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/**
* Copyright (c) 2008, SnakeYAML
*
* 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.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<Object, Object> 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() {
Yaml yaml = new Yaml(new SelectiveConstructor());
List<?> data =
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 + "]";
}
}
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