import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
public class JNIDevelopment {
	byte[] cache;
	List<String> sources;
	public JNIDevelopment(){
		cache = new byte[1024];
		sources = new LinkedList<String>();
		//這里加入本地庫文件名，也可以稍加修改讀取一個外部xml或properties 
		sources.add("luajava-1.1.dll");
		sources.add("libluajava-1.1.so");
	}
	private Boolean sourceExist(String sourceName){
		File f = new File("." + File.separator + sourceName);
		return f.exists();
	}
	public void doDefaultDevelopment(){
		for (String s:sources){
			doDevelopment(s);
		}
	}
	public Boolean doDevelopment(String sourceName){
		if(sourceExist(sourceName)){
			return true;
		} else{
			try{
				File f = new File("." + File.separator + sourceName);
				if(!f.exists()){
					f.createNewFile();
					System.out.println("[JNIDEV]:DEFAULT JNI INITION:"+sourceName);
				}
				FileOutputStream os = new FileOutputStream(f);
				InputStream is = getClass().getResourceAsStream(sourceName);
				if(is == null){
					os.close();
					return false;
				}
				Arrays.fill(cache,(byte)0);
				int realRead = is.read(cache);
				while(realRead != -1){
					os.write(cache, 0, realRead);
					realRead = is.read(cache);
				}
				os.close();
			}
			catch(Exception e){
				System.out.println("[JNIDEV]:ERROR IN COPY JNI LIB!");
				e.printStackTrace();
				return false;
			}
		}
		return true;
	}
	public static void main(String[] args) {
		JNIDevelopment deve = new JNIDevelopment();
		deve.doDefaultDevelopment();
		try{
			System.loadLibrary("luajava-1.1");
			System.out.println("本地庫加載成功");
		}
		catch(UnsatisfiedLinkError e){
			System.out.println("本地庫加載失敗");
		}
	}
}