)
    // We can use the preferred filter for the specified type.
    // Such preferred filter points:
    // - to the default filter of the preferred application
    // - or to any other filter if no preferred filter was set.
    // Note: It's an optimization only!
    // It's not guaranteed, that such preferred filter exists.
    sFilter.clear();
    try
    {
        // SAFE ->
        ::osl::ResettableMutexGuard aLock(m_aLock);

        CacheItem aType = m_rCache->getItem(FilterCache::E_TYPE, sType);
        aType[PROPNAME_PREFERREDFILTER] >>= sFilter;
        CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);

        aLock.clear();
        // <- SAFE

        // no exception => found valid type and filter => set it on the given descriptor
        rDescriptor[utl::MediaDescriptor::PROP_TYPENAME()  ] <<= sType  ;
        rDescriptor[utl::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
        return;
    }
    catch(const css::uno::Exception&)
        {}

    // d)
    // Search for any import(!) filter, which is registered for this type.
    sFilter.clear();
    try
    {
        // SAFE ->
        ::osl::ResettableMutexGuard aLock(m_aLock);

        // Attention: For executing next lines of code, We must be sure that
        // all filters already loaded :-(
        // That can disturb our "load on demand feature". But we have no other chance!
        m_rCache->load(FilterCache::E_CONTAINS_FILTERS);

        CacheItem lIProps;
        lIProps[PROPNAME_TYPE] <<= sType;
        OUStringList lFilters = m_rCache->getMatchingItemsByProps(FilterCache::E_FILTER, lIProps);

        aLock.clear();
        // <- SAFE

        OUStringList::const_iterator pIt;
        for (  pIt  = lFilters.begin();
               pIt != lFilters.end()  ;
             ++pIt                    )
        {
            sFilter = *pIt;

            // SAFE ->
            aLock.reset();
            try
            {
                CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);
                sal_Int32 nFlags  = 0;
                aFilter[PROPNAME_FLAGS] >>= nFlags;

                if (static_cast<SfxFilterFlags>(nFlags) & SfxFilterFlags::IMPORT)
                    break;
            }
            catch(const css::uno::Exception&)
                { continue; }
            aLock.clear();
            // <- SAFE

            sFilter.clear();
        }

        if (!sFilter.isEmpty())
        {
            rDescriptor[utl::MediaDescriptor::PROP_TYPENAME()  ] <<= sType  ;
            rDescriptor[utl::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
            return;
        }
    }
    catch(const css::uno::Exception&)
        {}
}



bool TypeDetection::impl_getPreselectionForType(
    const OUString& sPreSelType, const util::URL& aParsedURL, FlatDetection& rFlatTypes, bool bDocService)
{
    // Can be used to suppress execution of some parts of this method
    // if its already clear that detected type is valid or not.
    // Its necessary to use shared code at the end, which update
    // all return parameters constistency!
    bool bBreakDetection = false;

    // Further we must know if it matches by pattern
    // Every flat detected type by pattern wont be detected deep!
    bool bMatchByPattern = false;

    // And we must know if a preselection must be preferred, because
    // it matches by it's extension too.
    bool bMatchByExtension = false;

    // validate type
    OUString sType(sPreSelType);
    CacheItem       aType;
    try
    {
        // SAFE -> --------------------------
        ::osl::ResettableMutexGuard aLock(m_aLock);
        aType = m_rCache->getItem(FilterCache::E_TYPE, sType);
        aLock.clear();
        // <- SAFE --------------------------
    }
    catch(const css::container::NoSuchElementException&)
    {
        sType.clear();
        bBreakDetection = true;
    }

    if (!bBreakDetection)
    {
        // We can't check a preselected type for a given stream!
        // So we must believe, that it can work ...
        if ( aParsedURL.Complete == "private:stream" )
            bBreakDetection = true;
    }

    if (!bBreakDetection)
    {
        // extract extension from URL .. to check it case-insensitive !
        INetURLObject   aParser    (aParsedURL.Main);
        OUString sExtension = aParser.getExtension(INetURLObject::LAST_SEGMENT       ,
                                                          true                          ,
                                                          INetURLObject::DECODE_WITH_CHARSET);
        sExtension = sExtension.toAsciiLowerCase();

        // otherwise we must know, if it matches to the given URL really.
        // especially if it matches by its extension or pattern registration.
        OUStringList lExtensions(comphelper::sequenceToContainer<OUStringList>(aType[PROPNAME_EXTENSIONS].get<css::uno::Sequence<OUString> >() ));
        OUStringList lURLPattern(comphelper::sequenceToContainer<OUStringList>(aType[PROPNAME_URLPATTERN].get<css::uno::Sequence<OUString> >() ));

        for (OUStringList::const_iterator pIt  = lExtensions.begin();
                                          pIt != lExtensions.end()  ;
                                        ++pIt                       )
        {
            OUString sCheckExtension(pIt->toAsciiLowerCase());
            if (sCheckExtension.equals(sExtension))
            {
                bBreakDetection        = true;
                bMatchByExtension      = true;
                break;
            }
        }

        if (!bBreakDetection)
        {
            for (OUStringList::const_iterator pIt  = lURLPattern.begin();
                                              pIt != lURLPattern.end()  ;
                                            ++pIt                       )
            {
                WildCard aCheck(*pIt);
                if (aCheck.Matches(aParsedURL.Main))
                {
                    bMatchByPattern        = true;
                    break;
                }
            }
        }
    }

    // if it's a valid type - set it on all return values!
    if (!sType.isEmpty())
    {
        FlatDetection::iterator it = std::find_if(rFlatTypes.begin(), rFlatTypes.end(), FindByType(sType));
        if (it != rFlatTypes.end())
        {
            if (bMatchByExtension)
                it->bMatchByExtension = true;
            if (bMatchByPattern)
                it->bMatchByPattern = true;
            if (bDocService)
                it->bPreselectedByDocumentService = true;
        }

        return true;
    }

    // not valid!
    return false;
}

bool TypeDetection::impl_getPreselectionForDocumentService(
    const OUString& sPreSelDocumentService, const util::URL& aParsedURL, FlatDetection& rFlatTypes)
{
    // get all filters, which match to this doc service
    OUStringList lFilters;
    try
    {
        // SAFE -> --------------------------
        ::osl::ResettableMutexGuard aLock(m_aLock);

        // Attention: For executing next lines of code, We must be sure that
        // all filters already loaded :-(
        // That can disturb our "load on demand feature". But we have no other chance!
        m_rCache->load(FilterCache::E_CONTAINS_FILTERS);

        CacheItem lIProps;
        lIProps[PROPNAME_DOCUMENTSERVICE] <<= sPreSelDocumentService;
        lFilters = m_rCache->getMatchingItemsByProps(FilterCache::E_FILTER, lIProps);

        aLock.clear();
        // <- SAFE --------------------------
    }
    catch (const css::container::NoSuchElementException&)
    {
        lFilters.clear();
    }

    // step over all filters, and check if its registered type
    // match the given URL.
    // But use temp. list of "preselected types" instead of incoming rFlatTypes list!
    // The reason behind: we must filter the obtained results. And copying stl entries
    // is an easier job than removing them .-)
    for (OUStringList::const_iterator pFilter  = lFilters.begin();
         pFilter != lFilters.end();
         ++pFilter)
    {
        OUString aType = impl_getTypeFromFilter(*pFilter);
        if (aType.isEmpty())
            continue;

        impl_getPreselectionForType(aType, aParsedURL, rFlatTypes, true);
    }

    return true;
}

OUString TypeDetection::impl_getTypeFromFilter(const OUString& rFilterName)
{
    CacheItem aFilter;
    try
    {
        osl::MutexGuard aLock(m_aLock);
        aFilter = m_rCache->getItem(FilterCache::E_FILTER, rFilterName);
    }
    catch (const container::NoSuchElementException&)
    {
        return OUString();
    }

    OUString aType;
    aFilter[PROPNAME_TYPE] >>= aType;
    return aType;
}

void TypeDetection::impl_getAllFormatTypes(
    const util::URL& aParsedURL, utl::MediaDescriptor& rDescriptor, FlatDetection& rFlatTypes)
{
    rFlatTypes.clear();

    // Get all filters that we have.
    OUStringList aFilterNames;
    try
    {
        osl::MutexGuard aLock(m_aLock);
        m_rCache->load(FilterCache::E_CONTAINS_FILTERS);
        aFilterNames = m_rCache->getItemNames(FilterCache::E_FILTER);
    }
    catch (const container::NoSuchElementException&)
    {
        return;
    }

    // Retrieve the default type for each of these filters, and store them.
    for (OUStringList::const_iterator it = aFilterNames.begin(); it != aFilterNames.end(); ++it)
    {
        OUString aType = impl_getTypeFromFilter(*it);

        if (aType.isEmpty())
            continue;

        FlatDetectionInfo aInfo; // all flags set to false by default.
        aInfo.sType = aType;
        rFlatTypes.push_back(aInfo);
    }

    {
        // Get all types that match the URL alone.
        FlatDetection aFlatByURL;
        m_rCache->detectFlatForURL(aParsedURL, aFlatByURL);
        FlatDetection::const_iterator it = aFlatByURL.begin(), itEnd = aFlatByURL.end();
        for (; it != itEnd; ++it)
        {
            FlatDetection::iterator itPos = std::find_if(rFlatTypes.begin(), rFlatTypes.end(), FindByType(it->sType));
            if (itPos == rFlatTypes.end())
                // Not in the list yet.
                rFlatTypes.push_back(*it);
            else
            {
                // Already in the list. Update the flags.
                FlatDetectionInfo& rInfo = *itPos;
                const FlatDetectionInfo& rThisInfo = *it;
                if (rThisInfo.bMatchByExtension)
                    rInfo.bMatchByExtension = true;
                if (rThisInfo.bMatchByPattern)
                    rInfo.bMatchByPattern = true;
                if (rThisInfo.bPreselectedByDocumentService)
                    rInfo.bPreselectedByDocumentService = true;
            }
        }
    }

    // Remove duplicates.
    rFlatTypes.sort(SortByType());
    rFlatTypes.unique(EqualByType());

    // Mark pre-selected type (if any) to have it prioritized.
    OUString sSelectedType = rDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_TYPENAME(), OUString());
    if (!sSelectedType.isEmpty())
        impl_getPreselectionForType(sSelectedType, aParsedURL, rFlatTypes, false);

    // Mark all types preferred by the current document service, to have it prioritized.
    OUString sSelectedDoc = rDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_DOCUMENTSERVICE(), OUString());
    if (!sSelectedDoc.isEmpty())
        impl_getPreselectionForDocumentService(sSelectedDoc, aParsedURL, rFlatTypes);
}



OUString TypeDetection::impl_detectTypeFlatAndDeep(      utl::MediaDescriptor& rDescriptor   ,
                                                          const FlatDetection&                 lFlatTypes    ,
                                                                bool                       bAllowDeep    ,
                                                                OUStringList&                  rUsedDetectors,
                                                                OUString&               rLastChance   )
{
    // reset it everytimes, so the outside code can distinguish between
    // a set and a not set value.
    rLastChance.clear();
    rUsedDetectors.clear();

    // step over all possible types for this URL.
    // solutions:
    // a) no types                                => no detection
    // b) deep detection not allowed              => return first valid type of list (because its the preferred or the first valid one)
    //    or(!) match by URLPattern               => in such case a deep detection will be suppressed!
    // c) type has no detect service              => safe the first occurred type without a detect service
    //                                               as "last chance"(!). It will be used outside of this method
    //                                               if no further type could be detected.
    //                                               It must be the first one, because it can be a preferred type.
    //                                               Our types list was sorted by such criteria!
    // d) detect service return a valid result    => return its decision
    // e) detect service return an invalid result
    //    or any needed information could not be
    //    obtained from the cache                 => ignore it, and continue with search

    for (FlatDetection::const_iterator pFlatIt  = lFlatTypes.begin();
                                       pFlatIt != lFlatTypes.end()  ;
                                     ++pFlatIt                      )
    {
        const FlatDetectionInfo& aFlatTypeInfo = *pFlatIt;
        OUString sFlatType = aFlatTypeInfo.sType;

        if (!impl_validateAndSetTypeOnDescriptor(rDescriptor, sFlatType))
            continue;

        // b)
        if (
            (!bAllowDeep                  ) ||
            (aFlatTypeInfo.bMatchByPattern)
           )
        {
            return sFlatType;
        }

        try
        {
            // SAFE -> ----------------------------------
            ::osl::ResettableMutexGuard aLock(m_aLock);
            CacheItem aType = m_rCache->getItem(FilterCache::E_TYPE, sFlatType);
            aLock.clear();

            OUString sDetectService;
            aType[PROPNAME_DETECTSERVICE] >>= sDetectService;

            // c)
            if (sDetectService.isEmpty())
            {
                // flat detected types without any registered deep detection service and not
                // preselected by the user can be used as LAST CHANCE in case no other type could
                // be detected. Of course only the first type without deep detector can be used.
                // Further ones has to be ignored.
                if (rLastChance.isEmpty())
                    rLastChance = sFlatType;

                continue;
            }

            // dont forget to add every real asked deep detection service here.
            // Such detectors will be ignored if may be "impl_detectTypeDeepOnly()"
            // must be called later!
            rUsedDetectors.push_back(sDetectService);
            OUString sDeepType = impl_askDetectService(sDetectService, rDescriptor);

            // d)
            if (!sDeepType.isEmpty())
                return sDeepType;
        }
        catch(const css::container::NoSuchElementException&)
            {}
        // e)
    }

    return OUString();
    // <- SAFE ----------------------------------
}

void TypeDetection::impl_seekStreamToZero(utl::MediaDescriptor& rDescriptor)
{
    // try to seek to 0 ...
    // But because XSeekable is an optional interface ... try it only .-)
    css::uno::Reference< css::io::XInputStream > xStream = rDescriptor.getUnpackedValueOrDefault(
                                                            utl::MediaDescriptor::PROP_INPUTSTREAM(),
                                                            css::uno::Reference< css::io::XInputStream >());
    css::uno::Reference< css::io::XSeekable > xSeek(xStream, css::uno::UNO_QUERY);
    if (xSeek.is())
    {
        try
        {
            xSeek->seek(0);
        }
        catch(const css::uno::RuntimeException&)
        {
            throw;
        }
        catch(const css::uno::Exception&)
        {
        }
    }
}

OUString TypeDetection::impl_askDetectService(const OUString&               sDetectService,
                                                           utl::MediaDescriptor& rDescriptor   )
{
    // Open the stream and add it to the media descriptor if this method is called for the first time.
    // All following requests to this method will detect, that there already exists a stream .-)
    // Attention: This method throws an exception if the stream could not be opened.
    // It's important to break any further detection in such case.
    // Catch it on the highest detection level only !!!
    impl_openStream(rDescriptor);

    // seek to 0 is an optional feature to be more robust against
    // "simple implemented detect services" .-)
    impl_seekStreamToZero(rDescriptor);

    css::uno::Reference< css::document::XExtendedFilterDetection > xDetector;
    css::uno::Reference< css::uno::XComponentContext >         xContext;

    // SAFE ->
    ::osl::ResettableMutexGuard aLock(m_aLock);
    xContext = m_xContext;
    aLock.clear();
    // <- SAFE

    try
    {
        // Attention! If e.g. an office module was not installed sometimes we
        // find a registered detect service, which is referred inside the
        // configuration ... but not really installed. On the other side we use
        // third party components here, which can make trouble anyway.  So we
        // should handle errors during creation of such services more
        // gracefully .-)
        xDetector = css::uno::Reference< css::document::XExtendedFilterDetection >(
                xContext->getServiceManager()->createInstanceWithContext(sDetectService, xContext),
                css::uno::UNO_QUERY_THROW);
    }
    catch (...)
    {
    }

    if ( ! xDetector.is())
        return OUString();

    OUString sDeepType;
    try
    {
        // start deep detection
        // Dont forget to convert stl descriptor to its uno representation.

        /* Attention!
                You have to use an explicit instance of this uno sequence ...
                Because its used as an in out parameter. And in case of a temp. used object
                we will run into memory corruptions!
        */
        css::uno::Sequence< css::beans::PropertyValue > lDescriptor;
        rDescriptor >> lDescriptor;
        sDeepType = xDetector->detect(lDescriptor);
        rDescriptor << lDescriptor;
    }
    catch(const css::uno::Exception&)
        {
            // We should ignore errors here.
            // Thrown exceptions mostly will end in crash recovery ...
            // But might be we find another deep detection service which can detect the same
            // document without a problem .-)
            sDeepType.clear();
        }

    // seek to 0 is an optional feature to be more robust against
    // "simple implemented detect services" .-)
    impl_seekStreamToZero(rDescriptor);

    // analyze the results
    // a) detect service returns "" => return "" too and remove TYPE/FILTER prop from descriptor
    // b) returned type is unknown  => return "" too and remove TYPE/FILTER prop from descriptor
    // c) returned type is valid    => check TYPE/FILTER props inside descriptor and return the type

    // this special helper checks for a valid type
    // and set right values on the descriptor!
    bool bValidType = impl_validateAndSetTypeOnDescriptor(rDescriptor, sDeepType);
    if (bValidType)
        return sDeepType;

    return OUString();
}



OUString TypeDetection::impl_askUserForTypeAndFilterIfAllowed(utl::MediaDescriptor& rDescriptor)
{
    css::uno::Reference< css::task::XInteractionHandler > xInteraction =
        rDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_INTERACTIONHANDLER(),
        css::uno::Reference< css::task::XInteractionHandler >());

    if (!xInteraction.is())
        return OUString();

    OUString sURL =
        rDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_URL(),
        OUString());

    css::uno::Reference< css::io::XInputStream > xStream =
        rDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_INPUTSTREAM(),
        css::uno::Reference< css::io::XInputStream >());

    // Dont distrub the user for "non existing files - means empty URLs" or
    // if we was forced to detect a stream.
    // Reason behind: We must be sure to ask user for "unknown contents" only ...
    // and not for "missing files". Especially if detection is done by a stream only
    // we can't check if the stream points to an "existing content"!
    if (
        (sURL.isEmpty()                                     ) || // "non existing file" ?
        (!xStream.is()                                         ) || // non existing file !
        (sURL.equalsIgnoreAsciiCase("private:stream"))    // not a good idea .-)
       )
        return OUString();

    try
    {
        // create a new request to ask user for it's decision about the usable filter
        ::framework::RequestFilterSelect aRequest(sURL);
        xInteraction->handle(aRequest.GetRequest());

        // "Cancel" pressed? => return with error
        if (aRequest.isAbort())
            return OUString();

        // "OK" pressed => verify the selected filter, get its corresponding
        // type and return it. (BTW: We must update the media descriptor here ...)
        // The user selected explicitly a filter ... but normaly we are interested on
        // a type here only. But we must be sure, that the selected filter is used
        // too and no ambigous filter registration disturb us .-)

        OUString sFilter = aRequest.getFilter();
        if (!impl_validateAndSetFilterOnDescriptor(rDescriptor, sFilter))
            return OUString();

        OUString sType;
        rDescriptor[utl::MediaDescriptor::PROP_TYPENAME()] >>= sType;
        return sType;
    }
    catch(const css::uno::Exception&)
        {}

    return OUString();
}



void TypeDetection::impl_openStream(utl::MediaDescriptor& rDescriptor)
    throw (css::uno::Exception)
{
    bool bSuccess = false;
    OUString sURL = rDescriptor.getUnpackedValueOrDefault( utl::MediaDescriptor::PROP_URL(), OUString() );
    bool bRequestedReadOnly = rDescriptor.getUnpackedValueOrDefault( utl::MediaDescriptor::PROP_READONLY(), false );
    if ( comphelper::isFileUrl( sURL ) )
    {
        // OOo uses own file locking mechanics in case of local file
        bSuccess = rDescriptor.addInputStreamOwnLock();
    }
    else
        bSuccess = rDescriptor.addInputStream();

    if ( !bSuccess )
        throw css::uno::Exception(
            "Could not open stream for <" + sURL + ">",
            static_cast<OWeakObject *>(this));

    if ( !bRequestedReadOnly )
    {
        // The MediaDescriptor implementation adds ReadOnly argument if the file can not be opened for writing
        // this argument should be either removed or an additional argument should be added so that application
        // can separate the case when the user explicitly requests readonly document.
        // The current solution is to remove it here.
        rDescriptor.erase( utl::MediaDescriptor::PROP_READONLY() );
    }
}



void TypeDetection::impl_removeTypeFilterFromDescriptor(utl::MediaDescriptor& rDescriptor)
{
    utl::MediaDescriptor::iterator pItType   = rDescriptor.find(utl::MediaDescriptor::PROP_TYPENAME()  );
    utl::MediaDescriptor::iterator pItFilter = rDescriptor.find(utl::MediaDescriptor::PROP_FILTERNAME());
    if (pItType != rDescriptor.end())
        rDescriptor.erase(pItType);
    if (pItFilter != rDescriptor.end())
        rDescriptor.erase(pItFilter);
}



bool TypeDetection::impl_validateAndSetTypeOnDescriptor(      utl::MediaDescriptor& rDescriptor,
                                                            const OUString&               sType      )
{
    // SAFE ->
    ::osl::ResettableMutexGuard aLock(m_aLock);
    if (m_rCache->hasItem(FilterCache::E_TYPE, sType))
    {
        rDescriptor[utl::MediaDescriptor::PROP_TYPENAME()] <<= sType;
        return true;
    }
    aLock.clear();
    // <- SAFE

    // remove all related information from the descriptor
    impl_removeTypeFilterFromDescriptor(rDescriptor);
    return false;
}



bool TypeDetection::impl_validateAndSetFilterOnDescriptor(      utl::MediaDescriptor& rDescriptor,
                                                              const OUString&               sFilter    )
{
    try
    {
        // SAFE ->
        ::osl::ResettableMutexGuard aLock(m_aLock);

        CacheItem aFilter = m_rCache->getItem(FilterCache::E_FILTER, sFilter);
        OUString sType;
        aFilter[PROPNAME_TYPE] >>= sType;
        CacheItem aType = m_rCache->getItem(FilterCache::E_TYPE, sType);

        aLock.clear();
        // <- SAFE

        // found valid type and filter => set it on the given descriptor
        rDescriptor[utl::MediaDescriptor::PROP_TYPENAME()  ] <<= sType  ;
        rDescriptor[utl::MediaDescriptor::PROP_FILTERNAME()] <<= sFilter;
        return true;
    }
    catch(const css::container::NoSuchElementException&){}

    // remove all related information from the descriptor
    impl_removeTypeFilterFromDescriptor(rDescriptor);
    return false;
}



OUString TypeDetection::impl_getImplementationName()
{
    return OUString( "com.sun.star.comp.filter.config.TypeDetection" );
}



css::uno::Sequence< OUString > TypeDetection::impl_getSupportedServiceNames()
{
    css::uno::Sequence< OUString > lServiceNames(1);
    lServiceNames[0] = "com.sun.star.document.TypeDetection";
    return lServiceNames;
}



css::uno::Reference< css::uno::XInterface > SAL_CALL TypeDetection::impl_createInstance(const css::uno::Reference< css::lang::XMultiServiceFactory >& xSMGR)
{
    TypeDetection* pNew = new TypeDetection( comphelper::getComponentContext(xSMGR) );
    return css::uno::Reference< css::uno::XInterface >(static_cast< css::document::XTypeDetection* >(pNew), css::uno::UNO_QUERY);
}

    } // namespace config
} // namespace filter

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