content: package org.apache.archiva.repository.content;
  
  /*
   * 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.
   */
  
  /**
   *
   * A data item is a item that is not a real artifact because it does not have
   * a version, but is normally file based.
   *
   * @author Martin Stockhammer <martin_s@apache.org>
   */
  public interface DataItem extends ContentItem
  {
  
      /**
       * Returns the identifier of the data item.
       * @return the identifier string
       */
      String getId( );
  
      /**
       * Returns the extension of the file. This method should always return the extension string after the last
       * '.'-character.
       *
       * @return the file name extension
       */
      default String getExtension( )
      {
          final String name = getAsset( ).getName( );
          final int idx = name.lastIndexOf( '.' )+1;
          if ( idx > 0 )
          {
              return name.substring( idx );
          }
          else
          {
              return "";
          }
      }
  
      /**
       * Should return the mime type of the artifact.
       *
       * @return the mime type of the artifact.
       */
      String getContentType( );
  
  
      /**
       * Short cut for the file name. Should always return the same value as the artifact name.
       *
       * @return the name of the file
       */
      default String getFileName( )
      {
          return getAsset( ).getName( );
      }
  
      /**
       * Returns the
       * @return the type of the item
       */
      DataItemType getDataType();
  
  }
  