how to make permission object and pass it as a argument in isPermitted method

[reena upadhyay]

I have a string based permission check, like:

 if (currentUser.isPermitted("admin:write")) {
                    log.info("Yes ["+ currentUser.getPrincipal() +"] have write 
permisiion");
                } else {
                    log.info("Sorry, user ["+ currentUser.getPrincipal() +"] 
doesn't have write permisiion.");
          }

I have gone through this link: 
https://shiro.apache.org/authorization.html#Authorization-ObjectbasedPermissionChecks
 and i want that, Instead of passing String  in isPermitted() method, I want to 
pass permission object  as a argument in isPermitted method,

For this I am doing:

//getting apache.shiro.dto.Rolespermission cannot be cast to 
org.apache.shiro.authz.Permission exception in below line
 Permission rolePerm = (Permission) new Rolespermission("access", "admin");
                
                //check whether user with role admin has access permission or 
not 
                if (currentUser.isPermitted(rolePerm)) {
                    log.info("Yes ["+ currentUser.getPrincipal() +"] have 
access permisiion");
                } else {
                    log.info("Sorry, user ["+ currentUser.getPrincipal() +"] 
doesn't have access permisiion.");
                }
              

My Rolespermission is just a bean class.
public class Rolespermission {

    private String permission;
    private String roleName;
    
    public Rolespermission(String permission, String roleName) {
        this.permission = permission;
        this.roleName = roleName;
    }
    
//getter setter

}  


I am getting apache.shiro.dto.Rolespermission cannot be cast to 
org.apache.shiro.authz.Permission exception while construction Permission 
object.

Can anyone please help me how to make Permissionobject?