com.asakusafw.runtime.stage.collector

Class SortableSlot

java.lang.Object

com.asakusafw.runtime.stage.collector.SortableSlot

All Implemented Interfaces:

Comparable<SortableSlot>, org.apache.hadoop.io.Writable, org.apache.hadoop.io.WritableComparable<SortableSlot>

public class SortableSlot
extends Object
implements org.apache.hadoop.io.WritableComparable<SortableSlot>

A sortable data slot.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SortableSlot.Comparator A comparator for SortableSlot.
static class	SortableSlot.Partitioner A partitioner for SortableSlot.

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME_ADD The method name of add(Writable).
static String	NAME_ADD_BYTE The method name of addByte(int).
static String	NAME_ADD_RANDOM The method name of addRandom().
static String	NAME_BEGIN The method name of begin(int).

Constructor Summary

Constructors

Constructor and Description
SortableSlot()

Method Summary

Modifier and Type	Method and Description
void	add(org.apache.hadoop.io.Writable data) Adds an object.
void	addByte(int data) Adds an unsigned byte value.
void	addRandom() Adds a 32-bits random value.
void	begin(int slot) Begins to write key items into this object.
int	compareTo(SortableSlot o)
boolean	equals(Object obj)
int	getSlot() Returns the current slot number.
int	hashCode()
void	readFields(DataInput in)
void	write(DataOutput out)

Methods inherited from class java.lang.Object

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

Field Detail

NAME_BEGIN

public static final String NAME_BEGIN

The method name of begin(int).

See Also:

Constant Field Values

NAME_ADD_BYTE

public static final String NAME_ADD_BYTE

The method name of addByte(int).

See Also:

Constant Field Values

NAME_ADD_RANDOM

public static final String NAME_ADD_RANDOM

The method name of addRandom().

See Also:

Constant Field Values

NAME_ADD

public static final String NAME_ADD

The method name of add(Writable).

See Also:

Constant Field Values

Constructor Detail

SortableSlot

public SortableSlot()

Method Detail

begin

public void begin(int slot)

Begins to write key items into this object.

Parameters:

slot - the target slot number

getSlot

public int getSlot()

Returns the current slot number.

Returns:

the current target slot number specified by begin(int)

addByte

public void addByte(int data)
             throws IOException

Adds an unsigned byte value.

Parameters:

data - the value (only use lower 8-bits)

Throws:

IOException - if failed to add the value

addRandom

public void addRandom()
               throws IOException

Adds a 32-bits random value.

Throws:

IOException - if failed to add the value

add

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

Adds an object.

Parameters:

data - the object

Throws:

IOException - if failed to add the value

write

public void write(DataOutput out)
           throws IOException

Specified by:

write in interface org.apache.hadoop.io.Writable

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Specified by:

readFields in interface org.apache.hadoop.io.Writable

Throws:

IOException

compareTo

public int compareTo(SortableSlot o)

Specified by:

compareTo in interface Comparable<SortableSlot>

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object