com.asakusafw.runtime.flow.join

Class LookUpKey

java.lang.Object

com.asakusafw.runtime.flow.join.LookUpKey

public class LookUpKey
extends Object

A key for LookUpTable.

Since:

0.1.0

Version:

0.8.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	LookUpKey.View Represents a view of LookUpKey.

Constructor Summary

Constructors

Constructor and Description
LookUpKey() Creates a new instance w/ default initial buffer size.
LookUpKey(int bufferSize) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
void	add(org.apache.hadoop.io.Writable writable) Appends an element into the buffer.
LookUpKey	copy() Returns a copy of this key.
boolean	equals(Object obj)
LookUpKey.View	getDirectView() Returns a direct view of this key.
LookUpKey.View	getFrozenView() Returns a frozen view of this key.
int	hashCode()
void	reset() Clears the buffer.

Methods inherited from class java.lang.Object

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

Constructor Detail

LookUpKey

public LookUpKey()

Creates a new instance w/ default initial buffer size.

LookUpKey

public LookUpKey(int bufferSize)

Creates a new instance.

Parameters:

bufferSize - the initial buffer size

Method Detail

reset

public void reset()
           throws IOException

Clears the buffer.

Throws:

IOException - if failed to initialize the buffer

add

public void add(org.apache.hadoop.io.Writable writable)
         throws IOException

Appends an element into the buffer.

Parameters:

writable - the target element

Throws:

IOException - if error occurred while appending the element

IllegalArgumentException - if the parameter is null

copy

public LookUpKey copy()
               throws IOException

Returns a copy of this key.

Returns:

a copy of this

Throws:

IOException - if error occurred while creating a copy

getDirectView

public LookUpKey.View getDirectView()

Returns a direct view of this key.

Returns:

a direct view

Since:

0.8.0

getFrozenView

public LookUpKey.View getFrozenView()

Returns a frozen view of this key.

Returns:

a frozen view

Since:

0.8.0

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object