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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.http.config;
29  
30  import java.util.HashMap;
31  import java.util.Locale;
32  import java.util.Map;
33  
34  import org.apache.http.annotation.NotThreadSafe;
35  import org.apache.http.util.Args;
36  
37  /**
38   * Builder for {@link Registry} instances.
39   *
40   * @since 4.3
41   */
42  @NotThreadSafe
43  public final class RegistryBuilder<I> {
44  
45      private final Map<String, I> items;
46  
47      public static <I> RegistryBuilder<I> create() {
48          return new RegistryBuilder<I>();
49      }
50  
51      RegistryBuilder() {
52          super();
53          this.items = new HashMap<String, I>();
54      }
55  
56      public RegistryBuilder<I> register(final String id, final I item) {
57          Args.notEmpty(id, "ID");
58          Args.notNull(item, "Item");
59          items.put(id.toLowerCase(Locale.ROOT), item);
60          return this;
61      }
62  
63      public Registry<I> build() {
64          return new Registry<I>(items);
65      }
66  
67      @Override
68      public String toString() {
69          return items.toString();
70      }
71  
72  }