org.apache.druid.segment.column

Class StringUtf8DictionaryEncodedColumn

java.lang.Object

org.apache.druid.segment.column.StringUtf8DictionaryEncodedColumn

All Implemented Interfaces:

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

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

DictionaryEncodedColumn 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 and 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 and Description
StringUtf8DictionaryEncodedColumn(ColumnarInts singleValueColumn, ColumnarMultiInts multiValueColumn, Indexed<ByteBuffer> utf8Dictionary)

Method Summary

Modifier and Type	Method and Description
void	close()
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.DictionaryEncodedColumn

makeColumnValueSelector

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

getArrayDictionary, getDoubleDictionary, getFieldTypeInfo, getLongDictionary

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

makeVectorValueSelector

Constructor Detail

StringUtf8DictionaryEncodedColumn

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

Method Detail

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>

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

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Throws:

IOException

getLogicalType

public ColumnType getLogicalType()

Specified by:

getLogicalType in interface NestedCommonFormatColumn

getStringDictionary

public Indexed<String> getStringDictionary()

Specified by:

getStringDictionary in interface NestedCommonFormatColumn