org.apache.hadoop.io

クラス ArrayWritable

java.lang.Object

org.apache.hadoop.io.ArrayWritable

すべての実装されたインタフェース:

Writable

@InterfaceAudience.Public
 @InterfaceStability.Stable
public class ArrayWritable
extends Object
implements Writable

A Writable for arrays containing instances of a class. The elements of this writable must all be instances of the same class. If this writable will be the input for a Reducer, you will need to create a subclass that sets the value to be of the proper type. For example: public class IntArrayWritable extends ArrayWritable { public IntArrayWritable() { super(IntWritable.class); } }

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
ArrayWritable(Class<? extends Writable> valueClass)
ArrayWritable(Class<? extends Writable> valueClass, Writable[] values)
ArrayWritable(String[] strings)

メソッドのサマリー

修飾子とタイプ	メソッドと説明
Writable[]	get()
Class	getValueClass()
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	set(Writable[] values)
Object	toArray()
String[]	toStrings()
void	write(DataOutput out) Serialize the fields of this object to out.

クラスから継承されたメソッド java.lang.Object

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

コンストラクタの詳細

ArrayWritable

public ArrayWritable(Class<? extends Writable> valueClass)

ArrayWritable

public ArrayWritable(Class<? extends Writable> valueClass,
                     Writable[] values)

ArrayWritable

public ArrayWritable(String[] strings)

メソッドの詳細

getValueClass

public Class getValueClass()

toStrings

public String[] toStrings()

toArray

public Object toArray()

set

public void set(Writable[] values)

get

public Writable[] get()

readFields

public void readFields(DataInput in)
                throws IOException

インタフェースからコピーされた説明: Writable

Deserialize the fields of this object from in.

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

定義:

readFields インタフェース内 Writable

パラメータ:

in - DataInput to deseriablize this object from.

例外:

IOException

write

public void write(DataOutput out)
           throws IOException

インタフェースからコピーされた説明: Writable

Serialize the fields of this object to out.

定義:

write インタフェース内 Writable

パラメータ:

out - DataOuput to serialize this object into.

例外:

IOException