io.druid.segment.data

Class CompressedObjectStrategy<T extends Buffer>

java.lang.Object

io.druid.segment.data.CompressedObjectStrategy<T>

All Implemented Interfaces:

ObjectStrategy<ResourceHolder<T>>, Comparator<ResourceHolder<T>>

Direct Known Subclasses:

CompressedFloatBufferObjectStrategy, CompressedLongBufferObjectStrategy

public class CompressedObjectStrategy<T extends Buffer>
extends Object
implements ObjectStrategy<ResourceHolder<T>>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CompressedObjectStrategy.BufferConverter<T>

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	CompressedObjectStrategy(ByteOrder order, CompressedObjectStrategy.BufferConverter<T> converter)

Method Summary

Methods

Modifier and Type	Method and Description
int	compare(ResourceHolder<T> o1, ResourceHolder<T> o2)
ResourceHolder<T>	fromByteBuffer(ByteBuffer buffer, int numBytes) Convert values from their underlying byte representation.
Class<? extends ResourceHolder<T>>	getClazz()
byte[]	toBytes(ResourceHolder<T> holder)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

CompressedObjectStrategy

protected CompressedObjectStrategy(ByteOrder order,
                        CompressedObjectStrategy.BufferConverter<T> converter)

Method Detail

getClazz

public Class<? extends ResourceHolder<T>> getClazz()

Specified by:

getClazz in interface ObjectStrategy<ResourceHolder<T extends Buffer>>

fromByteBuffer

public ResourceHolder<T> fromByteBuffer(ByteBuffer buffer,
                               int numBytes)

Description copied from interface: ObjectStrategy

Convert values from their underlying byte representation. Implementations of this method must not change the given buffer mark, or limit, but may modify its position. Use buffer.asReadOnlyBuffer() or buffer.duplicate() if mark or limit need to be set.

Specified by:

fromByteBuffer in interface ObjectStrategy<ResourceHolder<T extends Buffer>>

Parameters:

buffer - buffer to read value from

numBytes - number of bytes used to store the value, starting at buffer.position()

Returns:

an object created from the given byte buffer representation

toBytes

public byte[] toBytes(ResourceHolder<T> holder)

Specified by:

toBytes in interface ObjectStrategy<ResourceHolder<T extends Buffer>>

compare

public int compare(ResourceHolder<T> o1,
          ResourceHolder<T> o2)

Specified by:

compare in interface Comparator<ResourceHolder<T extends Buffer>>