org.apache.hadoop.hbase.types

Class OrderedFloat64

java.lang.Object

org.apache.hadoop.hbase.types.OrderedBytesBase<Double>

org.apache.hadoop.hbase.types.OrderedFloat64

All Implemented Interfaces:

DataType<Double>

@InterfaceAudience.Public
public class OrderedFloat64
extends OrderedBytesBase<Double>

A double of 64-bits using a fixed-length encoding. Built on OrderedBytes.encodeFloat64(PositionedByteRange, double, Order).

Field Summary

Fields

Modifier and Type	Field and Description
static OrderedFloat64	ASCENDING
static OrderedFloat64	DESCENDING

Fields inherited from class org.apache.hadoop.hbase.types.OrderedBytesBase

order

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	OrderedFloat64(Order order)

Method Summary

Modifier and Type	Method and Description
Double	decode(PositionedByteRange src) Read an instance of T from the buffer src.
double	decodeDouble(PositionedByteRange src) Read a double value from the buffer src.
int	encode(PositionedByteRange dst, Double val) Write instance val into buffer dst.
Class<Double>	encodedClass() Inform consumers over what type this DataType operates.
int	encodedLength(Double val) Inform consumers how long the encoded byte[] will be.
int	encodeDouble(PositionedByteRange dst, double val) Write instance val into buffer dst.
boolean	isNullable() Indicates whether this instance supports encoding null values.

Methods inherited from class org.apache.hadoop.hbase.types.OrderedBytesBase

getOrder, isOrderPreserving, isSkippable, skip

Methods inherited from class java.lang.Object

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

Field Detail

ASCENDING

public static final OrderedFloat64 ASCENDING

DESCENDING

public static final OrderedFloat64 DESCENDING

Constructor Detail

OrderedFloat64

protected OrderedFloat64(Order order)

Method Detail

isNullable

public boolean isNullable()

Description copied from interface: DataType

Indicates whether this instance supports encoding null values. This depends on the implementation details of the encoding format. All DataTypes that support null should treat null as comparing less than any non-null value for default sort ordering purposes.

Specified by:

isNullable in interface DataType<Double>

Overrides:

isNullable in class OrderedBytesBase<Double>

Returns:

true when null is supported, false otherwise.

encodedLength

public int encodedLength(Double val)

Description copied from interface: DataType

Inform consumers how long the encoded byte[] will be.

Parameters:

val - The value to check.

Returns:

the number of bytes required to encode val.a

encodedClass

public Class<Double> encodedClass()

Description copied from interface: DataType

Inform consumers over what type this DataType operates. Useful when working with bare DataType instances.

decode

public Double decode(PositionedByteRange src)

Description copied from interface: DataType

Read an instance of T from the buffer src.

Parameters:

src - the buffer containing the encoded value.

encode

public int encode(PositionedByteRange dst,
                  Double val)

Description copied from interface: DataType

Write instance val into buffer dst.

Parameters:

dst - the buffer containing the encoded value.

val - the value to encode onto dst.

Returns:

number of bytes written.

decodeDouble

public double decodeDouble(PositionedByteRange src)

Read a double value from the buffer src.

encodeDouble

public int encodeDouble(PositionedByteRange dst,
                        double val)

Write instance val into buffer dst.