Added concept of platform to the internals.

src/main/java/net/rubygrapefruit/platform/Main.java

@@ -5,10 +5,10 @@ public class Main {
         System.out.println();
         System.out.println("* OS: " + System.getProperty("os.name") + ' ' + System.getProperty("os.version") + ' ' + System.getProperty("os.arch"));
 
-        Process process = Platform.get(Process.class);
+        Process process = Native.get(Process.class);
         System.out.println("* PID: " + process.getPid());
 
-        TerminalAccess terminalAccess = Platform.get(TerminalAccess.class);
+        TerminalAccess terminalAccess = Native.get(TerminalAccess.class);
         boolean stdoutIsTerminal = terminalAccess.isTerminal(TerminalAccess.Output.Stdout);
         boolean stderrIsTerminal = terminalAccess.isTerminal(TerminalAccess.Output.Stderr);
         System.out.println("* stdout: " + (stdoutIsTerminal ? "terminal" : "not a terminal"));
@@ -34,7 +34,8 @@ public class Main {
                 terminal.normal();
                 System.out.println();
             }
-            System.out.println();
         }
+
+        System.out.println();
     }
 }

src/main/java/net/rubygrapefruit/platform/Native.java

@@ -9,26 +9,28 @@ import java.io.PrintStream;
 /**
  * Provides access to the native integrations. Use {@link #get(Class)} to load a particular integration.
  */
-public class Platform {
+public class Native {
     private static final Object lock = new Object();
     private static boolean loaded;
 
     static <T extends NativeIntegration> T get(Class<T> type) {
         synchronized (lock) {
             if (!loaded) {
-                System.setProperty("java.library.path", new File("build/binaries").getAbsolutePath());
+                Platform platform = Platform.current();
+                if (!platform.isSupported()) {
+                    throw new NativeException(String.format("The current platform is not supported."));
+                }
                 try {
-                    File libFile = new File("build/binaries/libnative-platform.dylib");
+                    File libFile = new File("build/binaries/" + platform.getLibraryName());
-                    if (!libFile.isFile()) {
-                        libFile = new File("build/binaries/libnative-platform.so");
-                    }
                     System.load(libFile.getCanonicalPath());
                 } catch (IOException e) {
                     throw new RuntimeException(e);
                 }
                 int nativeVersion = NativeLibraryFunctions.getVersion();
                 if (nativeVersion != NativeLibraryFunctions.VERSION) {
-                    throw new NativeException(String.format("Unexpected native library version loaded. Expected %s, was %s.", nativeVersion, NativeLibraryFunctions.VERSION));
+                    throw new NativeException(String.format(
+                            "Unexpected native library version loaded. Expected %s, was %s.", nativeVersion,
+                            NativeLibraryFunctions.VERSION));
                 }
                 loaded = true;
             }

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();
+        }
+    }
+}

src/test/groovy/net/rubygrapefruit/platform/PosixFileTest.groovy

@@ -6,7 +6,7 @@ import org.junit.rules.TemporaryFolder
 
 class PosixFileTest extends Specification {
     @Rule TemporaryFolder tmpDir
-    final PosixFile file = Platform.get(PosixFile.class)
+    final PosixFile file = Native.get(PosixFile.class)
 
     def "can set mode on a file"() {
         def testFile = tmpDir.newFile("test.txt")

src/test/groovy/net/rubygrapefruit/platform/ProcessTest.groovy

@@ -6,7 +6,7 @@ import spock.lang.Specification
 
 class ProcessTest extends Specification {
     @Rule TemporaryFolder tmpDir
-    final Process process = Platform.get(Process.class)
+    final Process process = Native.get(Process.class)
 
     def "can get PID"() {
         expect:

src/test/groovy/net/rubygrapefruit/platform/TerminalTest.groovy

@@ -6,7 +6,7 @@ import spock.lang.Specification
 
 class TerminalTest extends Specification {
     @Rule TemporaryFolder tmpDir
-    final TerminalAccess terminal = Platform.get(TerminalAccess.class)
+    final TerminalAccess terminal = Native.get(TerminalAccess.class)
 
     def "can check if attached to terminal"() {
         expect: