org.apache.druid.segment.column

Class ObjectStrategyComplexTypeStrategy<T>

java.lang.Object

org.apache.druid.segment.column.ObjectStrategyComplexTypeStrategy<T>

All Implemented Interfaces:

Comparator<T>, TypeStrategy<T>

public class ObjectStrategyComplexTypeStrategy<T>
extends Object
implements TypeStrategy<T>

Default implementation of TypeStrategy for all ComplexMetricSerde implementations that just wraps the ObjectStrategy they are required to implement. This is not likely to be the most efficient way to do things, especially since writing must first produce a byte array before it can be written to the buffer, but it is cheap and should work correctly, which is important.

Constructor Summary

Constructors

Constructor and Description
ObjectStrategyComplexTypeStrategy(ObjectStrategy<T> objectStrategy, TypeSignature<?> signature)

Method Summary

Modifier and Type	Method and Description
int	compare(T o1, T o2)
int	estimateSizeBytes(T value)
T	fromBytes(byte[] value)
T	read(ByteBuffer buffer)
boolean	readRetainsBufferReference()
int	write(ByteBuffer buffer, T value, int maxSizeBytes)

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.TypeStrategy

read, write

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, equals, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Constructor Detail

ObjectStrategyComplexTypeStrategy

public ObjectStrategyComplexTypeStrategy(ObjectStrategy<T> objectStrategy,
                                         TypeSignature<?> signature)

Method Detail

estimateSizeBytes

public int estimateSizeBytes(@Nullable
                             T value)

Specified by:

estimateSizeBytes in interface TypeStrategy<T>

read

public T read(ByteBuffer buffer)

Specified by:

read in interface TypeStrategy<T>

readRetainsBufferReference

public boolean readRetainsBufferReference()

Specified by:

readRetainsBufferReference in interface TypeStrategy<T>

write

public int write(ByteBuffer buffer,
                 T value,
                 int maxSizeBytes)

Specified by:

write in interface TypeStrategy<T>

compare

public int compare(T o1,
                   T o2)

Specified by:

compare in interface Comparator<T>

fromBytes

public T fromBytes(byte[] value)

Specified by:

fromBytes in interface TypeStrategy<T>