diff options
Diffstat (limited to 'jni-library/src/main/scala/ch/jodersky/jni/NativeLoader.scala')
-rw-r--r-- | jni-library/src/main/scala/ch/jodersky/jni/NativeLoader.scala | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/jni-library/src/main/scala/ch/jodersky/jni/NativeLoader.scala b/jni-library/src/main/scala/ch/jodersky/jni/NativeLoader.scala deleted file mode 100644 index c806464..0000000 --- a/jni-library/src/main/scala/ch/jodersky/jni/NativeLoader.scala +++ /dev/null @@ -1,78 +0,0 @@ -package ch.jodersky.jni - -import java.io.{File, FileOutputStream, InputStream, OutputStream} - -/** - * Provides enhanced native library loading functionality. - */ -object NativeLoader { - - /** Name of the shared library file that is contained in a jar. */ - final val LibraryName = "library" - - final val BufferSize = 4096 - - /** Extracts a resource from this class loader to a temporary file. */ - private def extract(path: String): Option[File] = { - var in: Option[InputStream] = None - var out: Option[OutputStream] = None - - try { - in = Option(NativeLoader.getClass.getResourceAsStream(path)) - if (in.isEmpty) return None - - val file = File.createTempFile(path, "") - out = Some(new FileOutputStream(file)) - - val buffer = new Array[Byte](BufferSize) - var length = -1; - do { - length = in.get.read(buffer) - if (length != -1) out.get.write(buffer, 0, length) - } while (length != -1) - - Some(file) - } finally { - in.foreach(_.close) - out.foreach(_.close) - } - } - - private def loadError(msg: String): Nothing = throw new UnsatisfiedLinkError( - "Error during native library extraction " + - "(this can happen if your platform is not supported): " + - msg - ) - - /** - * Gets the absolute, full path of a native library on the classpath, given a libraryPath - * and platform. - */ - def fullLibraryPath(libraryPath: String, platform: Platform) = { - libraryPath + "/" + platform.id + "/" + LibraryName - } - - private def loadFromJar(libraryPath: String): Unit = { - val platform = Platform.current.getOrElse { - loadError("Cannot determine current platform.") - } - - val resource = fullLibraryPath(libraryPath, platform) - - val file = extract(resource) getOrElse loadError( - s"Shared library $resource not found." - ) - System.load(file.getAbsolutePath()) - } - - /** - * Loads a native library from the available library path or falls back - * to extracting and loading a native library from available resources. - */ - def load(libraryPath: String, library: String): Unit = try { - System.loadLibrary(library) - } catch { - case ex: UnsatisfiedLinkError => loadFromJar(libraryPath) - } - -} |