Package org.apache.druid.segment.nested

Class VariantColumn<TStringDictionary extends Indexed<ByteBuffer>>

java.lang.Object

org.apache.druid.segment.nested.VariantColumn<TStringDictionary>

All Implemented Interfaces:

Closeable, AutoCloseable, BaseColumn, DictionaryEncodedColumn<String>, SelectableColumn, NestedCommonFormatColumn

public class VariantColumn<TStringDictionary extends Indexed<ByteBuffer>>
extends Object
implements DictionaryEncodedColumn<String>, NestedCommonFormatColumn

NestedCommonFormatColumn for single type array columns, and mixed type columns. If variantTypes is non-null, the column is composed of all of the types defined there, otherwise all rows are consistently logicalType. If mixed type, logical type is set by ColumnType.leastRestrictiveType(org.apache.druid.segment.column.ColumnType, org.apache.druid.segment.column.ColumnType).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	VariantColumn.VariantVectorObjectSelector	Make a VectorObjectSelector for a dictionary encoded column that coerces mixed types to a common type

Nested classes/interfaces inherited from interface org.apache.druid.segment.nested.NestedCommonFormatColumn

NestedCommonFormatColumn.Format

Constructor Summary

Constructors

Constructor	Description
VariantColumn(TStringDictionary stringDictionary, FixedIndexed<Long> longDictionary, FixedIndexed<Double> doubleDictionary, FrontCodedIntArrayIndexed arrayDictionary, ColumnarInts encodedValueColumn, ImmutableBitmap nullValueBitmap, ColumnType logicalType, Byte variantTypeSetByte, BitmapFactory bitmapFactory)

Method Summary

Modifier and Type	Method	Description
<T> T	as(Class<T> clazz)	Request an implementation of a particular interface.
void	close()
Indexed<Object[]>	getArrayDictionary()
int	getCardinality()
Indexed<Double>	getDoubleDictionary()
SortedMap<String,FieldTypeInfo.MutableTypeSet>	getFieldTypeInfo()
ColumnType	getLogicalType()
Indexed<Long>	getLongDictionary()
IndexedInts	getMultiValueRow(int rowNum)
int	getSingleValueRow(int rowNum)
Indexed<String>	getStringDictionary()
boolean	hasMultipleValues()
int	length()
int	lookupId(String val)
it.unimi.dsi.fastutil.ints.IntSet	lookupIds(String val)
String	lookupName(int id)
ColumnValueSelector<?>	makeColumnValueSelector(ReadableOffset offset)
DimensionSelector	makeDimensionSelector(ReadableOffset offset, ExtractionFn extractionFn)
MultiValueDimensionVectorSelector	makeMultiValueDimensionVectorSelector(ReadableVectorOffset vectorOffset)
SingleValueDimensionVectorSelector	makeSingleValueDimensionVectorSelector(ReadableVectorOffset offset)
VectorObjectSelector	makeVectorObjectSelector(ReadableVectorOffset offset)
VectorValueSelector	makeVectorValueSelector(ReadableVectorOffset offset)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

VariantColumn

public VariantColumn(TStringDictionary stringDictionary,
 FixedIndexed<Long> longDictionary,
 FixedIndexed<Double> doubleDictionary,
 FrontCodedIntArrayIndexed arrayDictionary,
 ColumnarInts encodedValueColumn,
 ImmutableBitmap nullValueBitmap,
 ColumnType logicalType,
 @Nullable
 Byte variantTypeSetByte,
 BitmapFactory bitmapFactory)

Method Details

getLogicalType

public ColumnType getLogicalType()

Specified by:

getLogicalType in interface NestedCommonFormatColumn

getStringDictionary

public Indexed<String> getStringDictionary()

Specified by:

getStringDictionary in interface NestedCommonFormatColumn

getLongDictionary

public Indexed<Long> getLongDictionary()

Specified by:

getLongDictionary in interface NestedCommonFormatColumn

getDoubleDictionary

public Indexed<Double> getDoubleDictionary()

Specified by:

getDoubleDictionary in interface NestedCommonFormatColumn

getArrayDictionary

public Indexed<Object[]> getArrayDictionary()

Specified by:

getArrayDictionary in interface NestedCommonFormatColumn

getFieldTypeInfo

public SortedMap<String,FieldTypeInfo.MutableTypeSet> getFieldTypeInfo()

Specified by:

getFieldTypeInfo in interface NestedCommonFormatColumn

length

public int length()

Specified by:

length in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

hasMultipleValues

public boolean hasMultipleValues()

Specified by:

hasMultipleValues in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

getSingleValueRow

public int getSingleValueRow(int rowNum)

Specified by:

getSingleValueRow in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

getMultiValueRow

public IndexedInts getMultiValueRow(int rowNum)

Specified by:

getMultiValueRow in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

lookupName

@Nullable
public String lookupName(int id)

Specified by:

lookupName in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

lookupId

public int lookupId(String val)

Specified by:

lookupId in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

lookupIds

public it.unimi.dsi.fastutil.ints.IntSet lookupIds(String val)

getCardinality

public int getCardinality()

Specified by:

getCardinality in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

makeDimensionSelector

public DimensionSelector makeDimensionSelector(ReadableOffset offset,
 @Nullable
 ExtractionFn extractionFn)

Specified by:

makeDimensionSelector in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

makeColumnValueSelector

public ColumnValueSelector<?> makeColumnValueSelector(ReadableOffset offset)

Specified by:

makeColumnValueSelector in interface BaseColumn

Specified by:

makeColumnValueSelector in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

makeSingleValueDimensionVectorSelector

public SingleValueDimensionVectorSelector makeSingleValueDimensionVectorSelector(ReadableVectorOffset offset)

Specified by:

makeSingleValueDimensionVectorSelector in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

makeMultiValueDimensionVectorSelector

public MultiValueDimensionVectorSelector makeMultiValueDimensionVectorSelector(ReadableVectorOffset vectorOffset)

Specified by:

makeMultiValueDimensionVectorSelector in interface DictionaryEncodedColumn<TStringDictionary extends Indexed<ByteBuffer>>

makeVectorValueSelector

public VectorValueSelector makeVectorValueSelector(ReadableVectorOffset offset)

Specified by:

makeVectorValueSelector in interface BaseColumn

makeVectorObjectSelector

public VectorObjectSelector makeVectorObjectSelector(ReadableVectorOffset offset)

Specified by:

makeVectorObjectSelector in interface BaseColumn

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException

as

@Nullable
public <T> T as(Class<T> clazz)

Description copied from interface: SelectableColumn

Request an implementation of a particular interface. Physical nested columns, and virtual columns that act as a nested column, should implement:

• NestedColumnTypeInspector, required.
• NestedColumnSelectorFactory, required.
• NestedVectorColumnSelectorFactory, required.
• NestedColumnIndexSupplier, if the column has indexes.

Specified by:

as in interface SelectableColumn

Type Parameters:

T - desired interface

Parameters:

clazz - desired interface

Returns:

instance of clazz, or null if the interface is not supported by this segment