content: package org.apache.archiva.repository;
  
  /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.
   */
  
  import org.apache.archiva.repository.storage.RepositoryStorage;
  
  import java.util.List;
  
  /**
   * Interface for repository groups.
   *
   * Repository groups are a combined view over a list of repositories.
   * All repositories of this group must be of the same type.
   *
   * Repository groups are read only. You cannot store artifacts into a repository group.
   *
   * This interface extends <code>{@link RepositoryStorage}</code> to provide access to the merged
   * index data files and other metadata.
   *
   */
  public interface RepositoryGroup extends Repository, RepositoryStorage {
  
      /**
       * Returns the list of repositories. The order of the elements represents
       * the order of getting artifacts (first one wins).
       *
       *
       * @return
       */
      List<ManagedRepository> getRepositories();
  
      /**
       * Returns true, if the given repository is part of this group.
       *
       * @param repository The repository to check.
       * @return True, if it is part, otherwise false.
       */
      boolean contains(ManagedRepository repository);
  
      /**
       * Returns true, if the repository with the given id is part of this group.
       *
       * @param id The repository id to check
       * @return True, if it is part, otherwise false
       */
      boolean contains(String id);
  
      /**
       * Returns the time to live in seconds for the merged index.
       *
       * @return
       */
      int getMergedIndexTTL();
  }
  