replaced os detection with own simple system

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.github.psnrigner</groupId>
     <artifactId>discord-rpc-java</artifactId>
-    <version>1.0.4</version>
+    <version>1.0.5</version>
     <packaging>jar</packaging>
 
     <!-- Information for release -->
@@ -55,12 +55,6 @@
     </repositories>
 
     <dependencies>
-        <!-- Use apache lib to efficiently detect OS version, should prolly move to custom system -->
-        <dependency>
-            <groupId>commons-lang</groupId>
-            <artifactId>commons-lang</artifactId>
-            <version>2.6</version>
-        </dependency>
 
         <!-- Parse and write json objects -->
         <dependency>

src/main/java/com/github/psnrigner/discordrpcjava/impl/BaseConnection.java

@@ -1,6 +1,7 @@
 package com.github.psnrigner.discordrpcjava.impl;
 
-import org.apache.commons.lang.SystemUtils;
+
+import com.github.psnrigner.discordrpcjava.util.SystemUtils;
 
 /**
  * Base connection class
@@ -15,16 +16,16 @@ public abstract class BaseConnection
 
     static BaseConnection create()
     {
-        if (SystemUtils.IS_OS_MAC_OSX)
+        if (SystemUtils.isMacOSX())
             return new BaseConnectionOsx();
 
-        if (SystemUtils.IS_OS_UNIX)
+        if (SystemUtils.isUnix())
             return new BaseConnectionUnix();
 
-        if (SystemUtils.IS_OS_WINDOWS)
+        if (SystemUtils.isWindows())
             return new BaseConnectionWindows();
 
-        throw new IllegalStateException("This OS is not supported");
+        throw new IllegalStateException("OS is not supported: " + SystemUtils.getOsName());
     }
 
     static void destroy(BaseConnection baseConnection)

src/main/java/com/github/psnrigner/discordrpcjava/util/SystemUtils.java

@@ -0,0 +1,67 @@
+package com.github.psnrigner.discordrpcjava.util;
+
+public class SystemUtils
+{
+
+    public static boolean isWindows()
+    {
+        return is(OS.WINDOWS);
+    }
+
+    public static boolean isMacOSX()
+    {
+        return is(OS.MAC_OSX);
+    }
+
+    public static boolean isUnix()
+    {
+        return is(OS.UNIX);
+    }
+
+    public static String getOsName() {
+        return System.getProperty("os.name");
+    }
+
+    private static boolean is(OS os)
+    {
+        return OS.byOsName(System.getProperty("os.name")).equals(os);
+    }
+
+    public enum OS {
+        WINDOWS(new String[]{"Windows"}),
+        MAC_OSX(new String[]{"Mac"}),
+        UNIX(new String[]{"Linux", "LINUX", "AIX", "HP-UX", "Trix", "OS/2", "Solaris", "SunOS"}), // feel free to add
+        UNKNOWN;
+
+        private String[] osNames;
+
+        OS()
+        {
+        }
+
+        OS(String[] osNames)
+        {
+            this.osNames = osNames;
+        }
+
+
+        public String[] getOsNames()
+        {
+            return osNames;
+        }
+
+        public static OS byOsName(String osName)
+        {
+            for(OS os: OS.values()) {
+                for(String name : os.getOsNames())
+                {
+                    if(osName.startsWith(name))
+                    {
+                        return os;
+                    }
+                }
+            }
+            return UNKNOWN;
+        }
+    }
+}