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1   /**
2    * Copyright (c) 2008-2012, http://www.snakeyaml.org
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 examples;
17  
18  import java.util.Map;
19  import java.util.TreeMap;
20  
21  import junit.framework.TestCase;
22  
23  import org.yaml.snakeyaml.Yaml;
24  import org.yaml.snakeyaml.constructor.Constructor;
25  
26  public class CustomMapExampleTest extends TestCase {
27      public void testMap() {
28          Yaml yaml = new Yaml(new CustomConstructor());
29          @SuppressWarnings("unchecked")
30          Map<Integer, String> data = (Map<Integer, String>) yaml
31                  .load("{2: '222', 1: '111', 3: '333'}");
32          assertTrue(data instanceof TreeMap);
33          Object[] keys = data.keySet().toArray();
34          // must be sorted
35          assertEquals(new Integer(1), keys[0]);
36          assertEquals(new Integer(2), keys[1]);
37          assertEquals(new Integer(3), keys[2]);
38      }
39  
40      class CustomConstructor extends Constructor {
41          @Override
42          protected Map<Object, Object> createDefaultMap() {
43              return new TreeMap<Object, Object>();
44          }
45      }
46  }