org.apache.hadoop.fs

类 FileStatus

java.lang.Object

org.apache.hadoop.fs.FileStatus

所有已实现的接口:

Comparable, Writable

public class FileStatus
extends Object
implements Writable, Comparable

Interface that represents the client side information for a file.

构造器概要

构造器

构造器和说明
FileStatus()
FileStatus(long length, boolean isdir, int block_replication, long blocksize, long modification_time, long access_time, FsPermission permission, String owner, String group, Path path)
FileStatus(long length, boolean isdir, int block_replication, long blocksize, long modification_time, Path path)

方法概要

方法

限定符和类型	方法和说明
int	compareTo(Object o) Compare this object to another object
boolean	equals(Object o) Compare if this object is equal to another object
long	getAccessTime() Get the access time of the file.
long	getBlockSize() Get the block size of the file.
String	getGroup() Get the group associated with the file.
long	getLen()
long	getModificationTime() Get the modification time of the file.
String	getOwner() Get the owner of the file.
Path	getPath()
FsPermission	getPermission() Get FsPermission associated with the file.
short	getReplication() Get the replication factor of a file.
int	hashCode() Returns a hash code value for the object, which is defined as the hash code of the path name.
boolean	isDir() Is this a directory?
void	readFields(DataInput in) Deserialize the fields of this object from in.
protected void	setGroup(String group) Sets group.
protected void	setOwner(String owner) Sets owner.
protected void	setPermission(FsPermission permission) Sets permission.
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, toString, wait, wait, wait

构造器详细资料

FileStatus

public FileStatus()

FileStatus

public FileStatus(long length,
          boolean isdir,
          int block_replication,
          long blocksize,
          long modification_time,
          Path path)

FileStatus

public FileStatus(long length,
          boolean isdir,
          int block_replication,
          long blocksize,
          long modification_time,
          long access_time,
          FsPermission permission,
          String owner,
          String group,
          Path path)

方法详细资料

getLen

public long getLen()

isDir

public boolean isDir()

Is this a directory?

返回:

true if this is a directory

getBlockSize

public long getBlockSize()

Get the block size of the file.

返回:

the number of bytes

getReplication

public short getReplication()

Get the replication factor of a file.

返回:

the replication factor of a file.

getModificationTime

public long getModificationTime()

Get the modification time of the file.

返回:

the modification time of file in milliseconds since January 1, 1970 UTC.

getAccessTime

public long getAccessTime()

Get the access time of the file.

返回:

the access time of file in milliseconds since January 1, 1970 UTC.

getPermission

public FsPermission getPermission()

Get FsPermission associated with the file.

返回:

permssion. If a filesystem does not have a notion of permissions or if permissions could not be determined, then default permissions equivalent of "rwxrwxrwx" is returned.

getOwner

public String getOwner()

Get the owner of the file.

返回:

owner of the file. The string could be empty if there is no notion of owner of a file in a filesystem or if it could not be determined (rare).

getGroup

public String getGroup()

Get the group associated with the file.

返回:

group for the file. The string could be empty if there is no notion of group of a file in a filesystem or if it could not be determined (rare).

getPath

public Path getPath()

setPermission

protected void setPermission(FsPermission permission)

Sets permission.

参数:

permission - if permission is null, default value is set

setOwner

protected void setOwner(String owner)

Sets owner.

参数:

owner - if it is null, default value is set

setGroup

protected void setGroup(String group)

Sets group.

参数:

group - if it is null, default value is set

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(Object o)

Compare this object to another object

指定者:

compareTo 在接口中 Comparable

参数:

o - the object to be compared.

返回:

a negative integer, zero, or a positive integer as this object is less than, equal to, or greater than the specified object.

抛出:

ClassCastException - if the specified object's is not of type FileStatus

equals

public boolean equals(Object o)

Compare if this object is equal to another object

覆盖:

equals 在类中 Object

参数:

o - the object to be compared.

返回:

true if two file status has the same path name; false if not.

hashCode

public int hashCode()

Returns a hash code value for the object, which is defined as the hash code of the path name.

覆盖:

hashCode 在类中 Object

返回:

a hash code value for the path name.