io.druid.segment.data

Interface ObjectStrategy<T>

All Superinterfaces:

Comparator<T>

All Known Subinterfaces:

CacheableObjectStrategy<T>

All Known Implementing Classes:

DecompressingByteBufferObjectStrategy, DoublesSketchObjectStrategy, ImmutableRTreeObjectStrategy, SketchObjectStrategy

public interface ObjectStrategy<T>
extends Comparator<T>

Method Summary

Modifier and Type	Method and Description
T	fromByteBuffer(ByteBuffer buffer, int numBytes) Convert values from their underlying byte representation.
default T	fromByteBufferWithSize(ByteBuffer buffer) Reads 4-bytes numBytes from the given buffer, and then delegates to fromByteBuffer(ByteBuffer, int).
Class<? extends T>	getClazz()
byte[]	toBytes(T val)
default void	writeTo(T val, WriteOutBytes out)

Methods inherited from interface java.util.Comparator

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

Method Detail

getClazz

Class<? extends T> getClazz()

fromByteBuffer

T fromByteBuffer(ByteBuffer buffer,
                 int numBytes)

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.

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

byte[] toBytes(T val)

fromByteBufferWithSize

default T fromByteBufferWithSize(ByteBuffer buffer)

Reads 4-bytes numBytes from the given buffer, and then delegates to fromByteBuffer(ByteBuffer, int).

writeTo

default void writeTo(T val,
                     WriteOutBytes out)
              throws IOException

Throws:

IOException