public void Array_of_booleans_writes_and_reads()
{
var bools = new List <bool>();
bools.AddRange(new[] { true, false, true });
var schema = new SchemaElement <bool>("bool");
_writer.Write(_bw, schema, bools, out IList extra);
_ms.Position = 0;
var boolsRead = new List <bool?>();
_reader.Read(_br, schema, boolsRead, 3);
Assert.Equal(bools, boolsRead.Cast <bool>().ToList());
}
private void WriteValues(SchemaElement schema, IList values, Thrift.PageHeader ph, CompressionMethod compression, ColumnStats stats)
{
byte[] data;
using (var ms = new MemoryStream())
{
using (var writer = new BinaryWriter(ms))
{
if (stats.NullCount > 0)
{
CreateDefinitions(values, schema, out IList newValues, out List <int> definitions);
values = newValues;
_rleWriter.Write(writer, schema, definitions);
}
_plainWriter.Write(writer, schema, values);
data = ms.ToArray();
}
}
ph.Uncompressed_page_size = data.Length;
if (compression != CompressionMethod.None)
{
IDataWriter writer = DataFactory.GetWriter(compression);
using (var ms = new MemoryStream())
{
writer.Write(data, ms);
data = ms.ToArray();
}
ph.Compressed_page_size = data.Length;
}
else
{
ph.Compressed_page_size = ph.Uncompressed_page_size;
}
_thrift.Write(ph);
_output.Write(data, 0, data.Length);
}
private List <PageTag> WriteValues(SchemaElement schema, IList values, Thrift.PageHeader ph, CompressionMethod compression)
{
var result = new List <PageTag>();
byte[] dictionaryPageBytes = null;
int dictionaryPageCount = 0;
byte[] dataPageBytes;
List <int> repetitions = null;
List <int> definitions = null;
//flatten values and create repetitions list if the field is repeatable
if (schema.MaxRepetitionLevel > 0)
{
var rpack = new RepetitionPack();
values = rpack.Unpack(_schema, values, out repetitions);
ph.Data_page_header.Num_values = values.Count;
}
if (schema.IsNullable || schema.MaxDefinitionLevel > 0)
{
var dpack = new DefinitionPack();
values = dpack.Unpack(values, _schema, out definitions);
}
using (var ms = new MemoryStream())
{
using (var writer = new BinaryWriter(ms))
{
//write repetitions
if (repetitions != null)
{
int bitWidth = PEncoding.GetWidthFromMaxInt(_schema.MaxRepetitionLevel);
RunLengthBitPackingHybridValuesWriter.Write(writer, bitWidth, repetitions);
}
//write definitions
if (definitions != null)
{
int bitWidth = PEncoding.GetWidthFromMaxInt(_schema.MaxDefinitionLevel);
RunLengthBitPackingHybridValuesWriter.Write(writer, bitWidth, definitions);
}
//write data
if (!_writerOptions.UseDictionaryEncoding || !_dicWriter.Write(writer, schema, values, out IList dicValues))
{
_plainWriter.Write(writer, schema, values, out IList plainExtra);
}
else
{
dictionaryPageCount = dicValues.Count;
ph.Data_page_header.Encoding = Thrift.Encoding.PLAIN_DICTIONARY;
using (var dms = new MemoryStream())
using (var dwriter = new BinaryWriter(dms))
{
_plainWriter.Write(dwriter, schema, dicValues, out IList t0);
dictionaryPageBytes = dms.ToArray();
}
}
dataPageBytes = ms.ToArray();
}
}
if (dictionaryPageBytes != null)
{
Thrift.PageHeader dph = _meta.CreateDictionaryPage(dictionaryPageCount);
dictionaryPageBytes = Compress(dph, dictionaryPageBytes, compression);
int dictionaryHeaderSize = Write(dph, dictionaryPageBytes);
result.Add(new PageTag {
HeaderSize = dictionaryHeaderSize, HeaderMeta = dph
});
}
dataPageBytes = Compress(ph, dataPageBytes, compression);
int dataHeaderSize = Write(ph, dataPageBytes);
result.Add(new PageTag {
HeaderSize = dataHeaderSize, HeaderMeta = ph
});
return(result);
}
private List <PageTag> WriteValues(SchemaElement schema, IList values, Thrift.PageHeader ph, CompressionMethod compression, ColumnStats stats)
{
var result = new List <PageTag>();
byte[] dictionaryPageBytes = null;
int dictionaryPageCount = 0;
byte[] dataPageBytes;
//flatten values if the field is repeatable
if (schema.IsRepeated)
{
values = FlattenRepeatables(values, schema);
}
using (var ms = new MemoryStream())
{
using (var writer = new BinaryWriter(ms))
{
//write repetitions
if (schema.IsRepeated)
{
List <int> repetitions = CreateRepetitions(values, schema);
_rleWriter.Write(writer, _definitionsSchema, repetitions, out IList nullExtra);
}
//write definitions
if (schema.HasNulls || schema.IsRepeated)
{
CreateDefinitions(values, schema, out IList newValues, out List <int> definitions);
values = newValues;
_rleWriter.Write(writer, _definitionsSchema, definitions, out IList nullExtra);
}
//write data
if (!_writerOptions.UseDictionaryEncoding || !_dicWriter.Write(writer, schema, values, out IList dicValues))
{
_plainWriter.Write(writer, schema, values, out IList plainExtra);
}
else
{
dictionaryPageCount = dicValues.Count;
ph.Data_page_header.Encoding = Thrift.Encoding.PLAIN_DICTIONARY;
using (var dms = new MemoryStream())
using (var dwriter = new BinaryWriter(dms))
{
_plainWriter.Write(dwriter, schema, dicValues, out IList t0);
dictionaryPageBytes = dms.ToArray();
}
}
dataPageBytes = ms.ToArray();
}
}
if (dictionaryPageBytes != null)
{
Thrift.PageHeader dph = _meta.CreateDictionaryPage(dictionaryPageCount);
dictionaryPageBytes = Compress(dph, dictionaryPageBytes, compression);
int dictionaryHeaderSize = Write(dph, dictionaryPageBytes);
result.Add(new PageTag {
HeaderSize = dictionaryHeaderSize, HeaderMeta = dph
});
}
dataPageBytes = Compress(ph, dataPageBytes, compression);
int dataHeaderSize = Write(ph, dataPageBytes);
result.Add(new PageTag {
HeaderSize = dataHeaderSize, HeaderMeta = ph
});
return(result);
}
