Package 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	Description
static char	PATCH_SEPARATOR	JavaEE platform patch version element separator character.
static char	SEPARATOR	JavaEE platform version elements separator character.
static java.lang.String	VM_VERSION_PROPERTY	Java VM version system property name.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	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 {@see String} from JDK system property.

Methods inherited from class java.lang.Object

clone, equals, finalize, 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

VM_VERSION_PROPERTY

public static final java.lang.String VM_VERSION_PROPERTY

Java VM version system property name.

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 {@see String} from JDK system property.

Returns:

Java specification version {@see String} from JDK system property.

vmVersion

public static JavaVersion vmVersion()

Java specification version detector.

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 or JavaSEPlatform.DEFAULT as default when platform matching fails.