org.apache.hadoop.io

类 SequenceFile.Metadata

java.lang.Object

org.apache.hadoop.io.SequenceFile.Metadata

所有已实现的接口:

Writable

封闭类:

SequenceFile

public static class SequenceFile.Metadata
extends Object
implements Writable

The class encapsulating with the metadata of a file. The metadata of a file is a list of attribute name/value pairs of Text type.

构造器概要

构造器

构造器和说明
SequenceFile.Metadata()
SequenceFile.Metadata(TreeMap<Text,Text> arg)

方法概要

方法

限定符和类型	方法和说明
boolean	equals(SequenceFile.Metadata other)
Text	get(Text name)
TreeMap<Text,Text>	getMetadata()
int	hashCode()
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	set(Text name, Text value)
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.

从类继承的方法 java.lang.Object

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

构造器详细资料

SequenceFile.Metadata

public SequenceFile.Metadata()

SequenceFile.Metadata

public SequenceFile.Metadata(TreeMap<Text,Text> arg)

方法详细资料

get

public Text get(Text name)

set

public void set(Text name,
       Text value)

getMetadata

public TreeMap<Text,Text> getMetadata()

write

public void write(DataOutput out)
           throws IOException

从接口复制的说明: Writable

Serialize the fields of this object to out.

指定者:

write 在接口中 Writable

参数:

out - DataOuput to serialize this object into.

抛出:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

从接口复制的说明: Writable

Deserialize the fields of this object from in.

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

指定者:

readFields 在接口中 Writable

参数:

in - DataInput to deseriablize this object from.

抛出:

IOException

equals

public boolean equals(SequenceFile.Metadata other)

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object