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1   /*
2    * Copyright 2004-2005 Dan Washusen
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.reactive.beans.factory.config;
18  
19  /***
20   * The object representation of a configuration placeholder.
21   *
22   * @author Dan Washusen
23   * @version $Id: Placeholder.java,v 1.1 2004/12/26 23:42:29 dan_washusen Exp $
24   * @since 22/12/2004
25   * @see AbstractPlaceholder
26   */
27  public interface Placeholder {
28      /***
29       * Returns the key that will be used to ask the configurable source for a value.
30       * @return The configation key
31       */
32      String getKey();
33  
34      /***
35       * The class the the configuration key will resolve to.  The most common will probably be the String class as
36       * spring takes care of most of the conversions for you
37       * @return The class that the key resolves to
38       */
39      Class getType();
40  }