com.google.cloud.hadoop.util

Class HadoopVersionInfo

java.lang.Object

com.google.cloud.hadoop.util.HadoopVersionInfo

public class HadoopVersionInfo
extends Object

Provides information regarding the currently loaded Hadoop version.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	HadoopVersionInfo.ParseState ParseState is used by subclasses that are parsing version strings.

Constructor Summary

Constructors

Constructor and Description
HadoopVersionInfo() Construct a HadoopVersionInfo using the version string contained in VersionInfo.getVersion().
HadoopVersionInfo(String versionString) Construct a HadoopVersionInfo using the passed version string

Method Summary

Modifier and Type	Method and Description
protected void	discardSeparator(HadoopVersionInfo.ParseState state)
static HadoopVersionInfo	getInstance()
com.google.common.base.Optional<Integer>	getMajorVersion() Get the major part of the version.
com.google.common.base.Optional<Integer>	getMinorVersion() Get the minor part of the version
com.google.common.base.Optional<Integer>	getPatchLevel() Get the patch level of the version
boolean	isEqualTo(int major, int minor) Determine if the object is equal to the given major / minor versions
boolean	isGreaterThan(int major, int minor) Determine if this object is greater than the passed version number.
boolean	isLessThan(int major, int minor) Determine if this object is less than the passed version number.
protected com.google.common.base.Optional<Integer>	parseNumberPiece(HadoopVersionInfo.ParseState state)
protected boolean	parseVersionString(String version)

Methods inherited from class java.lang.Object

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

Constructor Detail

HadoopVersionInfo

public HadoopVersionInfo()

Construct a HadoopVersionInfo using the version string contained in VersionInfo.getVersion().

HadoopVersionInfo

public HadoopVersionInfo(String versionString)

Construct a HadoopVersionInfo using the passed version string

Parameters:

versionString - A string of the form major.minor.patch

Method Detail

getInstance

public static HadoopVersionInfo getInstance()

parseVersionString

protected boolean parseVersionString(String version)

parseNumberPiece

protected com.google.common.base.Optional<Integer> parseNumberPiece(HadoopVersionInfo.ParseState state)

discardSeparator

protected void discardSeparator(HadoopVersionInfo.ParseState state)

getMajorVersion

public com.google.common.base.Optional<Integer> getMajorVersion()

Get the major part of the version.

getMinorVersion

public com.google.common.base.Optional<Integer> getMinorVersion()

Get the minor part of the version

getPatchLevel

public com.google.common.base.Optional<Integer> getPatchLevel()

Get the patch level of the version

isGreaterThan

public boolean isGreaterThan(int major,
                             int minor)

Determine if this object is greater than the passed version number. In order for a component to be included in the calculation it must be present in the version string.

Parameters:

major - The major number to compare against

minor - The minor number to compare against

Returns:

True if the version curently running is greater than the given major and minor version numbers.

isLessThan

public boolean isLessThan(int major,
                          int minor)

Determine if this object is less than the passed version number. In order for a component to be included in the calculation it must be present in the version string.

Parameters:

major - The major number to compare against

minor - The minor number to compare against

Returns:

True if the version curently running is less than the given major and minor version numbers.

isEqualTo

public boolean isEqualTo(int major,
                         int minor)

Determine if the object is equal to the given major / minor versions

Parameters:

major - The major version number

minor - The minor version number

Returns:

True if the version curently running matches both the major and minor version numbers.