Package org.apache.hadoop.hdfs.protocol

Class LayoutVersion.FeatureInfo

java.lang.Object

org.apache.hadoop.hdfs.protocol.LayoutVersion.FeatureInfo

Enclosing class:

LayoutVersion

public static class LayoutVersion.FeatureInfo
extends Object

Feature information.

Constructor Summary

Constructors

Constructor	Description
FeatureInfo(int lv, int ancestorLV, Integer minCompatLV, String description, boolean reserved, LayoutVersion.LayoutFeature... specialFeatures)
FeatureInfo(int lv, int ancestorLV, String description, boolean reserved, LayoutVersion.LayoutFeature... specialFeatures)

Method Summary

Modifier and Type	Method	Description
int	getAncestorLayoutVersion()	Accessor method for feature ancestor layout version
String	getDescription()	Accessor method for feature description
int	getLayoutVersion()	Accessor method for feature layout version
int	getMinimumCompatibleLayoutVersion()	Accessor method for feature minimum compatible layout version.
LayoutVersion.LayoutFeature[]	getSpecialFeatures()
boolean	isReservedForOldRelease()

Methods inherited from class java.lang.Object

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

Constructor Details

FeatureInfo

public FeatureInfo(int lv,
 int ancestorLV,
 String description,
 boolean reserved,
 LayoutVersion.LayoutFeature... specialFeatures)

FeatureInfo

public FeatureInfo(int lv,
 int ancestorLV,
 Integer minCompatLV,
 String description,
 boolean reserved,
 LayoutVersion.LayoutFeature... specialFeatures)

Method Details

getLayoutVersion

public int getLayoutVersion()

Accessor method for feature layout version

Returns:

int lv value

getAncestorLayoutVersion

public int getAncestorLayoutVersion()

Accessor method for feature ancestor layout version

Returns:

int ancestor LV value

getMinimumCompatibleLayoutVersion

public int getMinimumCompatibleLayoutVersion()

Accessor method for feature minimum compatible layout version. If the feature does not define a minimum compatible layout version, then this method returns the feature's own layout version. This would indicate that the feature cannot provide compatibility with any prior layout version.

Returns:

int minimum compatible LV value

getDescription

public String getDescription()

Accessor method for feature description

Returns:

String feature description

isReservedForOldRelease

public boolean isReservedForOldRelease()

getSpecialFeatures

public LayoutVersion.LayoutFeature[] getSpecialFeatures()