Package org.apache.druid.segment.column

Class StringUtf8DictionaryEncodedColumn

java.lang.Object

org.apache.druid.segment.column.StringUtf8DictionaryEncodedColumn

All Implemented Interfaces:

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

public class StringUtf8DictionaryEncodedColumn
extends Object
implements DictionaryEncodedColumn<String>, NestedCommonFormatColumn

DictionaryEncodedColumn<String> for a column which has a ByteBuffer based UTF-8 dictionary.

Implements NestedCommonFormatColumn so it can be used as a reader for single value string specializations of AutoTypeColumnIndexer.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	StringUtf8DictionaryEncodedColumn.MultiValueStringVectorObjectSelector	Base type for a VectorObjectSelector for a dictionary encoded ColumnType.STRING built around a ColumnarMultiInts.
static class	StringUtf8DictionaryEncodedColumn.StringMultiValueDimensionVectorSelector	Base type for a MultiValueDimensionVectorSelector for a dictionary encoded ColumnType.STRING built around a ColumnarMultiInts.
static class	StringUtf8DictionaryEncodedColumn.StringSingleValueDimensionVectorSelector	Base type for a SingleValueDimensionVectorSelector for a dictionary encoded ColumnType.STRING built around a ColumnarInts.
static class	StringUtf8DictionaryEncodedColumn.StringVectorObjectSelector	Base type for a VectorObjectSelector for a dictionary encoded ColumnType.STRING built around a ColumnarInts.

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

NestedCommonFormatColumn.Format

Constructor Summary

Constructors

Constructor	Description
StringUtf8DictionaryEncodedColumn(ColumnarInts singleValueColumn, ColumnarMultiInts multiValueColumn, Indexed<ByteBuffer> utf8Dictionary, BitmapFactory bitmapFactory)

Method Summary

Modifier and Type	Method	Description
<T> T	as(Class<T> clazz)	Request an implementation of a particular interface.
void	close()
BitmapFactory	getBitmapFactory()
int	getCardinality()
ColumnType	getLogicalType()
IndexedInts	getMultiValueRow(int rowNum)
int	getSingleValueRow(int rowNum)
Indexed<String>	getStringDictionary()
boolean	hasMultipleValues()
int	length()
int	lookupId(String name)
String	lookupName(int id)
HistoricalDimensionSelector	makeDimensionSelector(ReadableOffset offset, ExtractionFn extractionFn)
MultiValueDimensionVectorSelector	makeMultiValueDimensionVectorSelector(ReadableVectorOffset offset)
SingleValueDimensionVectorSelector	makeSingleValueDimensionVectorSelector(ReadableVectorOffset offset)
VectorObjectSelector	makeVectorObjectSelector(ReadableVectorOffset offset)

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.segment.column.BaseColumn

makeVectorValueSelector

Methods inherited from interface org.apache.druid.segment.column.DictionaryEncodedColumn

makeColumnValueSelector

Methods inherited from interface org.apache.druid.segment.nested.NestedCommonFormatColumn

getArrayDictionary, getDoubleDictionary, getFieldTypeInfo, getLongDictionary

Constructor Details

StringUtf8DictionaryEncodedColumn

public StringUtf8DictionaryEncodedColumn(@Nullable
 ColumnarInts singleValueColumn,
 @Nullable
 ColumnarMultiInts multiValueColumn,
 Indexed<ByteBuffer> utf8Dictionary,
 BitmapFactory bitmapFactory)

Method Details

length

public int length()

Specified by:

length in interface DictionaryEncodedColumn<String>

hasMultipleValues

public boolean hasMultipleValues()

Specified by:

hasMultipleValues in interface DictionaryEncodedColumn<String>

getSingleValueRow

public int getSingleValueRow(int rowNum)

Specified by:

getSingleValueRow in interface DictionaryEncodedColumn<String>

getMultiValueRow

public IndexedInts getMultiValueRow(int rowNum)

Specified by:

getMultiValueRow in interface DictionaryEncodedColumn<String>

lookupName

@Nullable
public String lookupName(int id)

Specified by:

lookupName in interface DictionaryEncodedColumn<String>

lookupId

public int lookupId(String name)

Specified by:

lookupId in interface DictionaryEncodedColumn<String>

getCardinality

public int getCardinality()

Specified by:

getCardinality in interface DictionaryEncodedColumn<String>

getBitmapFactory

public BitmapFactory getBitmapFactory()

makeDimensionSelector

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

Specified by:

makeDimensionSelector in interface DictionaryEncodedColumn<String>

makeSingleValueDimensionVectorSelector

public SingleValueDimensionVectorSelector makeSingleValueDimensionVectorSelector(ReadableVectorOffset offset)

Specified by:

makeSingleValueDimensionVectorSelector in interface DictionaryEncodedColumn<String>

makeMultiValueDimensionVectorSelector

public MultiValueDimensionVectorSelector makeMultiValueDimensionVectorSelector(ReadableVectorOffset offset)

Specified by:

makeMultiValueDimensionVectorSelector in interface DictionaryEncodedColumn<String>

makeVectorObjectSelector

public VectorObjectSelector makeVectorObjectSelector(ReadableVectorOffset offset)

Specified by:

makeVectorObjectSelector in interface BaseColumn

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

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException

getLogicalType

public ColumnType getLogicalType()

Specified by:

getLogicalType in interface NestedCommonFormatColumn

getStringDictionary

public Indexed<String> getStringDictionary()

Specified by:

getStringDictionary in interface NestedCommonFormatColumn