content: package org.openstack4j.openstack.identity.v2.internal;
  
  import org.openstack4j.api.identity.v2.RoleService;
  import org.openstack4j.core.transport.HttpMethod;
  import org.openstack4j.model.common.ActionResponse;
  import org.openstack4j.model.identity.v2.Role;
  import org.openstack4j.openstack.identity.v2.domain.KeystoneCreateRole;
  import org.openstack4j.openstack.identity.v2.domain.KeystoneRole;
  import org.openstack4j.openstack.identity.v2.domain.KeystoneRole.Roles;
  import org.openstack4j.openstack.internal.BaseOpenStackService;
  
  import java.util.List;
  
  import static com.google.common.base.Preconditions.checkNotNull;
  
  /**
   * Identity Role based Operations Implementation
   *
   * @author Jeremy Unruh
   */
  public class RoleServiceImpl extends BaseOpenStackService implements RoleService {
  
      /**
       * {@inheritDoc}
       */
      @Override
      public ActionResponse addUserRole(String userId, String roleId) {
          return addUserRole(null, userId, roleId);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public ActionResponse addUserRole(String tenantId, String userId, String roleId) {
          return addRemoveRoles(HttpMethod.PUT, tenantId, userId, roleId);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public ActionResponse removeUserRole(String userId, String roleId) {
          return removeUserRole(null, userId, roleId);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public ActionResponse removeUserRole(String tenantId, String userId, String roleId) {
          return addRemoveRoles(HttpMethod.DELETE, tenantId, userId, roleId);
      }
  
      /**
       * Adds the remove roles.
       *
       * @param method   the method
       * @param tenantId the tenant id
       * @param userId   the user id
       * @param roleId   the role id
       * @param the      action response
       */
      private ActionResponse addRemoveRoles(HttpMethod method, String tenantId, String userId, String roleId) {
          checkNotNull(userId);
          checkNotNull(roleId);
          String uri = (tenantId != null) ? uri("/tenants/%s/users/%s/roles/OS-KSADM/%s", tenantId, userId, roleId) : uri("/users/%s/roles/OS-KSADM/%s", userId, roleId);
          return request(method, ActionResponse.class, uri).execute();
      }
  
  
      /**
       * {@inheritDoc}
       */
      @Override
      public List<? extends Role> list() {
          return get(Roles.class, uri("/OS-KSADM/roles")).execute().getList();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public List<? extends Role> listRolesForUser(String userId) {
          return listRolesForUser(userId, null);
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public List<? extends Role> listRolesForUser(String userId, String tenantId) {
          checkNotNull(userId);
          String uri = (tenantId != null) ? uri("/tenants/%s/users/%s/roles", tenantId, userId) : uri("/users/%s/roles", userId);
          return get(Roles.class, uri).execute().getList();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public ActionResponse delete(String roleId) {
          checkNotNull(roleId);
          return deleteWithResponse(uri("/OS-KSADM/roles/%s", roleId)).execute();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public Role get(String roleId) {
          checkNotNull(roleId);
          return get(KeystoneRole.class, uri("/OS-KSADM/roles/%s", roleId)).execute();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public Role create(String name) {
          checkNotNull(name);
          return post(KeystoneRole.class, uri("/OS-KSADM/roles")).entity(new KeystoneCreateRole(name)).execute();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public Role getByName(String name) {
          // Due to a bug in OpenStack Rest Service (not returning documented query) we will manually match on the list until it's resolved. Since the contract of the
          // API is against the interface we can change this anytime
          checkNotNull(name);
          List<? extends Role> roles = list();
          for (Role r : roles) {
              if (name.equalsIgnoreCase(r.getName()))
                  return r;
          }
          return null;
      }
  
  }
  