Natives.java

package tk.amberide.ide.os;

import java.io.*;
import java.net.URL;

/**
 *
 * @author Tudor
 */
public final class Natives {

    private static final boolean DEV = true;
    private static final String REV = "6";
    private static final String NATIVE_DIR = "native/";
    private static final String WIN_DIR = NATIVE_DIR + "windows/";
    private static final String NIX_DIR = NATIVE_DIR + "linux/";
    private static final String MAC_DIR = NATIVE_DIR + "mac/";
    private static final String CACHE_DIR = System.getProperty("java.io.tmpdir") + File.separatorChar
            + "ambercache_1.0.0_" + (DEV ? System.currentTimeMillis() : REV);

    public static void unpack() {
        System.setProperty("org.lwjgl.librarypath", CACHE_DIR);
        String amberOs = "";

        boolean is64Bit = OS.is64Bit();
        switch (OS.getPlatform()) {
            case WINDOWS:
                if (is64Bit) {
                    unpack(WIN_DIR + "OpenAL64.dll");
                    unpack(WIN_DIR + "lwjgl64.dll");
                } else {
                    unpack(WIN_DIR + "OpenAL32.dll");
                    unpack(WIN_DIR + "lwjgl.dll");
                    unpack(WIN_DIR + (amberOs = "amberos32.dll"));
                }
                break;
            case LINUX:
                if (is64Bit) {
                    unpack(NIX_DIR + "libopenal64.so");
                    unpack(NIX_DIR + "liblwjgl64.so");
                } else {
                    unpack(NIX_DIR + "libopenal.so");
                    unpack(NIX_DIR + "liblwjgl.so");
                }
                break;
            case MAC:
                unpack(MAC_DIR + "liblwjgl.jnilib");
                unpack(MAC_DIR + "libopenal.dylib");
                break;
            default:
                throw new UnsupportedOperationException("unsupported platform");
        }
        if (amberOs.length() > 0)
            System.setProperty("amber.os.librarypath", CACHE_DIR + File.separator + amberOs);
    }

    private static void unpack(String path) {
        try {
            URL url = ClassLoader.getSystemResource(path);

            File pathDir = new File(CACHE_DIR);
            pathDir.mkdirs();
            File libfile = new File(pathDir, path.substring(path.lastIndexOf("/"), path.length()));

            if (!libfile.exists()) {
                libfile.deleteOnExit();
                InputStream in = url.openStream();
                OutputStream out = new BufferedOutputStream(new FileOutputStream(libfile));

                int len;
                byte[] buffer = new byte[8192];
                while ((len = in.read(buffer)) > -1) {
                    out.write(buffer, 0, len);
                }
                out.flush();
                out.close();
                in.close();
            }
        } catch (IOException x) {
            throw new RuntimeException("could not unpack binaries", x);
        }
    }
}