How to use org.apache.sentry.provider.db.service.model

public MSentryGroup(String groupName, long createTime, Set<MSentryRole> roles) {
 this.groupName = MSentryUtil.safeIntern(groupName);
 this.createTime = createTime;
 this.roles = roles;
}

public MSentryGroup(String groupName, long createTime, Set<MSentryRole> roles) {
 this.setGroupName(groupName);
 this.createTime = createTime;
 this.roles = roles;
}

public static boolean isNULL(String s) {
 return !notNULL(s);
}

public MSentryGMPrivilege(String componentName, String serviceName,
  List<? extends Authorizable> authorizables,
  String action, Boolean grantOption) {
 this.componentName = MSentryUtil.safeIntern(componentName);
 this.serviceName = MSentryUtil.safeIntern(serviceName);
 this.action = MSentryUtil.safeIntern(action);
 this.grantOption = grantOption;
 this.roles = new HashSet<>();
 this.createTime = System.currentTimeMillis();
 setAuthorizables(authorizables);
}

public void appendGMPrivilege(MSentryGMPrivilege gmPrivilege) {
 if (gmPrivileges.add(gmPrivilege)) {
  gmPrivilege.appendRole(this);
 }
}

private boolean isPrivilegeStale(MSentryGMPrivilege privilege) {
 if (privilege.getRoles().isEmpty()) {
  return true;
 }
 return false;
}

public void removeGroup(MSentryGroup group) {
 if (groups.remove(group)) {
  group.removeRole(this);
 }
}

public void appendPrivilege(MSentryPrivilege privilege) {
 if (privileges.add(privilege)) {
  privilege.appendPrincipal(this);
 }
}

public void appendGroup(MSentryGroup group) {
 if (groups.add(group)) {
  group.appendRole(this);
 }
}

public void removeRole(MSentryRole role) {
 if (roles.remove(role)) {
  role.removeGroup(this);
 }
}

public void appendRole(MSentryRole role) {
 if (roles.add(role)) {
  role.appendGMPrivilege(this);
 }
}

public void appendRole(MSentryRole role) {
 if (roles.add(role)) {
  role.appendGroup(this);
 }
}

public void appendPrivilege(MSentryPrivilege privilege) {
 if (privileges.add(privilege)) {
  privilege.appendRole(this);
 }
}

public void removeRole(MSentryRole role) {
 if (roles.remove(role)) {
  role.removeUser(this);
 }
}

public void removeUser(MSentryUser user) {
 if (users.remove(user)) {
  user.removeRole(this);
 }
}

public void appendGMPrivilege(MSentryGMPrivilege gmPrivilege) {
 if (gmPrivileges.add(gmPrivilege)) {
  gmPrivilege.appendRole(this);
 }
}

public static boolean isNULL(String s) {
 return !notNULL(s);
}

public MPathToPersist(long authzObjectId, String path) {
 this.authzObjectId = authzObjectId;
 this.path = MSentryUtil.safeIntern(path);
}

public MPath(String path) {
 this.path = MSentryUtil.safeIntern(path);
}

public MSentryRole(String roleName, long createTime) {
 this.roleName = MSentryUtil.safeIntern(roleName);
 this.createTime = createTime;
 privileges = new HashSet<>();
 gmPrivileges = new HashSet<>();
 groups = new HashSet<>();
 users = new HashSet<>();
}