Package org.apache.hadoop.hdfs.server.namenode

Class INodesInPath

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.INodesInPath

public class INodesInPath
extends java.lang.Object

Contains INodes information resolved from a given path.

Field Summary

Fields

Modifier and Type	Field	Description
static org.slf4j.Logger	LOG

Method Summary

Modifier and Type	Method	Description
static INodesInPath	append(INodesInPath iip, INode child, byte[] childName)	Extend a given INodesInPath with a child INode.
INodesInPath	getExistingINodes()
INode	getINode(int i)
INode[]	getINodesArray()
INode	getLastINode()
int	getLatestSnapshotId()	For non-snapshot paths, return the latest snapshot id found in the path.
INodesInPath	getParentINodesInPath()
java.lang.String	getParentPath()
java.lang.String	getPath()
java.lang.String	getPath(int pos)
byte[]	getPathComponent(int i)
byte[][]	getPathComponents()
int	getPathSnapshotId()	For snapshot paths, return the id of the snapshot specified in the path.
boolean	isDescendant(INodeDirectory inodeDirectory)	Verify if this INodesInPath is a descendant of the requested INodeDirectory.
boolean	isRaw()
int	length()
static INodesInPath	replace(INodesInPath iip, int pos, INode inode)	Replace an inode of the given INodesInPath in the given position.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.slf4j.Logger LOG

Method Detail

replace

public static INodesInPath replace(INodesInPath iip,
                                   int pos,
                                   INode inode)

Replace an inode of the given INodesInPath in the given position. We do a deep copy of the INode array.

Parameters:

pos - the position of the replacement

inode - the new inode

Returns:

a new INodesInPath instance

append

public static INodesInPath append(INodesInPath iip,
                                  INode child,
                                  byte[] childName)

Extend a given INodesInPath with a child INode. The child INode will be appended to the end of the new INodesInPath.

getLatestSnapshotId

public int getLatestSnapshotId()

For non-snapshot paths, return the latest snapshot id found in the path.

getPathSnapshotId

public int getPathSnapshotId()

For snapshot paths, return the id of the snapshot specified in the path. For non-snapshot paths, return Snapshot.CURRENT_STATE_ID.

getINode

public INode getINode(int i)

Returns:

the i-th inode if i >= 0; otherwise, i < 0, return the (length + i)-th inode.

getLastINode

public INode getLastINode()

Returns:

the last inode.

getPathComponents

public byte[][] getPathComponents()

getPathComponent

public byte[] getPathComponent(int i)

getPath

public java.lang.String getPath()

Returns:

the full path in string form

getParentPath

public java.lang.String getParentPath()

getPath

public java.lang.String getPath(int pos)

length

public int length()

getINodesArray

public INode[] getINodesArray()

getParentINodesInPath

public INodesInPath getParentINodesInPath()

Returns:

an INodesInPath instance containing all the INodes in the parent path. We do a deep copy here.

isDescendant

public boolean isDescendant(INodeDirectory inodeDirectory)

Verify if this INodesInPath is a descendant of the requested INodeDirectory.

Parameters:

inodeDirectory - the ancestor directory

Returns:

true if this INodesInPath is a descendant of inodeDirectory

getExistingINodes

public INodesInPath getExistingINodes()

Returns:

a new INodesInPath instance that only contains existing INodes. Note that this method only handles non-snapshot paths.

isRaw

public boolean isRaw()

Returns:

if this is a /.reserved/raw path.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object