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
1252
1253
1254
1255
1256
1257
1258
1259
1260
// 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.

//! Configuration via [`WriterProperties`] and [`ReaderProperties`]
use std::str::FromStr;
use std::{collections::HashMap, sync::Arc};

use crate::basic::{Compression, Encoding};
use crate::compression::{CodecOptions, CodecOptionsBuilder};
use crate::file::metadata::KeyValue;
use crate::format::SortingColumn;
use crate::schema::types::ColumnPath;

/// Default value for [`WriterProperties::data_page_size_limit`]
pub const DEFAULT_PAGE_SIZE: usize = 1024 * 1024;
/// Default value for [`WriterProperties::write_batch_size`]
pub const DEFAULT_WRITE_BATCH_SIZE: usize = 1024;
/// Default value for [`WriterProperties::writer_version`]
pub const DEFAULT_WRITER_VERSION: WriterVersion = WriterVersion::PARQUET_1_0;
/// Default value for [`WriterProperties::compression`]
pub const DEFAULT_COMPRESSION: Compression = Compression::UNCOMPRESSED;
/// Default value for [`WriterProperties::dictionary_enabled`]
pub const DEFAULT_DICTIONARY_ENABLED: bool = true;
/// Default value for [`WriterProperties::dictionary_page_size_limit`]
pub const DEFAULT_DICTIONARY_PAGE_SIZE_LIMIT: usize = DEFAULT_PAGE_SIZE;
/// Default value for [`WriterProperties::statistics_enabled`]
pub const DEFAULT_STATISTICS_ENABLED: EnabledStatistics = EnabledStatistics::Page;
/// Default value for [`WriterProperties::max_statistics_size`]
pub const DEFAULT_MAX_STATISTICS_SIZE: usize = 4096;
/// Default value for [`WriterProperties::max_row_group_size`]
pub const DEFAULT_MAX_ROW_GROUP_SIZE: usize = 1024 * 1024;
/// Default value for [`WriterProperties::created_by`]
pub const DEFAULT_CREATED_BY: &str = concat!("parquet-rs version ", env!("CARGO_PKG_VERSION"));
/// Default value for [`WriterProperties::column_index_truncate_length`]
pub const DEFAULT_COLUMN_INDEX_TRUNCATE_LENGTH: Option<usize> = Some(64);
/// Default value for [`BloomFilterProperties::fpp`]
pub const DEFAULT_BLOOM_FILTER_FPP: f64 = 0.05;
/// Default value for [`BloomFilterProperties::ndv`]
pub const DEFAULT_BLOOM_FILTER_NDV: u64 = 1_000_000_u64;
/// Default values for [`WriterProperties::statistics_truncate_length`]
pub const DEFAULT_STATISTICS_TRUNCATE_LENGTH: Option<usize> = None;

/// Parquet writer version.
///
/// Basic constant, which is not part of the Thrift definition.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
#[allow(non_camel_case_types)]
pub enum WriterVersion {
    PARQUET_1_0,
    PARQUET_2_0,
}

impl WriterVersion {
    /// Returns writer version as `i32`.
    pub fn as_num(&self) -> i32 {
        match self {
            WriterVersion::PARQUET_1_0 => 1,
            WriterVersion::PARQUET_2_0 => 2,
        }
    }
}

impl FromStr for WriterVersion {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "PARQUET_1_0" | "parquet_1_0" => Ok(WriterVersion::PARQUET_1_0),
            "PARQUET_2_0" | "parquet_2_0" => Ok(WriterVersion::PARQUET_2_0),
            _ => Err(format!("Invalid writer version: {}", s)),
        }
    }
}

/// Reference counted writer properties.
pub type WriterPropertiesPtr = Arc<WriterProperties>;

/// Configuration settings for writing parquet files.
///
/// All properties except the key-value metadata are immutable,
/// use [`WriterPropertiesBuilder`] to assemble these properties.
///
/// # Example
///
/// ```rust
/// use parquet::{
///     basic::{Compression, Encoding},
///     file::properties::*,
///     schema::types::ColumnPath,
/// };
///
/// // Create properties with default configuration.
/// let props = WriterProperties::default();
///
/// // Use properties builder to set certain options and assemble the configuration.
/// let props = WriterProperties::builder()
///     .set_writer_version(WriterVersion::PARQUET_1_0)
///     .set_encoding(Encoding::PLAIN)
///     .set_column_encoding(ColumnPath::from("col1"), Encoding::DELTA_BINARY_PACKED)
///     .set_compression(Compression::SNAPPY)
///     .build();
///
/// assert_eq!(props.writer_version(), WriterVersion::PARQUET_1_0);
/// assert_eq!(
///     props.encoding(&ColumnPath::from("col1")),
///     Some(Encoding::DELTA_BINARY_PACKED)
/// );
/// assert_eq!(
///     props.encoding(&ColumnPath::from("col2")),
///     Some(Encoding::PLAIN)
/// );
/// ```
#[derive(Debug, Clone)]
pub struct WriterProperties {
    data_page_size_limit: usize,
    dictionary_page_size_limit: usize,
    data_page_row_count_limit: usize,
    write_batch_size: usize,
    max_row_group_size: usize,
    writer_version: WriterVersion,
    created_by: String,
    pub(crate) key_value_metadata: Option<Vec<KeyValue>>,
    default_column_properties: ColumnProperties,
    column_properties: HashMap<ColumnPath, ColumnProperties>,
    sorting_columns: Option<Vec<SortingColumn>>,
    column_index_truncate_length: Option<usize>,
    statistics_truncate_length: Option<usize>,
}

impl Default for WriterProperties {
    fn default() -> Self {
        Self::builder().build()
    }
}

impl WriterProperties {
    /// Create a new [`WriterProperties`] with the default settings
    ///
    /// See [`WriterProperties::builder`] for customising settings
    pub fn new() -> Self {
        Self::default()
    }

    /// Returns builder for writer properties with default values.
    pub fn builder() -> WriterPropertiesBuilder {
        WriterPropertiesBuilder::with_defaults()
    }

    /// Returns data page size limit.
    ///
    /// Note: this is a best effort limit based on the write batch size
    #[deprecated(since = "41.0.0", note = "Use data_page_size_limit")]
    pub fn data_pagesize_limit(&self) -> usize {
        self.data_page_size_limit
    }

    /// Returns data page size limit.
    ///
    /// Note: this is a best effort limit based on the write batch size
    ///
    /// For more details see [`WriterPropertiesBuilder::set_data_page_size_limit`]
    pub fn data_page_size_limit(&self) -> usize {
        self.data_page_size_limit
    }

    /// Returns dictionary page size limit.
    ///
    /// Note: this is a best effort limit based on the write batch size
    #[deprecated(since = "41.0.0", note = "Use dictionary_page_size_limit")]
    pub fn dictionary_pagesize_limit(&self) -> usize {
        self.dictionary_page_size_limit
    }

    /// Returns dictionary page size limit.
    ///
    /// Note: this is a best effort limit based on the write batch size
    ///
    /// For more details see [`WriterPropertiesBuilder::set_dictionary_page_size_limit`]
    pub fn dictionary_page_size_limit(&self) -> usize {
        self.dictionary_page_size_limit
    }

    /// Returns the maximum page row count
    ///
    /// Note: this is a best effort limit based on the write batch size
    ///
    /// For more details see [`WriterPropertiesBuilder::set_data_page_row_count_limit`]
    pub fn data_page_row_count_limit(&self) -> usize {
        self.data_page_row_count_limit
    }

    /// Returns configured batch size for writes.
    ///
    /// When writing a batch of data, this setting allows to split it internally into
    /// smaller batches so we can better estimate the size of a page currently being
    /// written.
    pub fn write_batch_size(&self) -> usize {
        self.write_batch_size
    }

    /// Returns maximum number of rows in a row group.
    pub fn max_row_group_size(&self) -> usize {
        self.max_row_group_size
    }

    /// Returns configured writer version.
    pub fn writer_version(&self) -> WriterVersion {
        self.writer_version
    }

    /// Returns `created_by` string.
    pub fn created_by(&self) -> &str {
        &self.created_by
    }

    /// Returns `key_value_metadata` KeyValue pairs.
    pub fn key_value_metadata(&self) -> Option<&Vec<KeyValue>> {
        self.key_value_metadata.as_ref()
    }

    /// Returns sorting columns.
    pub fn sorting_columns(&self) -> Option<&Vec<SortingColumn>> {
        self.sorting_columns.as_ref()
    }

    /// Returns the maximum length of truncated min/max values in the column index.
    ///
    /// `None` if truncation is disabled, must be greater than 0 otherwise.
    pub fn column_index_truncate_length(&self) -> Option<usize> {
        self.column_index_truncate_length
    }

    /// Returns the maximum length of truncated min/max values in statistics.
    ///
    /// `None` if truncation is disabled, must be greater than 0 otherwise.
    pub fn statistics_truncate_length(&self) -> Option<usize> {
        self.statistics_truncate_length
    }

    /// Returns encoding for a data page, when dictionary encoding is enabled.
    /// This is not configurable.
    #[inline]
    pub fn dictionary_data_page_encoding(&self) -> Encoding {
        // PLAIN_DICTIONARY encoding is deprecated in writer version 1.
        // Dictionary values are encoded using RLE_DICTIONARY encoding.
        Encoding::RLE_DICTIONARY
    }

    /// Returns encoding for dictionary page, when dictionary encoding is enabled.
    /// This is not configurable.
    #[inline]
    pub fn dictionary_page_encoding(&self) -> Encoding {
        // PLAIN_DICTIONARY is deprecated in writer version 1.
        // Dictionary is encoded using plain encoding.
        Encoding::PLAIN
    }

    /// Returns encoding for a column, if set.
    /// In case when dictionary is enabled, returns fallback encoding.
    ///
    /// If encoding is not set, then column writer will choose the best encoding
    /// based on the column type.
    pub fn encoding(&self, col: &ColumnPath) -> Option<Encoding> {
        self.column_properties
            .get(col)
            .and_then(|c| c.encoding())
            .or_else(|| self.default_column_properties.encoding())
    }

    /// Returns compression codec for a column.
    pub fn compression(&self, col: &ColumnPath) -> Compression {
        self.column_properties
            .get(col)
            .and_then(|c| c.compression())
            .or_else(|| self.default_column_properties.compression())
            .unwrap_or(DEFAULT_COMPRESSION)
    }

    /// Returns `true` if dictionary encoding is enabled for a column.
    pub fn dictionary_enabled(&self, col: &ColumnPath) -> bool {
        self.column_properties
            .get(col)
            .and_then(|c| c.dictionary_enabled())
            .or_else(|| self.default_column_properties.dictionary_enabled())
            .unwrap_or(DEFAULT_DICTIONARY_ENABLED)
    }

    /// Returns `true` if statistics are enabled for a column.
    pub fn statistics_enabled(&self, col: &ColumnPath) -> EnabledStatistics {
        self.column_properties
            .get(col)
            .and_then(|c| c.statistics_enabled())
            .or_else(|| self.default_column_properties.statistics_enabled())
            .unwrap_or(DEFAULT_STATISTICS_ENABLED)
    }

    /// Returns max size for statistics.
    /// Only applicable if statistics are enabled.
    pub fn max_statistics_size(&self, col: &ColumnPath) -> usize {
        self.column_properties
            .get(col)
            .and_then(|c| c.max_statistics_size())
            .or_else(|| self.default_column_properties.max_statistics_size())
            .unwrap_or(DEFAULT_MAX_STATISTICS_SIZE)
    }

    /// Returns the [`BloomFilterProperties`] for the given column
    ///
    /// Returns `None` if bloom filter is disabled
    pub fn bloom_filter_properties(&self, col: &ColumnPath) -> Option<&BloomFilterProperties> {
        self.column_properties
            .get(col)
            .and_then(|c| c.bloom_filter_properties())
            .or_else(|| self.default_column_properties.bloom_filter_properties())
    }
}

/// Builder for parquet file writer configuration. See example on
/// [`WriterProperties`]
pub struct WriterPropertiesBuilder {
    data_page_size_limit: usize,
    dictionary_page_size_limit: usize,
    data_page_row_count_limit: usize,
    write_batch_size: usize,
    max_row_group_size: usize,
    writer_version: WriterVersion,
    created_by: String,
    key_value_metadata: Option<Vec<KeyValue>>,
    default_column_properties: ColumnProperties,
    column_properties: HashMap<ColumnPath, ColumnProperties>,
    sorting_columns: Option<Vec<SortingColumn>>,
    column_index_truncate_length: Option<usize>,
    statistics_truncate_length: Option<usize>,
}

impl WriterPropertiesBuilder {
    /// Returns default state of the builder.
    fn with_defaults() -> Self {
        Self {
            data_page_size_limit: DEFAULT_PAGE_SIZE,
            dictionary_page_size_limit: DEFAULT_DICTIONARY_PAGE_SIZE_LIMIT,
            data_page_row_count_limit: usize::MAX,
            write_batch_size: DEFAULT_WRITE_BATCH_SIZE,
            max_row_group_size: DEFAULT_MAX_ROW_GROUP_SIZE,
            writer_version: DEFAULT_WRITER_VERSION,
            created_by: DEFAULT_CREATED_BY.to_string(),
            key_value_metadata: None,
            default_column_properties: Default::default(),
            column_properties: HashMap::new(),
            sorting_columns: None,
            column_index_truncate_length: DEFAULT_COLUMN_INDEX_TRUNCATE_LENGTH,
            statistics_truncate_length: DEFAULT_STATISTICS_TRUNCATE_LENGTH,
        }
    }

    /// Finalizes the configuration and returns immutable writer properties struct.
    pub fn build(self) -> WriterProperties {
        WriterProperties {
            data_page_size_limit: self.data_page_size_limit,
            dictionary_page_size_limit: self.dictionary_page_size_limit,
            data_page_row_count_limit: self.data_page_row_count_limit,
            write_batch_size: self.write_batch_size,
            max_row_group_size: self.max_row_group_size,
            writer_version: self.writer_version,
            created_by: self.created_by,
            key_value_metadata: self.key_value_metadata,
            default_column_properties: self.default_column_properties,
            column_properties: self.column_properties,
            sorting_columns: self.sorting_columns,
            column_index_truncate_length: self.column_index_truncate_length,
            statistics_truncate_length: self.statistics_truncate_length,
        }
    }

    // ----------------------------------------------------------------------
    // Writer properties related to a file

    /// Sets writer version.
    pub fn set_writer_version(mut self, value: WriterVersion) -> Self {
        self.writer_version = value;
        self
    }

    /// Sets best effort maximum size of a data page in bytes.
    ///
    /// Note: this is a best effort limit based on value of
    /// [`set_write_batch_size`](Self::set_write_batch_size).
    #[deprecated(since = "41.0.0", note = "Use set_data_page_size_limit")]
    pub fn set_data_pagesize_limit(mut self, value: usize) -> Self {
        self.data_page_size_limit = value;
        self
    }

    /// Sets best effort maximum size of a data page in bytes.
    ///
    /// The parquet writer will attempt to limit the sizes of each
    /// `DataPage` to this many bytes. Reducing this value will result
    /// in larger parquet files, but may improve the effectiveness of
    /// page index based predicate pushdown during reading.
    ///
    /// Note: this is a best effort limit based on value of
    /// [`set_write_batch_size`](Self::set_write_batch_size).
    pub fn set_data_page_size_limit(mut self, value: usize) -> Self {
        self.data_page_size_limit = value;
        self
    }

    /// Sets best effort maximum number of rows in a data page.
    ///
    /// The parquet writer will attempt to limit the number of rows in
    /// each `DataPage` to this value. Reducing this value will result
    /// in larger parquet files, but may improve the effectiveness of
    /// page index based predicate pushdown during reading.
    ///
    /// Note: this is a best effort limit based on value of
    /// [`set_write_batch_size`](Self::set_write_batch_size).
    pub fn set_data_page_row_count_limit(mut self, value: usize) -> Self {
        self.data_page_row_count_limit = value;
        self
    }

    /// Sets best effort maximum dictionary page size, in bytes.
    ///
    /// Note: this is a best effort limit based on value of
    /// [`set_write_batch_size`](Self::set_write_batch_size).
    #[deprecated(since = "41.0.0", note = "Use set_dictionary_page_size_limit")]
    pub fn set_dictionary_pagesize_limit(mut self, value: usize) -> Self {
        self.dictionary_page_size_limit = value;
        self
    }

    /// Sets best effort maximum dictionary page size, in bytes.
    ///
    /// The parquet writer will attempt to limit the size of each
    /// `DataPage` used to store dictionaries to this many
    /// bytes. Reducing this value will result in larger parquet
    /// files, but may improve the effectiveness of page index based
    /// predicate pushdown during reading.
    ///
    /// Note: this is a best effort limit based on value of
    /// [`set_write_batch_size`](Self::set_write_batch_size).
    pub fn set_dictionary_page_size_limit(mut self, value: usize) -> Self {
        self.dictionary_page_size_limit = value;
        self
    }

    /// Sets write batch size.
    ///
    /// For performance reasons, data for each column is written in
    /// batches of this size.
    ///
    /// Additional limits such as such as
    /// [`set_data_page_row_count_limit`](Self::set_data_page_row_count_limit)
    /// are checked between batches, and thus the write batch size value acts as an
    /// upper-bound on the enforcement granularity of other limits.
    pub fn set_write_batch_size(mut self, value: usize) -> Self {
        self.write_batch_size = value;
        self
    }

    /// Sets maximum number of rows in a row group.
    pub fn set_max_row_group_size(mut self, value: usize) -> Self {
        assert!(value > 0, "Cannot have a 0 max row group size");
        self.max_row_group_size = value;
        self
    }

    /// Sets "created by" property.
    pub fn set_created_by(mut self, value: String) -> Self {
        self.created_by = value;
        self
    }

    /// Sets "key_value_metadata" property.
    pub fn set_key_value_metadata(mut self, value: Option<Vec<KeyValue>>) -> Self {
        self.key_value_metadata = value;
        self
    }

    /// Sets sorting order of rows in the row group if any
    pub fn set_sorting_columns(mut self, value: Option<Vec<SortingColumn>>) -> Self {
        self.sorting_columns = value;
        self
    }

    // ----------------------------------------------------------------------
    // Setters for any column (global)

    /// Sets encoding for any column.
    ///
    /// If dictionary is not enabled, this is treated as a primary encoding for all
    /// columns. In case when dictionary is enabled for any column, this value is
    /// considered to be a fallback encoding for that column.
    ///
    /// Panics if user tries to set dictionary encoding here, regardless of dictionary
    /// encoding flag being set.
    pub fn set_encoding(mut self, value: Encoding) -> Self {
        self.default_column_properties.set_encoding(value);
        self
    }

    /// Sets compression codec for any column.
    pub fn set_compression(mut self, value: Compression) -> Self {
        self.default_column_properties.set_compression(value);
        self
    }

    /// Sets flag to enable/disable dictionary encoding for any column.
    ///
    /// Use this method to set dictionary encoding, instead of explicitly specifying
    /// encoding in `set_encoding` method.
    pub fn set_dictionary_enabled(mut self, value: bool) -> Self {
        self.default_column_properties.set_dictionary_enabled(value);
        self
    }

    /// Sets flag to enable/disable statistics for any column.
    pub fn set_statistics_enabled(mut self, value: EnabledStatistics) -> Self {
        self.default_column_properties.set_statistics_enabled(value);
        self
    }

    /// Sets max statistics size for any column.
    /// Applicable only if statistics are enabled.
    pub fn set_max_statistics_size(mut self, value: usize) -> Self {
        self.default_column_properties
            .set_max_statistics_size(value);
        self
    }

    /// Sets whether bloom filter is enabled for any column.
    /// If the bloom filter is enabled previously then it is a no-op.
    /// If the bloom filter is not yet enabled, a default set of ndv and fpp value will be used.
    /// You can use [`set_bloom_filter_ndv`](Self::set_bloom_filter_ndv) and [`set_bloom_filter_fpp`](Self::set_bloom_filter_fpp) to further adjust the ndv and fpp.
    pub fn set_bloom_filter_enabled(mut self, value: bool) -> Self {
        self.default_column_properties
            .set_bloom_filter_enabled(value);
        self
    }

    /// Sets bloom filter false positive probability (fpp) for any column.
    /// Implicitly [`set_bloom_filter_enabled`](Self::set_bloom_filter_enabled).
    pub fn set_bloom_filter_fpp(mut self, value: f64) -> Self {
        self.default_column_properties.set_bloom_filter_fpp(value);
        self
    }

    /// Sets number of distinct values (ndv) for bloom filter for any column.
    /// Implicitly [`set_bloom_filter_enabled`](Self::set_bloom_filter_enabled).
    pub fn set_bloom_filter_ndv(mut self, value: u64) -> Self {
        self.default_column_properties.set_bloom_filter_ndv(value);
        self
    }

    // ----------------------------------------------------------------------
    // Setters for a specific column

    /// Helper method to get existing or new mutable reference of column properties.
    #[inline]
    fn get_mut_props(&mut self, col: ColumnPath) -> &mut ColumnProperties {
        self.column_properties.entry(col).or_default()
    }

    /// Sets encoding for a column.
    /// Takes precedence over globally defined settings.
    ///
    /// If dictionary is not enabled, this is treated as a primary encoding for this
    /// column. In case when dictionary is enabled for this column, either through
    /// global defaults or explicitly, this value is considered to be a fallback
    /// encoding for this column.
    ///
    /// Panics if user tries to set dictionary encoding here, regardless of dictionary
    /// encoding flag being set.
    pub fn set_column_encoding(mut self, col: ColumnPath, value: Encoding) -> Self {
        self.get_mut_props(col).set_encoding(value);
        self
    }

    /// Sets compression codec for a column.
    /// Takes precedence over globally defined settings.
    pub fn set_column_compression(mut self, col: ColumnPath, value: Compression) -> Self {
        self.get_mut_props(col).set_compression(value);
        self
    }

    /// Sets flag to enable/disable dictionary encoding for a column.
    /// Takes precedence over globally defined settings.
    pub fn set_column_dictionary_enabled(mut self, col: ColumnPath, value: bool) -> Self {
        self.get_mut_props(col).set_dictionary_enabled(value);
        self
    }

    /// Sets flag to enable/disable statistics for a column.
    /// Takes precedence over globally defined settings.
    pub fn set_column_statistics_enabled(
        mut self,
        col: ColumnPath,
        value: EnabledStatistics,
    ) -> Self {
        self.get_mut_props(col).set_statistics_enabled(value);
        self
    }

    /// Sets max size for statistics for a column.
    /// Takes precedence over globally defined settings.
    pub fn set_column_max_statistics_size(mut self, col: ColumnPath, value: usize) -> Self {
        self.get_mut_props(col).set_max_statistics_size(value);
        self
    }

    /// Sets whether a bloom filter should be created for a specific column.
    /// The behavior is similar to [`set_bloom_filter_enabled`](Self::set_bloom_filter_enabled).
    /// Takes precedence over globally defined settings.
    pub fn set_column_bloom_filter_enabled(mut self, col: ColumnPath, value: bool) -> Self {
        self.get_mut_props(col).set_bloom_filter_enabled(value);
        self
    }

    /// Sets the false positive probability for bloom filter for a specific column.
    /// The behavior is similar to [`set_bloom_filter_fpp`](Self::set_bloom_filter_fpp) but will
    /// override the default.
    pub fn set_column_bloom_filter_fpp(mut self, col: ColumnPath, value: f64) -> Self {
        self.get_mut_props(col).set_bloom_filter_fpp(value);
        self
    }

    /// Sets the number of distinct values for bloom filter for a specific column.
    /// The behavior is similar to [`set_bloom_filter_ndv`](Self::set_bloom_filter_ndv) but will
    /// override the default.
    pub fn set_column_bloom_filter_ndv(mut self, col: ColumnPath, value: u64) -> Self {
        self.get_mut_props(col).set_bloom_filter_ndv(value);
        self
    }

    /// Sets the max length of min/max value fields in the column index. Must be greater than 0.
    /// If set to `None` - there's no effective limit.
    pub fn set_column_index_truncate_length(mut self, max_length: Option<usize>) -> Self {
        if let Some(value) = max_length {
            assert!(value > 0, "Cannot have a 0 column index truncate length. If you wish to disable min/max value truncation, set it to `None`.");
        }

        self.column_index_truncate_length = max_length;
        self
    }

    /// Sets the max length of min/max value fields in statistics. Must be greater than 0.
    /// If set to `None` - there's no effective limit.
    pub fn set_statistics_truncate_length(mut self, max_length: Option<usize>) -> Self {
        if let Some(value) = max_length {
            assert!(value > 0, "Cannot have a 0 statistics truncate length. If you wish to disable min/max value truncation, set it to `None`.");
        }

        self.statistics_truncate_length = max_length;
        self
    }
}

/// Controls the level of statistics to be computed by the writer
#[derive(Debug, Clone, Copy, Eq, PartialEq)]
pub enum EnabledStatistics {
    /// Compute no statistics
    None,
    /// Compute chunk-level statistics but not page-level
    Chunk,
    /// Compute page-level and chunk-level statistics
    Page,
}

impl FromStr for EnabledStatistics {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "NONE" | "none" => Ok(EnabledStatistics::None),
            "CHUNK" | "chunk" => Ok(EnabledStatistics::Chunk),
            "PAGE" | "page" => Ok(EnabledStatistics::Page),
            _ => Err(format!("Invalid statistics arg: {}", s)),
        }
    }
}

impl Default for EnabledStatistics {
    fn default() -> Self {
        DEFAULT_STATISTICS_ENABLED
    }
}

/// Controls the bloom filter to be computed by the writer.
#[derive(Debug, Clone, PartialEq)]
pub struct BloomFilterProperties {
    /// False positive probability, should be always between 0 and 1 exclusive. Defaults to [`DEFAULT_BLOOM_FILTER_FPP`].
    ///
    /// You should set this value by calling [`WriterPropertiesBuilder::set_bloom_filter_fpp`].
    ///
    /// The bloom filter data structure is a trade of between disk and memory space versus fpp, the
    /// smaller the fpp, the more memory and disk space is required, thus setting it to a reasonable value
    /// e.g. 0.1, 0.05, or 0.001 is recommended.
    ///
    /// Setting to very small number diminishes the value of the filter itself, as the bitset size is
    /// even larger than just storing the whole value. You are also expected to set `ndv` if it can
    /// be known in advance in order to largely reduce space usage.
    pub fpp: f64,
    /// Number of distinct values, should be non-negative to be meaningful. Defaults to [`DEFAULT_BLOOM_FILTER_NDV`].
    ///
    /// You should set this value by calling [`WriterPropertiesBuilder::set_bloom_filter_ndv`].
    ///
    /// Usage of bloom filter is most beneficial for columns with large cardinality, so a good heuristic
    /// is to set ndv to number of rows. However it can reduce disk size if you know in advance a smaller
    /// number of distinct values. For very small ndv value it is probably not worth it to use bloom filter
    /// anyway.
    ///
    /// Increasing this value (without increasing fpp) will result in an increase in disk or memory size.
    pub ndv: u64,
}

impl Default for BloomFilterProperties {
    fn default() -> Self {
        BloomFilterProperties {
            fpp: DEFAULT_BLOOM_FILTER_FPP,
            ndv: DEFAULT_BLOOM_FILTER_NDV,
        }
    }
}

/// Container for column properties that can be changed as part of writer.
///
/// If a field is `None`, it means that no specific value has been set for this column,
/// so some subsequent or default value must be used.
#[derive(Debug, Clone, Default, PartialEq)]
struct ColumnProperties {
    encoding: Option<Encoding>,
    codec: Option<Compression>,
    dictionary_enabled: Option<bool>,
    statistics_enabled: Option<EnabledStatistics>,
    max_statistics_size: Option<usize>,
    /// bloom filter related properties
    bloom_filter_properties: Option<BloomFilterProperties>,
}

impl ColumnProperties {
    /// Sets encoding for this column.
    ///
    /// If dictionary is not enabled, this is treated as a primary encoding for a column.
    /// In case when dictionary is enabled for a column, this value is considered to
    /// be a fallback encoding.
    ///
    /// Panics if user tries to set dictionary encoding here, regardless of dictionary
    /// encoding flag being set. Use `set_dictionary_enabled` method to enable dictionary
    /// for a column.
    fn set_encoding(&mut self, value: Encoding) {
        if value == Encoding::PLAIN_DICTIONARY || value == Encoding::RLE_DICTIONARY {
            panic!("Dictionary encoding can not be used as fallback encoding");
        }
        self.encoding = Some(value);
    }

    /// Sets compression codec for this column.
    fn set_compression(&mut self, value: Compression) {
        self.codec = Some(value);
    }

    /// Sets whether or not dictionary encoding is enabled for this column.
    fn set_dictionary_enabled(&mut self, enabled: bool) {
        self.dictionary_enabled = Some(enabled);
    }

    /// Sets whether or not statistics are enabled for this column.
    fn set_statistics_enabled(&mut self, enabled: EnabledStatistics) {
        self.statistics_enabled = Some(enabled);
    }

    /// Sets max size for statistics for this column.
    fn set_max_statistics_size(&mut self, value: usize) {
        self.max_statistics_size = Some(value);
    }

    /// If `value` is `true`, sets bloom filter properties to default values if not previously set,
    /// otherwise it is a no-op.
    /// If `value` is `false`, resets bloom filter properties to `None`.
    fn set_bloom_filter_enabled(&mut self, value: bool) {
        if value && self.bloom_filter_properties.is_none() {
            self.bloom_filter_properties = Some(Default::default())
        } else if !value {
            self.bloom_filter_properties = None
        }
    }

    /// Sets the false positive probability for bloom filter for this column, and implicitly enables
    /// bloom filter if not previously enabled.
    ///
    /// # Panics
    ///
    /// Panics if the `value` is not between 0 and 1 exclusive
    fn set_bloom_filter_fpp(&mut self, value: f64) {
        assert!(
            value > 0. && value < 1.0,
            "fpp must be between 0 and 1 exclusive, got {value}"
        );

        self.bloom_filter_properties
            .get_or_insert_with(Default::default)
            .fpp = value;
    }

    /// Sets the number of distinct (unique) values for bloom filter for this column, and implicitly
    /// enables bloom filter if not previously enabled.
    fn set_bloom_filter_ndv(&mut self, value: u64) {
        self.bloom_filter_properties
            .get_or_insert_with(Default::default)
            .ndv = value;
    }

    /// Returns optional encoding for this column.
    fn encoding(&self) -> Option<Encoding> {
        self.encoding
    }

    /// Returns optional compression codec for this column.
    fn compression(&self) -> Option<Compression> {
        self.codec
    }

    /// Returns `Some(true)` if dictionary encoding is enabled for this column, if
    /// disabled then returns `Some(false)`. If result is `None`, then no setting has
    /// been provided.
    fn dictionary_enabled(&self) -> Option<bool> {
        self.dictionary_enabled
    }

    /// Returns `Some(true)` if statistics are enabled for this column, if disabled then
    /// returns `Some(false)`. If result is `None`, then no setting has been provided.
    fn statistics_enabled(&self) -> Option<EnabledStatistics> {
        self.statistics_enabled
    }

    /// Returns optional max size in bytes for statistics.
    fn max_statistics_size(&self) -> Option<usize> {
        self.max_statistics_size
    }

    /// Returns the bloom filter properties, or `None` if not enabled
    fn bloom_filter_properties(&self) -> Option<&BloomFilterProperties> {
        self.bloom_filter_properties.as_ref()
    }
}

/// Reference counted reader properties.
pub type ReaderPropertiesPtr = Arc<ReaderProperties>;

const DEFAULT_READ_BLOOM_FILTER: bool = false;

/// Configuration settings for reading parquet files.
///
/// All properties are immutable and `Send` + `Sync`.
/// Use [`ReaderPropertiesBuilder`] to assemble these properties.
///
/// # Example
///
/// ```rust
/// use parquet::file::properties::ReaderProperties;
///
/// // Create properties with default configuration.
/// let props = ReaderProperties::builder().build();
///
/// // Use properties builder to set certain options and assemble the configuration.
/// let props = ReaderProperties::builder()
///     .set_backward_compatible_lz4(false)
///     .build();
/// ```
pub struct ReaderProperties {
    codec_options: CodecOptions,
    read_bloom_filter: bool,
}

impl ReaderProperties {
    /// Returns builder for reader properties with default values.
    pub fn builder() -> ReaderPropertiesBuilder {
        ReaderPropertiesBuilder::with_defaults()
    }

    /// Returns codec options.
    pub(crate) fn codec_options(&self) -> &CodecOptions {
        &self.codec_options
    }

    /// Returns whether to read bloom filter
    pub(crate) fn read_bloom_filter(&self) -> bool {
        self.read_bloom_filter
    }
}

/// Builder for parquet file reader configuration. See example on
/// [`ReaderProperties`]
pub struct ReaderPropertiesBuilder {
    codec_options_builder: CodecOptionsBuilder,
    read_bloom_filter: Option<bool>,
}

/// Reader properties builder.
impl ReaderPropertiesBuilder {
    /// Returns default state of the builder.
    fn with_defaults() -> Self {
        Self {
            codec_options_builder: CodecOptionsBuilder::default(),
            read_bloom_filter: None,
        }
    }

    /// Finalizes the configuration and returns immutable reader properties struct.
    pub fn build(self) -> ReaderProperties {
        ReaderProperties {
            codec_options: self.codec_options_builder.build(),
            read_bloom_filter: self.read_bloom_filter.unwrap_or(DEFAULT_READ_BLOOM_FILTER),
        }
    }

    /// Enable/disable backward compatible LZ4.
    ///
    /// If backward compatible LZ4 is enable, on LZ4_HADOOP error it will fallback
    /// to the older versions LZ4 algorithms. That is LZ4_FRAME, for backward compatibility
    /// with files generated by older versions of this library, and LZ4_RAW, for backward
    /// compatibility with files generated by older versions of parquet-cpp.
    ///
    /// If backward compatible LZ4 is disabled, on LZ4_HADOOP error it will return the error.
    pub fn set_backward_compatible_lz4(mut self, value: bool) -> Self {
        self.codec_options_builder = self
            .codec_options_builder
            .set_backward_compatible_lz4(value);
        self
    }

    /// Enable/disable reading bloom filter
    ///
    /// If reading bloom filter is enabled, bloom filter will be read from the file.
    /// If reading bloom filter is disabled, bloom filter will not be read from the file.
    ///
    /// By default bloom filter is set to be read.
    pub fn set_read_bloom_filter(mut self, value: bool) -> Self {
        self.read_bloom_filter = Some(value);
        self
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_writer_version() {
        assert_eq!(WriterVersion::PARQUET_1_0.as_num(), 1);
        assert_eq!(WriterVersion::PARQUET_2_0.as_num(), 2);
    }

    #[test]
    fn test_writer_properties_default_settings() {
        let props = WriterProperties::default();
        assert_eq!(props.data_page_size_limit(), DEFAULT_PAGE_SIZE);
        assert_eq!(
            props.dictionary_page_size_limit(),
            DEFAULT_DICTIONARY_PAGE_SIZE_LIMIT
        );
        assert_eq!(props.write_batch_size(), DEFAULT_WRITE_BATCH_SIZE);
        assert_eq!(props.max_row_group_size(), DEFAULT_MAX_ROW_GROUP_SIZE);
        assert_eq!(props.writer_version(), DEFAULT_WRITER_VERSION);
        assert_eq!(props.created_by(), DEFAULT_CREATED_BY);
        assert_eq!(props.key_value_metadata(), None);
        assert_eq!(props.encoding(&ColumnPath::from("col")), None);
        assert_eq!(
            props.compression(&ColumnPath::from("col")),
            DEFAULT_COMPRESSION
        );
        assert_eq!(
            props.dictionary_enabled(&ColumnPath::from("col")),
            DEFAULT_DICTIONARY_ENABLED
        );
        assert_eq!(
            props.statistics_enabled(&ColumnPath::from("col")),
            DEFAULT_STATISTICS_ENABLED
        );
        assert_eq!(
            props.max_statistics_size(&ColumnPath::from("col")),
            DEFAULT_MAX_STATISTICS_SIZE
        );
        assert!(props
            .bloom_filter_properties(&ColumnPath::from("col"))
            .is_none());
    }

    #[test]
    fn test_writer_properties_dictionary_encoding() {
        // dictionary encoding is not configurable, and it should be the same for both
        // writer version 1 and 2.
        for version in &[WriterVersion::PARQUET_1_0, WriterVersion::PARQUET_2_0] {
            let props = WriterProperties::builder()
                .set_writer_version(*version)
                .build();
            assert_eq!(props.dictionary_page_encoding(), Encoding::PLAIN);
            assert_eq!(
                props.dictionary_data_page_encoding(),
                Encoding::RLE_DICTIONARY
            );
        }
    }

    #[test]
    #[should_panic(expected = "Dictionary encoding can not be used as fallback encoding")]
    fn test_writer_properties_panic_when_plain_dictionary_is_fallback() {
        // Should panic when user specifies dictionary encoding as fallback encoding.
        WriterProperties::builder()
            .set_encoding(Encoding::PLAIN_DICTIONARY)
            .build();
    }

    #[test]
    #[should_panic(expected = "Dictionary encoding can not be used as fallback encoding")]
    fn test_writer_properties_panic_when_rle_dictionary_is_fallback() {
        // Should panic when user specifies dictionary encoding as fallback encoding.
        WriterProperties::builder()
            .set_encoding(Encoding::RLE_DICTIONARY)
            .build();
    }

    #[test]
    #[should_panic(expected = "Dictionary encoding can not be used as fallback encoding")]
    fn test_writer_properties_panic_when_dictionary_is_enabled() {
        WriterProperties::builder()
            .set_dictionary_enabled(true)
            .set_column_encoding(ColumnPath::from("col"), Encoding::RLE_DICTIONARY)
            .build();
    }

    #[test]
    #[should_panic(expected = "Dictionary encoding can not be used as fallback encoding")]
    fn test_writer_properties_panic_when_dictionary_is_disabled() {
        WriterProperties::builder()
            .set_dictionary_enabled(false)
            .set_column_encoding(ColumnPath::from("col"), Encoding::RLE_DICTIONARY)
            .build();
    }

    #[test]
    fn test_writer_properties_builder() {
        let props = WriterProperties::builder()
            // file settings
            .set_writer_version(WriterVersion::PARQUET_2_0)
            .set_data_page_size_limit(10)
            .set_dictionary_page_size_limit(20)
            .set_write_batch_size(30)
            .set_max_row_group_size(40)
            .set_created_by("default".to_owned())
            .set_key_value_metadata(Some(vec![KeyValue::new(
                "key".to_string(),
                "value".to_string(),
            )]))
            // global column settings
            .set_encoding(Encoding::DELTA_BINARY_PACKED)
            .set_compression(Compression::GZIP(Default::default()))
            .set_dictionary_enabled(false)
            .set_statistics_enabled(EnabledStatistics::None)
            .set_max_statistics_size(50)
            // specific column settings
            .set_column_encoding(ColumnPath::from("col"), Encoding::RLE)
            .set_column_compression(ColumnPath::from("col"), Compression::SNAPPY)
            .set_column_dictionary_enabled(ColumnPath::from("col"), true)
            .set_column_statistics_enabled(ColumnPath::from("col"), EnabledStatistics::Chunk)
            .set_column_max_statistics_size(ColumnPath::from("col"), 123)
            .set_column_bloom_filter_enabled(ColumnPath::from("col"), true)
            .set_column_bloom_filter_ndv(ColumnPath::from("col"), 100_u64)
            .set_column_bloom_filter_fpp(ColumnPath::from("col"), 0.1)
            .build();

        assert_eq!(props.writer_version(), WriterVersion::PARQUET_2_0);
        assert_eq!(props.data_page_size_limit(), 10);
        assert_eq!(props.dictionary_page_size_limit(), 20);
        assert_eq!(props.write_batch_size(), 30);
        assert_eq!(props.max_row_group_size(), 40);
        assert_eq!(props.created_by(), "default");
        assert_eq!(
            props.key_value_metadata(),
            Some(&vec![
                KeyValue::new("key".to_string(), "value".to_string(),)
            ])
        );

        assert_eq!(
            props.encoding(&ColumnPath::from("a")),
            Some(Encoding::DELTA_BINARY_PACKED)
        );
        assert_eq!(
            props.compression(&ColumnPath::from("a")),
            Compression::GZIP(Default::default())
        );
        assert!(!props.dictionary_enabled(&ColumnPath::from("a")));
        assert_eq!(
            props.statistics_enabled(&ColumnPath::from("a")),
            EnabledStatistics::None
        );
        assert_eq!(props.max_statistics_size(&ColumnPath::from("a")), 50);

        assert_eq!(
            props.encoding(&ColumnPath::from("col")),
            Some(Encoding::RLE)
        );
        assert_eq!(
            props.compression(&ColumnPath::from("col")),
            Compression::SNAPPY
        );
        assert!(props.dictionary_enabled(&ColumnPath::from("col")));
        assert_eq!(
            props.statistics_enabled(&ColumnPath::from("col")),
            EnabledStatistics::Chunk
        );
        assert_eq!(props.max_statistics_size(&ColumnPath::from("col")), 123);
        assert_eq!(
            props.bloom_filter_properties(&ColumnPath::from("col")),
            Some(&BloomFilterProperties { fpp: 0.1, ndv: 100 })
        );
    }

    #[test]
    fn test_writer_properties_builder_partial_defaults() {
        let props = WriterProperties::builder()
            .set_encoding(Encoding::DELTA_BINARY_PACKED)
            .set_compression(Compression::GZIP(Default::default()))
            .set_bloom_filter_enabled(true)
            .set_column_encoding(ColumnPath::from("col"), Encoding::RLE)
            .build();

        assert_eq!(
            props.encoding(&ColumnPath::from("col")),
            Some(Encoding::RLE)
        );
        assert_eq!(
            props.compression(&ColumnPath::from("col")),
            Compression::GZIP(Default::default())
        );
        assert_eq!(
            props.dictionary_enabled(&ColumnPath::from("col")),
            DEFAULT_DICTIONARY_ENABLED
        );
        assert_eq!(
            props.bloom_filter_properties(&ColumnPath::from("col")),
            Some(&BloomFilterProperties {
                fpp: 0.05,
                ndv: 1_000_000_u64
            })
        );
    }

    #[test]
    fn test_writer_properties_bloom_filter_ndv_fpp_set() {
        assert_eq!(
            WriterProperties::builder()
                .build()
                .bloom_filter_properties(&ColumnPath::from("col")),
            None
        );
        assert_eq!(
            WriterProperties::builder()
                .set_bloom_filter_ndv(100)
                .build()
                .bloom_filter_properties(&ColumnPath::from("col")),
            Some(&BloomFilterProperties {
                fpp: 0.05,
                ndv: 100
            })
        );
        assert_eq!(
            WriterProperties::builder()
                .set_bloom_filter_fpp(0.1)
                .build()
                .bloom_filter_properties(&ColumnPath::from("col")),
            Some(&BloomFilterProperties {
                fpp: 0.1,
                ndv: 1_000_000_u64
            })
        );
    }

    #[test]
    fn test_reader_properties_default_settings() {
        let props = ReaderProperties::builder().build();

        let codec_options = CodecOptionsBuilder::default()
            .set_backward_compatible_lz4(true)
            .build();

        assert_eq!(props.codec_options(), &codec_options);
        assert!(!props.read_bloom_filter());
    }

    #[test]
    fn test_reader_properties_builder() {
        let props = ReaderProperties::builder()
            .set_backward_compatible_lz4(false)
            .build();

        let codec_options = CodecOptionsBuilder::default()
            .set_backward_compatible_lz4(false)
            .build();

        assert_eq!(props.codec_options(), &codec_options);
    }

    #[test]
    fn test_parse_writerversion() {
        let mut writer_version = "PARQUET_1_0".parse::<WriterVersion>().unwrap();
        assert_eq!(writer_version, WriterVersion::PARQUET_1_0);
        writer_version = "PARQUET_2_0".parse::<WriterVersion>().unwrap();
        assert_eq!(writer_version, WriterVersion::PARQUET_2_0);

        // test lowercase
        writer_version = "parquet_1_0".parse::<WriterVersion>().unwrap();
        assert_eq!(writer_version, WriterVersion::PARQUET_1_0);

        // test invalid version
        match "PARQUET_-1_0".parse::<WriterVersion>() {
            Ok(_) => panic!("Should not be able to parse PARQUET_-1_0"),
            Err(e) => {
                assert_eq!(e, "Invalid writer version: PARQUET_-1_0");
            }
        }
    }

    #[test]
    fn test_parse_enabledstatistics() {
        let mut enabled_statistics = "NONE".parse::<EnabledStatistics>().unwrap();
        assert_eq!(enabled_statistics, EnabledStatistics::None);
        enabled_statistics = "CHUNK".parse::<EnabledStatistics>().unwrap();
        assert_eq!(enabled_statistics, EnabledStatistics::Chunk);
        enabled_statistics = "PAGE".parse::<EnabledStatistics>().unwrap();
        assert_eq!(enabled_statistics, EnabledStatistics::Page);

        // test lowercase
        enabled_statistics = "none".parse::<EnabledStatistics>().unwrap();
        assert_eq!(enabled_statistics, EnabledStatistics::None);

        //test invalid statistics
        match "ChunkAndPage".parse::<EnabledStatistics>() {
            Ok(_) => panic!("Should not be able to parse ChunkAndPage"),
            Err(e) => {
                assert_eq!(e, "Invalid statistics arg: ChunkAndPage");
            }
        }
    }
}