org.apache.druid.segment

Class StringDimensionDictionary

java.lang.Object

org.apache.druid.segment.DimensionDictionary<String>

org.apache.druid.segment.StringDimensionDictionary

public class StringDimensionDictionary
extends DimensionDictionary<String>

DimensionDictionary for String dimension values.

Field Summary

Fields inherited from class org.apache.druid.segment.DimensionDictionary

ABSENT_VALUE_ID

Constructor Summary

Constructors

Constructor and Description
StringDimensionDictionary(boolean computeOnHeapSize) Creates a StringDimensionDictionary.

Method Summary

Modifier and Type	Method and Description
boolean	computeOnHeapSize() Whether on-heap size of this dictionary should be computed.
long	estimateSizeOfValue(String value) Estimates the size of the dimension value in bytes.

Methods inherited from class org.apache.druid.segment.DimensionDictionary

add, getId, getIdForNull, getMaxValue, getMinValue, getValue, getValues, size, sizeInBytes, sort

Methods inherited from class java.lang.Object

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

Constructor Detail

StringDimensionDictionary

public StringDimensionDictionary(boolean computeOnHeapSize)

Creates a StringDimensionDictionary.

Parameters:

computeOnHeapSize - true if on-heap memory estimation of the dictionary size should be enabled, false otherwise

Method Detail

estimateSizeOfValue

public long estimateSizeOfValue(String value)

Description copied from class: DimensionDictionary

Estimates the size of the dimension value in bytes.

This method is called when adding a new dimension value to the lookup only if DimensionDictionary.computeOnHeapSize() returns true.

Specified by:

estimateSizeOfValue in class DimensionDictionary<String>

computeOnHeapSize

public boolean computeOnHeapSize()

Description copied from class: DimensionDictionary

Whether on-heap size of this dictionary should be computed.

Specified by:

computeOnHeapSize in class DimensionDictionary<String>