content: /**
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.aurora.scheduler.http.api.security;
  
  import com.google.inject.Binder;
  import com.google.inject.binder.LinkedBindingBuilder;
  import com.google.inject.multibindings.Multibinder;
  
  import org.apache.shiro.realm.Realm;
  
  /**
   * Utilities for configuring Shiro.
   */
  public final class ShiroUtils {
    private ShiroUtils() {
      // Utility class.
    }
  
    /**
     * Enable a new Shiro Realm. All realms enabled this way are passed to a
     * {@link org.apache.shiro.authc.pam.ModularRealmAuthenticator}, which is used as the primary
     * {@link org.apache.shiro.realm.Realm} for the application.
     *
     * @param binder The current module's binder.
     * @return A binding builder that can be used to add a realm to the injector.
     */
    public static LinkedBindingBuilder<Realm> addRealmBinding(Binder binder) {
      return Multibinder.newSetBinder(binder, Realm.class).addBinding();
    }
  }
  