| /** |
| * Copyright (c) 2008, http://www.snakeyaml.org |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.yaml.snakeyaml.issues.issue127; |
| |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| |
| import junit.framework.TestCase; |
| |
| import org.yaml.snakeyaml.Yaml; |
| import org.yaml.snakeyaml.nodes.Node; |
| import org.yaml.snakeyaml.nodes.Tag; |
| import org.yaml.snakeyaml.representer.Represent; |
| import org.yaml.snakeyaml.representer.Representer; |
| |
| public class NullAliasTest extends TestCase { |
| private static final Tag MY_TAG = new Tag("tag:example.com,2011:bean"); |
| |
| public void testRespresenter() { |
| Bean bean = new Bean(); |
| |
| bean.setA("a"); // leave b null |
| Yaml yaml = new Yaml(new BeanRepresenter()); |
| String output = yaml.dump(bean); |
| assertEquals("!<tag:example.com,2011:bean>\na: a\nb: null\n", output); |
| } |
| |
| class BeanRepresenter extends Representer { |
| public BeanRepresenter() { |
| this.representers.put(Bean.class, new RepresentBean()); |
| } |
| |
| private class RepresentBean implements Represent { |
| public Node representData(Object data) { |
| Bean bean = (Bean) data; |
| Map<String, Object> fields = new LinkedHashMap<String, Object>(2); |
| fields.put("a", bean.getA()); |
| fields.put("b", bean.getB()); |
| return representMapping(MY_TAG, fields, false); |
| } |
| } |
| } |
| } |