Added concept of platform to the internals.

src/main/java/net/rubygrapefruit/platform/internal/Platform.java

@@ -0,0 +1,61 @@
+package net.rubygrapefruit.platform.internal;
+
+public abstract class Platform {
+    private static Platform platform;
+
+    public static Platform current() {
+        synchronized (Platform.class) {
+            if (platform == null) {
+                String osName = System.getProperty("os.name").toLowerCase();
+                if (osName.contains("windows")) {
+                    platform = new Windows();
+                } else if (osName.contains("linux")) {
+                    platform = new Linux();
+                } else if (osName.contains("os x")) {
+                    platform = new OsX();
+                } else {
+                    platform = new Unsupported();
+                }
+            }
+            return platform;
+        }
+    }
+
+    public boolean isSupported() {
+        return true;
+    }
+
+    public abstract String getLibraryName();
+
+    private static class Windows extends Platform {
+        @Override
+        public String getLibraryName() {
+            return "native-platform.dll";
+        }
+    }
+
+    private static class Linux extends Platform {
+        @Override
+        public String getLibraryName() {
+            return "libnative-platform.so";
+        }
+    }
+
+    private static class OsX extends Platform {
+        @Override
+        public String getLibraryName() {
+            return "libnative-platform.dylib";
+        }
+    }
+
+    private static class Unsupported extends Platform {
+        @Override
+        public boolean isSupported() {
+            return false;
+        }
+
+        public String getLibraryName() {
+            throw new UnsupportedOperationException();
+        }
+    }
+}