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1   /**
2    * Copyright (c) 2008-2011, 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  
17  package org.yaml.snakeyaml.issues.issue48;
18  
19  import java.io.IOException;
20  
21  import junit.framework.TestCase;
22  
23  import org.yaml.snakeyaml.Yaml;
24  import org.yaml.snakeyaml.introspector.Property;
25  import org.yaml.snakeyaml.nodes.NodeTuple;
26  import org.yaml.snakeyaml.nodes.Tag;
27  import org.yaml.snakeyaml.representer.Representer;
28  
29  public class SkipJavaBeanPropertyTest extends TestCase {
30      public void testWithNull() throws IOException {
31          Bean bean = new Bean();
32          bean.setValue(3);
33          Yaml yaml = new Yaml();
34          String output = yaml.dumpAsMap(bean);
35          // System.out.println(output);
36          assertEquals("name: null\nvalue: 3\n", output);
37      }
38  
39      public void testWithoutNull() throws IOException {
40          Bean bean = new Bean();
41          bean.setValue(5);
42          Yaml yaml = new Yaml(new MyRepresenter());
43          String output = yaml.dumpAsMap(bean);
44          // System.out.println(output);
45          assertEquals("value: 5\n", output);
46      }
47  
48      private class MyRepresenter extends Representer {
49          @Override
50          protected NodeTuple representJavaBeanProperty(Object bean, Property property, Object value,
51                  Tag customTag) {
52              if (value != null) {
53                  return super.representJavaBeanProperty(bean, property, value, customTag);
54              } else {
55                  return null;
56              }
57          }
58      }
59  }