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/*
* This file is part of WebLookAndFeel library.
*
* WebLookAndFeel library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* WebLookAndFeel library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with WebLookAndFeel library. If not, see .
*/
package com.alee.utils.system;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Java version information class.
*
* @author Mikle Garin
*/
public class JavaVersion
{
/**
* Java version string pattern.
*/
private static final Pattern versionPattern = Pattern.compile ( "(\\d+\\.\\d+)(\\.(\\d+))?(_([^-]+))?(.*)" );
/**
* Simple java version string pattern.
*/
private static final Pattern simpleVersionPattern = Pattern.compile ( "(\\d+\\.\\d+)(\\.(\\d+))?(.*)" );
/**
* Major java version.
*/
private double majorVersion;
/**
* Minor java version.
*/
private int minorVersion;
/**
* Java update number.
*/
private int updateNumber;
/**
* Java patch.
*/
private String patch;
/**
* Constructs JavaVersion with specified major version and update number.
*
* @param major major java version
* @param update java update number
*/
public JavaVersion ( final double major, final int update )
{
super ();
majorVersion = major;
minorVersion = 0;
updateNumber = update;
}
/**
* Constructs JavaVersion with specified major version, minor version and update number.
*
* @param major major java version
* @param minor minor java version
* @param update java update number
*/
public JavaVersion ( final double major, final int minor, final int update )
{
super ();
majorVersion = major;
minorVersion = minor;
updateNumber = update;
}
/**
* Constructs JavaVersion using the specified java version.
*
* @param version java version string
*/
public JavaVersion ( final String version )
{
super ();
applyJavaVersion ( version );
}
/**
* Applies specified java version.
*
* @param version java version
*/
public void applyJavaVersion ( final String version )
{
try
{
final Matcher matcher = versionPattern.matcher ( version );
if ( matcher.matches () )
{
final int groups = matcher.groupCount ();
majorVersion = Double.parseDouble ( matcher.group ( 1 ) );
if ( groups >= 3 && matcher.group ( 3 ) != null )
{
minorVersion = Integer.parseInt ( matcher.group ( 3 ) );
}
if ( groups >= 5 && matcher.group ( 5 ) != null )
{
try
{
updateNumber = Integer.parseInt ( matcher.group ( 5 ) );
}
catch ( final NumberFormatException e )
{
patch = matcher.group ( 5 );
}
}
if ( groups >= 6 && matcher.group ( 6 ) != null )
{
final String s = matcher.group ( 6 );
if ( s != null && s.trim ().length () > 0 )
{
patch = s;
}
}
}
}
catch ( final NumberFormatException e )
{
try
{
final Matcher matcher = simpleVersionPattern.matcher ( version );
if ( matcher.matches () )
{
final int groups = matcher.groupCount ();
majorVersion = Double.parseDouble ( matcher.group ( 1 ) );
if ( groups >= 3 && matcher.group ( 3 ) != null )
{
minorVersion = Integer.parseInt ( matcher.group ( 3 ) );
}
}
}
catch ( final NumberFormatException e1 )
{
majorVersion = 1.4;
minorVersion = 0;
updateNumber = 0;
}
}
}
/**
* Returns a negative integer, zero, or a positive integer if this java version is less than, equal to, or greater than the other one.
*
* @param major major java version
* @param minor minor java version
* @param update java update number
* @return a negative integer, zero, or a positive integer if this java version is less than, equal to, or greater than the other one
*/
public int compareVersion ( final double major, final int minor, final int update )
{
final double majorResult = majorVersion - major;
if ( majorResult != 0 )
{
return majorResult < 0 ? -1 : 1;
}
final int result = minorVersion - minor;
if ( result != 0 )
{
return result;
}
return updateNumber - update;
}
/**
* Returns major java version.
*
* @return major java version
*/
public double getMajorVersion ()
{
return majorVersion;
}
/**
* Returns minor java version.
*
* @return minor java version
*/
public int getMinorVersion ()
{
return minorVersion;
}
/**
* Returns java update number.
*
* @return java update number
*/
public int getUpdateNumber ()
{
return updateNumber;
}
/**
* Returns java patch.
*
* @return java patch
*/
public String getPatch ()
{
return patch;
}
}
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