/** | |
* Copyright (c) 2008-2011, 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 examples; | |
import java.io.IOException; | |
import java.util.List; | |
import java.util.Map; | |
import junit.framework.TestCase; | |
import org.yaml.snakeyaml.Yaml; | |
import org.yaml.snakeyaml.constructor.Constructor; | |
import org.yaml.snakeyaml.nodes.MappingNode; | |
import org.yaml.snakeyaml.nodes.NodeId; | |
/** | |
* Example for http://code.google.com/p/snakeyaml/wiki/howto | |
*/ | |
public class SelectiveConstructorTest extends TestCase { | |
class SelectiveConstructor extends Constructor { | |
public SelectiveConstructor() { | |
// define a custom way to create a mapping node | |
yamlClassConstructors.put(NodeId.mapping, new MyPersistentObjectConstruct()); | |
} | |
class MyPersistentObjectConstruct extends Constructor.ConstructMapping { | |
@Override | |
protected Object constructJavaBean2ndStep(MappingNode node, Object object) { | |
Class type = node.getType(); | |
if (type.equals(MyPersistentObject.class)) { | |
// create a map | |
Map map = constructMapping(node); | |
String id = (String) map.get("id"); | |
return new MyPersistentObject(id, 17); | |
} else { | |
// create JavaBean | |
return super.constructJavaBean2ndStep(node, object); | |
} | |
} | |
} | |
} | |
public void testConstructor() throws IOException { | |
Yaml yaml = new Yaml(new SelectiveConstructor()); | |
List<?> data = (List<?>) yaml | |
.load("- 1\n- 2\n- !!examples.MyPersistentObject {amount: 222, id: persistent}"); | |
// System.out.println(data); | |
assertEquals(3, data.size()); | |
MyPersistentObject myObject = (MyPersistentObject) data.get(2); | |
assertEquals(17, myObject.getAmount()); | |
assertEquals("persistent", myObject.getId()); | |
} | |
} | |
class MyPersistentObject { | |
private String id; | |
private int amount; | |
public MyPersistentObject() { | |
this.id = "noid"; | |
this.amount = 222; | |
} | |
public MyPersistentObject(String id, int amount) { | |
this.id = id; | |
this.amount = amount; | |
} | |
public String getId() { | |
return id; | |
} | |
public void setId(String id) { | |
this.id = id; | |
} | |
public int getAmount() { | |
return amount; | |
} | |
public void setAmount(int amount) { | |
this.amount = amount; | |
} | |
@Override | |
public String toString() { | |
return "MyPersistentObject [id=" + id + ", amount=" + amount + "]"; | |
} | |
} |