Package org.apache.druid.segment.data

Class DecompressingByteBufferObjectStrategy

java.lang.Object

org.apache.druid.segment.data.DecompressingByteBufferObjectStrategy

All Implemented Interfaces:

Comparator<ResourceHolder<ByteBuffer>>, ObjectStrategy<ResourceHolder<ByteBuffer>>

public class DecompressingByteBufferObjectStrategy
extends Object
implements ObjectStrategy<ResourceHolder<ByteBuffer>>

Method Summary

Modifier and Type	Method	Description
boolean	canCompare()	Whether Comparator.compare(T, T) is valid or not.
int	compare(ResourceHolder<ByteBuffer> o1, ResourceHolder<ByteBuffer> o2)
ResourceHolder<ByteBuffer>	fromByteBuffer(ByteBuffer buffer, int numBytes)	Convert values from their underlying byte representation.
Class<ResourceHolder<ByteBuffer>>	getClazz()
static DecompressingByteBufferObjectStrategy	of(ByteOrder order, CompressionStrategy compression)
byte[]	toBytes(ResourceHolder<ByteBuffer> 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, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Methods inherited from interface org.apache.druid.segment.data.ObjectStrategy

fromByteBufferSafe, fromByteBufferWithSize, readRetainsBufferReference, writeTo

Method Detail

of

public static DecompressingByteBufferObjectStrategy of(ByteOrder order,
                                                       CompressionStrategy compression)

getClazz

public Class<ResourceHolder<ByteBuffer>> getClazz()

Specified by:

getClazz in interface ObjectStrategy<ResourceHolder<ByteBuffer>>

fromByteBuffer

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

Description copied from interface: ObjectStrategy

Convert values from their underlying byte representation. Implementations of this method may change the given buffer's mark, or limit, and position. Implementations of this method may not store the given buffer in a field of the "deserialized" object, need to use ByteBuffer.slice(), ByteBuffer.asReadOnlyBuffer() or ByteBuffer.duplicate() in this case.

Specified by:

fromByteBuffer in interface ObjectStrategy<ResourceHolder<ByteBuffer>>

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

canCompare

public boolean canCompare()

Description copied from interface: ObjectStrategy

Whether Comparator.compare(T, T) is valid or not.

Specified by:

canCompare in interface ObjectStrategy<ResourceHolder<ByteBuffer>>

compare

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

Specified by:

compare in interface Comparator<ResourceHolder<ByteBuffer>>

toBytes

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

Specified by:

toBytes in interface ObjectStrategy<ResourceHolder<ByteBuffer>>