Package org.apache.hadoop.io

Class WritableName

java.lang.Object

org.apache.hadoop.io.WritableName

@Private
@Evolving
public class WritableName
extends java.lang.Object

Utility to permit renaming of Writable implementation classes without invalidiating files that contain their class name.

Method Summary

Modifier and Type	Method	Description
static void	addName(java.lang.Class<?> writableClass, java.lang.String name)	Add an alternate name for a class.
static java.lang.Class<?>	getClass(java.lang.String name, Configuration conf)	Return the class for a name.
static java.lang.String	getName(java.lang.Class<?> writableClass)	Return the name for a class.
static void	setName(java.lang.Class<?> writableClass, java.lang.String name)	Set the name that a class should be known as to something other than the class name.

Methods inherited from class java.lang.Object

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

Method Detail

setName

public static void setName(java.lang.Class<?> writableClass,
                           java.lang.String name)

Set the name that a class should be known as to something other than the class name.

Parameters:

writableClass - input writableClass.

name - input name.

addName

public static void addName(java.lang.Class<?> writableClass,
                           java.lang.String name)

Add an alternate name for a class.

Parameters:

writableClass - input writableClass.

name - input name.

getName

public static java.lang.String getName(java.lang.Class<?> writableClass)

Return the name for a class. Default is Class.getName().

Parameters:

writableClass - input writableClass.

Returns:

name for a class.

getClass

public static java.lang.Class<?> getClass(java.lang.String name,
                                          Configuration conf)
                                   throws java.io.IOException

Return the class for a name. Default is Class.forName(String).

Parameters:

name - input name.

conf - input configuration.

Returns:

class for a name.

Throws:

java.io.IOException - raised on errors performing I/O.