alluxio.client.keyvalue

Class KeyValuePair

java.lang.Object

alluxio.client.keyvalue.KeyValuePair

All Implemented Interfaces:

Comparable<KeyValuePair>

@ThreadSafe
public class KeyValuePair
extends Object
implements Comparable<KeyValuePair>

A key-value pair.

Constructor Summary

Constructors

Constructor and Description
KeyValuePair(byte[] key, byte[] value) Constructs a key-value pair.
KeyValuePair(ByteBuffer key, ByteBuffer value) Constructs a key-value pair.

Method Summary

Modifier and Type	Method and Description
int	compareTo(KeyValuePair o) Compares this key-value pair to another.
boolean	equals(Object o) Tells whether or not this key-value pair is equal to another object.
ByteBuffer	getKey()
ByteBuffer	getValue()
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyValuePair

public KeyValuePair(ByteBuffer key,
                    ByteBuffer value)

Constructs a key-value pair. Direct references of key or value is passed in as class members, no copy happens.

Parameters:

key - the key, cannot be null

value - the value, cannot be null

KeyValuePair

public KeyValuePair(byte[] key,
                    byte[] value)

Constructs a key-value pair. The key or value is directly wrapped into the corresponding internalByteBuffer, no copy happens.

Parameters:

key - the key, cannot be null

value - the value, cannot be null

Method Detail

getKey

public ByteBuffer getKey()

Returns:

the direct reference of the internal key, no copy happens

getValue

public ByteBuffer getValue()

Returns:

the direct reference of the internal value, no copy happens

compareTo

public int compareTo(KeyValuePair o)

Compares this key-value pair to another.

Two pairs are compared by comparing their key ByteBuffer.

Specified by:

compareTo in interface Comparable<KeyValuePair>

Parameters:

o - the object to be compared, cannot be null

Returns:

A negative integer, zero, or a positive integer as the key of this pair is less than, equal to, or greater than that of the given pair

equals

public boolean equals(Object o)

Tells whether or not this key-value pair is equal to another object.

Two key-value pairs are equal if, and only if, their key and value ByteBuffers are equal to each other.

Overrides:

equals in class Object

Parameters:

o - the object to which this pair is to be compared

Returns:

true if, and only if, this pair is equal to the given object

hashCode

public int hashCode()

Overrides:

hashCode in class Object