org.eclipse.persistence.internal.helper

Class JavaVersion

java.lang.Object

org.eclipse.persistence.internal.helper.JavaVersion

public final class JavaVersion
extends java.lang.Object

Java version storage class. Used for version numbers retrieved from Java specification version string. Stored version is in <major>.<minor> format.

Author:

Tomas Kraus, Peter Benedikovic

Field Summary

Fields

Modifier and Type	Field and Description
static char	PATCH_SEPARATOR JavaEE platform patch version element separator character.
static char	SEPARATOR JavaEE platform version elements separator character.

Constructor Summary

Constructors

Constructor and Description
JavaVersion(int major, int minor) Constructs an instance of Java specification version number.

Method Summary

Modifier and Type	Method and Description
int	comapreTo(JavaVersion version) Compares this JavaVersion object against another one.
int	getMajor() Get major version number.
int	getMinor() Get minor version number.
JavaSEPlatform	toPlatform() Return JavaSEPlatform matching this Java SE specification version.
java.lang.String	toString() Return String representation of Java VM version object.
static JavaVersion	vmVersion() Java specification version detector.
static java.lang.String	vmVersionString() Retrieves Java specification version String from JDK system property.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

SEPARATOR

public static final char SEPARATOR

JavaEE platform version elements separator character.

See Also:

Constant Field Values

PATCH_SEPARATOR

public static final char PATCH_SEPARATOR

JavaEE platform patch version element separator character.

See Also:

Constant Field Values

Constructor Detail

JavaVersion

public JavaVersion(int major,
                   int minor)

Constructs an instance of Java specification version number.

Parameters:

major - Major version number.

minor - Minor version number.

Method Detail

vmVersionString

public static java.lang.String vmVersionString()

Retrieves Java specification version String from JDK system property.

Returns:

Java specification version String from JDK system property.

vmVersion

public static JavaVersion vmVersion()

Java specification version detector. Retrieves Java specification version from JDK system property. Version string should look like:

• "MA.MI"

Where

• MA is major version number,
• MI is minor version number

Label java version is parsed as non case sensitive.

getMajor

public final int getMajor()

Get major version number.

Returns:

Major version number.

getMinor

public final int getMinor()

Get minor version number.

Returns:

Minor version number.

comapreTo

public final int comapreTo(JavaVersion version)

Compares this JavaVersion object against another one.

Parameters:

version - JavaVersion object to compare with this object.

Returns:

Compare result:

• Value 1 if this value is greater than supplied version value.
• Value -1 if this value is lesser than supplied version value.
• Value 0 if both this value and supplied version values are equal.

toString

public final java.lang.String toString()

Return String representation of Java VM version object.

Overrides:

toString in class java.lang.Object

Returns:

Java VM version string.

toPlatform

public final JavaSEPlatform toPlatform()

Return JavaSEPlatform matching this Java SE specification version.

Returns:

JavaSEPlatform matching this Java SE specification version.