org.apache.druid.segment

Class ComparatorDimensionDictionary<T>

java.lang.Object

org.apache.druid.segment.ComparatorDimensionDictionary<T>

public class ComparatorDimensionDictionary<T>
extends Object

Comparator based DimensionDictionary there are a lot of unused methods in here for now since the only thing this is used for is to build up the unsorted dictionary and then it is converted to a ComparatorSortedDimensionDictionary, but leaving the unused methods in place for now to be basically compatible with the other implementation. This version is not thread-safe since the only current user doesn't use the dictionary for realtime queries, if this changes we need to add a 'ConcurrentComparatorDimensionDictionary'.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ABSENT_VALUE_ID

Constructor Summary

Constructors

Constructor and Description
ComparatorDimensionDictionary(Comparator<T> comparator)

Method Summary

Modifier and Type	Method and Description
int	add(T originalValue)
long	estimateSizeOfValue(T value) Estimates the size of the dimension value in bytes.
int	getId(T value)
int	getIdForNull()
T	getMaxValue()
T	getMinValue()
T	getValue(int id)
int	size()
long	sizeInBytes() Gets the current size of this dictionary in bytes.
ComparatorSortedDimensionDictionary<T>	sort()

Methods inherited from class java.lang.Object

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

Field Detail

ABSENT_VALUE_ID

public static final int ABSENT_VALUE_ID

See Also:

Constant Field Values

Constructor Detail

ComparatorDimensionDictionary

public ComparatorDimensionDictionary(Comparator<T> comparator)

Method Detail

getId

public int getId(@Nullable
                 T value)

getValue

@Nullable
public T getValue(int id)

size

public int size()

sizeInBytes

public long sizeInBytes()

Gets the current size of this dictionary in bytes.

Throws:

IllegalStateException - if size computation is disabled.

add

public int add(@Nullable
               T originalValue)

getMinValue

public T getMinValue()

getMaxValue

public T getMaxValue()

getIdForNull

public int getIdForNull()

sort

public ComparatorSortedDimensionDictionary<T> sort()

estimateSizeOfValue

public long estimateSizeOfValue(T value)

Estimates the size of the dimension value in bytes. This method is called only when a new dimension value is being added to the lookup.

Throws:

UnsupportedOperationException - Implementations that want to estimate memory must override this method.