public class ServerClassLoader extends ClassLoader {
	private String path;
	private HashMap<String, Class<?>> cache = new HashMap<String, Class<?>>();
	
	public ServerClassLoader(String path, ClassLoader parent) {		
		super(parent);
		this.path = path;
	}
	
	@Override
	public Class<?> loadClass(String name) {
		File f = new File(path + name.replace('.', '/') + ".class");
		try {
			if (f.exists() == false)		
				return super.findSystemClass(name);
			
			if (cache.get(name) != null) 
				return cache.get(name);
			
			FileInputStream is = new FileInputStream(f);			
			
			byte[] data = new byte[(int)f.length()];			
			
			if (is.read(data, 0, (int)f.length()) < 0) {
				throw new IOException("");
			}
			
			Class<?> cls = defineClass(name, data, 0, (int)f.length()); 
			
			cache.put(name, cls);
			
			return cls;
		}
		catch(FileNotFoundException e) {
			return null;
		}
		catch(ClassNotFoundException e) {
			return null;
		}
		catch(IOException e) {
			return null;
		}
	}

java.lang.NoClassDefFoundError: org/hibernate/Session
	java.lang.Class.getDeclaredMethods0(Native Method)
	java.lang.Class.privateGetDeclaredMethods(Class.java:2442)
	java.lang.Class.getDeclaredMethod(Class.java:1952)
	service.Engine.invoke(Engine.java:105)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:601)
	com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
	com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ObjectOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:258)
	com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
	com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)
	com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
	com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
	com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
	com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)
	com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)
	com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
	com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
	com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
	com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
	com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:708)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)