DefaultInstanceManager can not access a member of class with modifiers "" - jsf-2

Question

not sure whats wrong here, please assist.
this is the exception :
SEVERE: Exception starting filter com.bannerplay.beans.LoginFilter
java.lang.IllegalAccessException: Class org.apache.catalina.core.DefaultInstanceManager can not access a member of class com.bannerplay.beans.LoginFilter with modifiers ""
at sun.reflect.Reflection.ensureMemberAccess(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:134)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:256)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:382)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:103)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4650)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5306)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
login.xhtml
<h:form>
Username : <h:inputText value="#{loginBean.username}" />
Password : <h:inputSecret value="#{loginBean.password}" />
<h:commandButton value="Login" action="#{loginBean.checkLogin}" />
</h:form>
web.xml
<filter>
<filter-name>LoginFilter</filter-name>
<filter-class>com.bannerplay.beans.LoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<servlet-name>FacesServlet</servlet-name>
<url-pattern>/admin/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>/login.xhtml</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>FacesServlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
...
and LoginFilter.java
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
#WebFilter("/admin/*")
class LoginFilter implements Filter {
#Override
public void doFilter(ServletRequest request , ServletResponse response , FilterChain chain) throws ServletException, IOException {
HttpSession session = ((HttpServletRequest) request).getSession();
UserBean userBean = (UserBean) session.getAttribute("userBean");
if (userBean != null) {
User user = userBean.getUser();
if (user == null) {
((HttpServletResponse) response).sendRedirect("/login.xhtml");
} else
chain.doFilter(request, response);
} else
((HttpServletResponse) response).sendRedirect("/login.xhtml");
}
public void init(FilterConfig fc) {
}
public void destroy() {
}
}
I have no idea where this exception comes from,please shade some light on this issue. Thanks!
EDIT1: adding UserBean.java code :
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
#ManagedBean
#SessionScoped
class UserBean implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
private User user;
}
BTW, SEVERE: Context [/projectName] startup failed due to previous errors

Answer 1

Change :
class LoginFilter implements Filter {
to
public class LoginFilter implements Filter {

Answer 2

For me the issue was that of the 'constructor' not being public.