Container


1   /*
2    * Copyright 2005 Joe Walker
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  package org.directwebremoting;
17  
18  import java.util.Collection  ;
19  
20  /**
21   * A very basic IoC container
22   * @author Joe Walker [joe at getahead dot ltd dot uk]
23   */
24  public interface Container
25  {
26      /**
27       * Get an instance of a bean of a given name (usually name=class name).
28       * @param name The type to get an instance of
29       * @return The object of the given type, or null if the object does not exist
30       */
31      Object   getBean(String   name);
32  
33      /**
34       * Get a list of all the available beans.
35       * Implementation of this method is optional so it is valid for this method
36       * to return an empty collection, but to return Objects when queried
37       * directly using {@link #getBean(String)}. This method should only be used
38       * for debugging purposes.
39       * @return A collection containing all the availble bean names.
40       */
41      Collection   getBeanNames();
42  }
43

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