org.apache.hadoop.util.bloom

类 Key

java.lang.Object

org.apache.hadoop.util.bloom.Key

所有已实现的接口:

Comparable<Key>, Writable, WritableComparable<Key>

public class Key
extends Object
implements WritableComparable<Key>

The general behavior of a key that must be stored in a filter.

另请参阅:

The general behavior of a filter

构造器概要

构造器

构造器和说明
Key() default constructor - use with readFields
Key(byte[] value) Constructor.
Key(byte[] value, double weight) Constructor.

方法概要

方法

限定符和类型	方法和说明
int	compareTo(Key other)
boolean	equals(Object o)
byte[]	getBytes()
double	getWeight()
int	hashCode()
void	incrementWeight() Increments the weight of this key by one.
void	incrementWeight(double weight) Increments the weight of this key with a specified value.
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	set(byte[] value, double weight)
void	write(DataOutput out) Serialize the fields of this object to out.

从类继承的方法 java.lang.Object

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

构造器详细资料

Key

public Key()

default constructor - use with readFields

Key

public Key(byte[] value)

Constructor.

Builds a key with a default weight.

参数:

value - The byte value of this key.

Key

public Key(byte[] value,
   double weight)

Constructor.

Builds a key with a specified weight.

参数:

value - The value of this key.

weight - The weight associated to this key.

方法详细资料

set

public void set(byte[] value,
       double weight)

参数:

value -

weight -

getBytes

public byte[] getBytes()

返回:

byte[] The value of this key.

getWeight

public double getWeight()

返回:

Returns the weight associated to this key.

incrementWeight

public void incrementWeight(double weight)

Increments the weight of this key with a specified value.

参数:

weight - The increment.

incrementWeight

public void incrementWeight()

Increments the weight of this key by one.

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

write

public void write(DataOutput out)
           throws IOException

从接口复制的说明: Writable

Serialize the fields of this object to out.

指定者:

write 在接口中 Writable

参数:

out - DataOuput to serialize this object into.

抛出:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

从接口复制的说明: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

指定者:

readFields 在接口中 Writable

参数:

in - DataInput to deseriablize this object from.

抛出:

IOException

compareTo

public int compareTo(Key other)

指定者:

compareTo 在接口中 Comparable<Key>