1 files changed, 38 insertions, 0 deletions
diff --git a/flow/src/main/scala/com/github/jodersky/flow/internal/NativeLoader.scala b/flow/src/main/scala/com/github/jodersky/flow/internal/NativeLoader.scala
new file mode 100644
index 0000000..034be96
--- /dev/null
+++ b/flow/src/main/scala/com/github/jodersky/flow/internal/NativeLoader.scala
@@ -0,0 +1,38 @@
+package com.github.jodersky.flow.internal
+
+import java.io.File
+import java.io.FileOutputStream
+import scalax.file.Path
+import scalax.io.Resource
+import scala.util.Try
+
+/** Handles loading of the current platform's native library for flow. */
+object NativeLoader {
+
+  def extract(): Option[File] = {
+    val os = System.getProperty("os.name").toLowerCase.filter(_ != ' ')
+    val arch = System.getProperty("os.arch").toLowerCase
+    val fqlib = System.mapLibraryName("flow") //fully qualified library name
+
+    val in = NativeLoader.getClass().getResourceAsStream(s"/native/${arch}-${os}/${fqlib}")
+    if (in == null) return None
+
+    val temp = Path.createTempFile()
+    Resource.fromInputStream(in).copyDataTo(temp)
+    temp.fileOption
+  }
+
+  def loadFromJar() = extract() match {
+    case Some(file) => System.load(file.getAbsolutePath)
+    case None => throw new UnsatisfiedLinkError("cannot extract native library, the native library may not exist for your specific os/architecture combination")
+  }
+
+  def load = {
+    try {
+      System.loadLibrary("flow")
+    } catch {
+      case ex: UnsatisfiedLinkError => loadFromJar()
+    }
+  }
+
+}
+\ No newline at end of file