CompatibilityRule.java

package eu.thog92.launcher.version;

import eu.thog92.launcher.util.OperatingSystem;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class CompatibilityRule
{

    private Action action = Action.ALLOW;
    private OSRestriction os;

    public CompatibilityRule(CompatibilityRule compatibilityRule)
    {
        this.action = compatibilityRule.action;
        if (compatibilityRule.os != null)
        {
            this.os = new OSRestriction(compatibilityRule.os);
        }
    }

    public Action getAppliedAction()
    {
        if ((this.os != null) && (!this.os.isCurrentOperatingSystem()))
        {
            return null;
        }
        return this.action;
    }

    public Action getAction()
    {
        return this.action;
    }

    public OSRestriction getOs()
    {
        return this.os;
    }

    @Override
    public String toString()
    {
        return "Rule{action=" + this.action + ", os=" + this.os + '}';
    }

    public enum Action
    {
        ALLOW, DISALLOW;

        Action()
        {
        }
    }

    public class OSRestriction
    {
        private OperatingSystem name;
        private String version;
        private String arch;


        public OSRestriction(OSRestriction osRestriction)
        {
            this.name = osRestriction.name;
            this.version = osRestriction.version;
            this.arch = osRestriction.arch;
        }

        public OperatingSystem getName()
        {
            return this.name;
        }

        public String getVersion()
        {
            return this.version;
        }

        public String getArch()
        {
            return this.arch;
        }

        public boolean isCurrentOperatingSystem()
        {
            if ((this.name != null) && (this.name != OperatingSystem.getCurrentPlatform()))
            {
                return false;
            }
            if (this.version != null)
            {
                try
                {
                    Pattern pattern = Pattern.compile(this.version);
                    Matcher matcher = pattern.matcher(System.getProperty("os.version"));
                    if (!matcher.matches())
                    {
                        return false;
                    }
                } catch (Throwable ignored)
                {
                }
            }
            if (this.arch != null)
            {
                try
                {
                    Pattern pattern = Pattern.compile(this.arch);
                    Matcher matcher = pattern.matcher(System.getProperty("os.arch"));
                    if (!matcher.matches())
                    {
                        return false;
                    }
                } catch (Throwable ignored)
                {
                }
            }

            return true;
        }

        @Override
        public String toString()
        {
            return "OSRestriction{name=" + this.name + ", version='" + this.version + '\'' + ", arch='" + this.arch + '\'' + '}';
        }
    }
}