org.apache.hadoop.hbase.types

类 OrderedBytesBase<T>

java.lang.Object

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

所有已实现的接口:

DataType<T>

直接已知子类:

OrderedBlob, OrderedBlobVar, OrderedFloat32, OrderedFloat64, OrderedInt16, OrderedInt32, OrderedInt64, OrderedInt8, OrderedNumeric, OrderedString

@InterfaceAudience.Public
public abstract class OrderedBytesBase<T>
extends Object
implements DataType<T>

Base class for data types backed by the OrderedBytes encoding implementations.

字段概要

字段

限定符和类型	字段和说明
protected Order	order

构造器概要

构造器

限定符	构造器和说明
protected	OrderedBytesBase(Order order)

方法概要

限定符和类型	方法和说明
Order	getOrder() Retrieve the sort Order imposed by this data type, or null when natural ordering is not preserved.
boolean	isNullable() Indicates whether this instance supports encoding null values.
boolean	isOrderPreserving() Indicates whether this instance writes encoded byte[]'s which preserve the natural sort order of the unencoded value.
boolean	isSkippable() Indicates whether this instance is able to skip over it's encoded value.
int	skip(PositionedByteRange src) Skip src's position forward over one encoded value.

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.hbase.types.DataType

decode, encode, encodedClass, encodedLength

字段详细资料

order

protected final Order order

构造器详细资料

OrderedBytesBase

protected OrderedBytesBase(Order order)

方法详细资料

isOrderPreserving

public boolean isOrderPreserving()

从接口复制的说明: DataType

Indicates whether this instance writes encoded byte[]'s which preserve the natural sort order of the unencoded value.

指定者:

isOrderPreserving 在接口中 DataType<T>

返回:

true when natural order is preserved, false otherwise.

getOrder

public Order getOrder()

从接口复制的说明: DataType

Retrieve the sort Order imposed by this data type, or null when natural ordering is not preserved. Value is either ascending or descending. Default is assumed to be Order.ASCENDING.

指定者:

getOrder 在接口中 DataType<T>

isNullable

public boolean isNullable()

从接口复制的说明: 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.

指定者:

isNullable 在接口中 DataType<T>

返回:

true when null is supported, false otherwise.

isSkippable

public boolean isSkippable()

从接口复制的说明: DataType

Indicates whether this instance is able to skip over it's encoded value. DataTypes that are not skippable can only be used as the right-most field of a Struct.

指定者:

isSkippable 在接口中 DataType<T>

skip

public int skip(PositionedByteRange src)

从接口复制的说明: DataType

Skip src's position forward over one encoded value.

指定者:

skip 在接口中 DataType<T>

参数:

src - the buffer containing the encoded value.

返回:

number of bytes skipped.