Block (Hadoop 1.2.2-SNAPSHOT API)

java.lang.Object
- org.apache.hadoop.hdfs.protocol.Block

所有已实现的接口:

Comparable<Block>, Writable

直接已知子类:

BlockMetaDataInfo
```
public class Block
extends Object
implements Writable, Comparable<Block>
```
A Block is a Hadoop FS primitive, identified by a long.

字段概要

字段
限定符和类型字段和说明

static long GRANDFATHER_GENERATION_STAMP

字段
限定符和类型	字段和说明
`static long`	`GRANDFATHER_GENERATION_STAMP`

构造器概要

构造器
构造器和说明
`Block()`
`Block(Block blk)`
`Block(File f, long len, long genstamp)` Find the blockid from the given filename
`Block(long blkid)`
`Block(long blkid, long len, long generationStamp)`

方法概要

方法
限定符和类型	方法和说明
`int`	`compareTo(Block b)`
`boolean`	`equals(Object o)`
`long`	`getBlockId()`
`String`	`getBlockName()`
`long`	`getGenerationStamp()`
`long`	`getNumBytes()`
`Block`	`getWithWildcardGS()`
`int`	`hashCode()`
`static boolean`	`isBlockFilename(File f)`
`void`	`readFields(DataInput in)` Deserialize the fields of this object from `in`.
`void`	`set(long blkid, long len, long genStamp)`
`void`	`setBlockId(long bid)`
`void`	`setGenerationStamp(long stamp)`
`void`	`setNumBytes(long len)`
`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, finalize, getClass, notify, notifyAll, wait, wait, wait

- 字段详细资料
  - GRANDFATHER_GENERATION_STAMP
```
public static final long GRANDFATHER_GENERATION_STAMP
```
    另请参阅:
    常量字段值
- 构造器详细资料
  - Block
```
public Block()
```
  - Block
```
public Block(long blkid,
     long len,
     long generationStamp)
```
  - Block
```
public Block(long blkid)
```
  - Block
```
public Block(Block blk)
```
  - Block
```
public Block(File f,
     long len,
     long genstamp)
```
    Find the blockid from the given filename
- 方法详细资料
  - isBlockFilename
```
public static boolean isBlockFilename(File f)
```
  - set
```
public void set(long blkid,
       long len,
       long genStamp)
```
  - getBlockId
```
public long getBlockId()
```
  - setBlockId
```
public void setBlockId(long bid)
```
  - getBlockName
```
public String getBlockName()
```
  - getNumBytes
```
public long getNumBytes()
```
  - setNumBytes
```
public void setNumBytes(long len)
```
  - getGenerationStamp
```
public long getGenerationStamp()
```
  - setGenerationStamp
```
public void setGenerationStamp(long stamp)
```
  - getWithWildcardGS
```
public Block getWithWildcardGS()
```
  - toString
```
public String toString()
```
    覆盖:
    
    toString 在类中 Object
  - 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
  - compareTo
```
public int compareTo(Block b)
```
    指定者:
    
    compareTo 在接口中 Comparable<Block>
  - equals
```
public boolean equals(Object o)
```
    覆盖:
    
    equals 在类中 Object
  - hashCode
```
public int hashCode()
```
    覆盖:
    
    hashCode 在类中 Object

类 Block

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

GRANDFATHER_GENERATION_STAMP

构造器详细资料

Block

Block

Block

Block

Block

方法详细资料

isBlockFilename

set

getBlockId

setBlockId

getBlockName

getNumBytes

setNumBytes

getGenerationStamp

setGenerationStamp

getWithWildcardGS

toString

write

readFields

compareTo

equals

hashCode