content: /*
   * Copyright (c) OSGi Alliance (2008, 2009). All Rights Reserved.
   *
   * 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.osgi.service.blueprint.reflect;
  
  /**
   * Metadata for a map entry.
   * 
   * This type is used by {@link MapMetadata}, {@link PropsMetadata} and
   * {@link ServiceMetadata}.
   * 
   * @ThreadSafe
   * @version $Revision$
   */
  public interface MapEntry {
  	/**
  	 * Return the Metadata for the key of the map entry.
  	 * 
  	 * This is specified by the <code>key</code> attribute or element.
  	 * 
  	 * @return The Metadata for the key of the map entry. This must not be
  	 *         <code>null</code>.
  	 */
  	NonNullMetadata getKey();
  
  	/**
  	 * Return the Metadata for the value of the map entry.
  	 * 
  	 * This is specified by the <code>value</code> attribute or element.
  	 * 
  	 * @return The Metadata for the value of the map entry. This must not be
  	 *         <code>null</code>.
  	 */
  	Metadata getValue();
  }
  