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1   /*
2    * Copyright 1999-2004 The Apache Software Foundation
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.apache.commons.chain.impl;
18  
19  import java.util.HashMap;
20  import java.util.Iterator;
21  import java.util.Map;
22  import org.apache.commons.chain.Catalog;
23  import org.apache.commons.chain.CatalogFactory;
24  
25  /***
26   * <p>A simple implementation of {@link CatalogFactory}.</p>
27   *
28   * @author Sean Schofield
29   * @version $Revision: 1.4 $ $Date: 2004/11/30 05:52:23 $
30   */
31  
32  public class CatalogFactoryBase extends CatalogFactory {
33  
34  
35      // ----------------------------------------------------------- Constructors
36  
37  
38      /***
39       * <p>Construct an empty instance of {@link CatalogFactoryBase}.  This
40       * constructor is intended solely for use by {@link CatalogFactory}.</p>
41       */
42      public CatalogFactoryBase() { }
43  
44  
45      // ----------------------------------------------------- Instance Variables
46  
47  
48      /***
49       * <p>The default {@link Catalog} for this {@link CatalogFactory).</p>
50       */
51      private Catalog catalog = null;
52  
53  
54      /***
55       * <p>Map of named {@link Catalog}s, keyed by catalog name.</p>
56       */
57      private Map catalogs = new HashMap();
58  
59  
60      // --------------------------------------------------------- Public Methods
61  
62  
63      // Documented in CatalogFactory interface
64      public Catalog getCatalog() {
65  
66          return catalog;
67  
68      }
69  
70  
71      // Documented in CatalogFactory interface
72      public void setCatalog(Catalog catalog) {
73  
74          this.catalog = catalog;
75  
76      }
77  
78  
79      // Documented in CatalogFactory interface
80      public Catalog getCatalog(String name) {
81  
82          synchronized (catalogs) {
83              return (Catalog) catalogs.get(name);
84          }
85  
86      }
87  
88  
89      // Documented in CatalogFactory interface
90      public void addCatalog(String name, Catalog catalog) {
91  
92          synchronized (catalogs) {
93              catalogs.put(name, catalog);
94          }
95  
96      }
97  
98  
99      // Documented in CatalogFactory interface
100     public Iterator getNames() {
101 
102         synchronized (catalogs) {
103             return catalogs.keySet().iterator();
104         }
105 
106     }
107 
108 
109 }