org.apache.hadoop.io

Class EnumSetWritable<E extends Enum<E>>

java.lang.Object

java.util.AbstractCollection<E>

org.apache.hadoop.io.EnumSetWritable<E>

All Implemented Interfaces:

Iterable<E>, Collection<E>, Configurable, Writable

@InterfaceAudience.Public
@InterfaceStability.Stable
public class EnumSetWritable<E extends Enum<E>>
extends AbstractCollection<E>
implements Writable, Configurable

A Writable wrapper for EnumSet.

Constructor Summary

Constructors

Constructor and Description
EnumSetWritable(EnumSet<E> value) Construct a new EnumSetWritable.
EnumSetWritable(EnumSet<E> value, Class<E> elementType) Construct a new EnumSetWritable.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(E e)
boolean	equals(Object o) Returns true if o is an EnumSetWritable with the same value, or both are null.
EnumSet<E>	get() Return the value of this EnumSetWritable.
Configuration	getConf() Return the configuration used by this object.
Class<E>	getElementType() Returns the class of all the elements of the underlying EnumSetWriable.
int	hashCode()
Iterator<E>	iterator()
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	set(EnumSet<E> value, Class<E> elementType) reset the EnumSetWritable with specified value and elementType.
void	setConf(Configuration conf) Set the configuration to be used by this object.
int	size()
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.

Methods inherited from class java.util.AbstractCollection

addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

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

Constructor Detail

EnumSetWritable

public EnumSetWritable(EnumSet<E> value,
               Class<E> elementType)

Construct a new EnumSetWritable. If the value argument is null or its size is zero, the elementType argument must not be null. If the argument value's size is bigger than zero, the argument elementType is not be used.

Parameters:

value -

elementType -

EnumSetWritable

public EnumSetWritable(EnumSet<E> value)

Construct a new EnumSetWritable. Argument value should not be null or empty.

Parameters:

value -

Method Detail

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Iterable<E extends Enum<E>>

Specified by:

iterator in interface Collection<E extends Enum<E>>

Specified by:

iterator in class AbstractCollection<E extends Enum<E>>

size

public int size()

Specified by:

size in interface Collection<E extends Enum<E>>

Specified by:

size in class AbstractCollection<E extends Enum<E>>

add

public boolean add(E e)

Specified by:

add in interface Collection<E extends Enum<E>>

Overrides:

add in class AbstractCollection<E extends Enum<E>>

set

public void set(EnumSet<E> value,
       Class<E> elementType)

reset the EnumSetWritable with specified value and elementType. If the value argument is null or its size is zero, the elementType argument must not be null. If the argument value's size is bigger than zero, the argument elementType is not be used.

Parameters:

value -

elementType -

get

public EnumSet<E> get()

Return the value of this EnumSetWritable.

readFields

public void readFields(DataInput in)
                throws IOException

Description copied from interface: Writable

Deserialize the fields of this object from in.

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

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

equals

public boolean equals(Object o)

Returns true if o is an EnumSetWritable with the same value, or both are null.

Specified by:

equals in interface Collection<E extends Enum<E>>

Overrides:

equals in class Object

getElementType

public Class<E> getElementType()

Returns the class of all the elements of the underlying EnumSetWriable. It may return null.

Returns:

the element class

hashCode

public int hashCode()

Specified by:

hashCode in interface Collection<E extends Enum<E>>

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class AbstractCollection<E extends Enum<E>>

getConf

public Configuration getConf()

Description copied from interface: Configurable

Return the configuration used by this object.

Specified by:

getConf in interface Configurable

setConf

public void setConf(Configuration conf)

Description copied from interface: Configurable

Set the configuration to be used by this object.

Specified by:

setConf in interface Configurable