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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.tika.mime;
18  
19  import java.util.HashMap;
20  import java.util.Map;
21  
22  /**
23   * Registry of Internet media types.
24   */
25  public final class MediaTypeRegistry {
26  
27      private final Map<MediaType, MediaType> aliases =
28          new HashMap<MediaType, MediaType>();
29  
30      public void addAlias(MediaType canonical, MediaType alias) {
31          aliases.put(alias, canonical);
32      }
33  
34      public MediaType unalias(MediaType type) {
35          MediaType canonical = aliases.get(type.getBaseType());
36          if (canonical != null) {
37              return new MediaType(canonical, type.getParameters());
38          } else {
39              return type;
40          }
41      }
42  
43  }